APSC 230 Laboratory Safety Manual - ece.ubc.caleos/pdf/a230/handouts/safety.pdfAPSC 230 Lab Safety...

APSC 230 Lab Safety Manual of 41

APSC 230 Laboratory Safety Manual Enclosed are some guidelines on how to use various hand and power tools that you will be using as part of your APSC 230 (and APSC 330 and 430) design projects. A brief overview of these guidelines will be presented as part of a safety orientation. BEFORE you can use any of the tools, you must complete the following FOUR items.

1. Attended the safety orientation (will be during one of the scheduled APSC 230 laboratory periods)

2. Read ALL of the enclosed documentation 3. Sign and return an acknowledgement of risk from to the IGEN Program

Administrative Assistant. An acknowledgement of risk form is attached to the back of this package.

4. Write and pass the safety quiz. Note that the safety orientation and attached reading only cover material related to expected normal activities. If you are faced with a situation where you need to use a tool for which you have not received proper training to use, or a situation where you need to use a tool for a purpose that you are not familiar with, then STOP. OBTAIN ASSISTANCE FROM THE COURSE INSTRUCTOR(S) ON HOW TO PROPERLY AND SAFELY USE THE TOOL. In the Event of an emergency, immediately contact the First Aid assistant in the CEME Building and the course instructor(s) Contact information Course Instructors : Pierre Bérubé (604) 822-5665 CEME 2034 Leo Stocco (604) 822-0166 KAIS 3026 IGEN Program Administrative Assistant: Michelle Tierney (604) 822-9787 3rd fl, Forward Building University Safety/Emergencies Telephone (604) 822-4444


GENERAL TIPS AND GUIDELINES ON HOW TO USE VARIOUS HAND AND POWER TOOLS general safety points ......................................................................................................... 3 slips, trips and falls ........................................................................................................... 4 what are some basic tips when using hand tools? .......................................................... 7 what should i know about hand saws?............................................................................ 9 what are some general safety tips to know when using clamps? ................................ 11 what are some general safety tips to know when using cutting tools? ....................... 13 what are some safety tips to know when using a hammer? ........................................ 14 what are some safety tips to know when using pliers and wire cutters? ................... 16 what are some general safety tips to know when using screwdrivers? ...................... 18 what are some safety tips to know when using snips? ................................................. 20 what are some safety tips to know when using a struck tool? .................................... 22 what should i know about using a vise?........................................................................ 24 what are some safety tips to know when using a wood chisel? ................................... 26 what kinds of wrenches are there? ................................................................................ 28 basic tips to know when using metalworking machines?............................................ 32 when and how should you inspect powered hand tools? ............................................. 34 drill presses ...................................................................................................................... 38 Additional information ac be found at http://www.ccohs.ca/oshanswers/safety_haz/ Remember: If you are faced with a situation where you need to use a tool for which you have not received proper training to use, or a situation where you need to use a tool for a purpose that you are not familiar with, then STOP. OBTAIN ASSISTANCE FROM THE COURSE INSTRUCTOR(S) ON HOW TO PROPERLY AND SAFELY USE THE TOOL.


General Safety Points

• If in doubt, DON’T DO IT, ask for help. • If you think pieces of equipment or tools are not safe, do not use them.

Contact one of the course instructors. • Inform one of the course instructors if a piece of equipment or tool

needs repair. • Do not use dull or poorly sharpened drills. Inform one of the course

instructors and the equipment will be serviced. • Remover sharp edges with a file as soon as possible. • Always securely clamp your job when drilling whether using a press

or not. • Tie back longer hair and loose clothing when using power tools. • Always wear safety glasses when you are in the work area, even if

someone else is using the tools. • Know where the first aid kits are located. • Know where to get first aid treatment. If someone needs assistance on

campus phone 2-4444 • Report ALL accidents. You will not get in trouble. • Sweep up cuttings; do not blow them off with an air hose. • Keep your workspace clean, this includes benches and floors. • No open toed shoes allowed in labs • No food allowed in labs


SLIPS, TRIPS AND FALLS In Canada some sixty thousand workers get injured annually due to fall accidents. This number represents about fifteen percent of the "time-loss injuries" that were accepted by workers' compensation boards or commissions across Canada. Not mentioning a great economical loss, it amounts for a lot of pain and suffering and sometimes (much too often) even death. All these, in most of cases, do not have to happen. What is needed is:

• understanding how fall accidents happen, • identifying the trouble areas, and • eliminating or minimizing hazards of falling.

How do falls happen?

Statistics show that the majority (60 percent) of falls happen on the same level resulting from slips and trips. The remaining 40 percent are falls from a height. This document will summarize information on "falls on the same level" (slips and trips). Falls from an elevation, such as falls from ladders, roofs, down stairs or from jumping to a lower level, etc., will discussed in another document since each type of fall requires different features in a fall prevention program.

Slips

Slips happen where there is too little friction or traction between the footwear and the walking surface. Common causes of slips are:

• wet or oily surfaces, • occasional spills, • weather hazards, • loose, unanchored rugs or mats, and • flooring or other walking surfaces that do not have same degree of traction in

all areas.

Trips

Trips happen when your foot collides (strikes, hits) an object causing you to lose the balance

and, eventually fall. Common causes of tripping are:

• obstructed view, • poor lighting, • clutter in your way, • wrinkled carpeting, • uncovered cables, • bottom drawers not being closed, and • uneven (steps, thresholds) walking surfaces.


How to prevent falls due to slips and trips?

Both slips and trips result from some a kind of unintended or unexpected change in the contact between the feet and the ground or walking surface. This shows that good housekeeping, quality of walking surfaces (flooring), selection of proper footwear, and appropriate pace of walking are critical for preventing fall accidents.

Housekeeping

Good housekeeping is the first and the most important (fundamental) level of preventing falls due to slips and trips. It includes:

• cleaning all spills immediately, • marking spills and wet areas, • mopping or sweeping debris from floors, • removing obstacles from walkways and always keeping them free of clutter, • securing (tacking, taping, etc.) mats, rugs and carpets that do not lay flat, • always closing file cabinet or storage drawers, • covering cables that cross walkways, • keeping working areas and walkways well lit, • replacing used light bulbs and faulty switches.

Without good housekeeping practices, any other preventive measures such as installation of sophisticated flooring, specialty footwear or training on techniques of walking and safe falling will never be fully effective.

For more information about effective housekeeping visit our web-page Workplace Housekeeping - Basic Guide.

Flooring

Changing or modifying walking surfaces is the next level of preventing slip and trips. Recoating or replacing floors, installing mats, pressure-sensitive abrasive strips or abrasive-filled paint-on coating and metal or synthetic decking can further improve safety and reduce risk of falling. However, it is critical to remember that high-tech flooring requires good housekeeping as much as any other flooring. In addition, resilient, non-slippery flooring prevents or reduces foot fatigue and contributes to slip prevention measures.

Footwear

In workplaces where floors may be oily or wet or where workers spend considerable time outdoors, prevention of fall accidents should focus on selecting proper footwear.Since there is no footwear with anti-slip properties for every condition, consultation with manufacturers' is highly recommended.

Properly fitting footwear increases comfort and prevents fatigue which, in turn, improves safety for the employee. For more information on footwear visit our web-page Foot safety.


What can you do to avoid falling at work?

It is important remembering that safety is everybody business. However, it is employers' responsibility to provide safe work environment for all employees. Employees can improve their own safety too.

You can reduce the risk of slipping on wet flooring by:

• taking your time and paying attention to where you are going, • adjusting your stride to a pace that is suitable for the walking surface and the

tasks you are doing, • walking with the feet pointed slightly outward, and • making wide turns at corners.

You can reduce the risk of tripping by:

• always using installed light sources that provide sufficient light for your tasks or,

• using a flashlight if you enter a dark room where there is no light, and • ensuring that things you are carrying or pushing do not prevent you from

seeing any obstructions, spills, etc.


WHAT ARE SOME BASIC TIPS WHEN USING HAND TOOLS?

• Select the right tool for the job. Substitutes increase the chance of having an accident.

• Use tools designed to allow wrist to stay straight. Avoid using hand tools with your wrist bent.

• Ensure that employees are properly trained in the safe use of hand tools. • Use good quality tools. • Keep tools in good condition at all times. • Inspect tools for defects before use. Replace or repair defective tools. • Keep cutting tools sharp and cover sharp edges with suitable covering to

protect the tool and to prevent injuries from unintended contact. . • Replace cracked, splintered, or broken handles on files, hammers,

screwdrivers, or sledges. • Ensure that the handles of tools like hammers and axes fit tightly into the

head of the tool. • Replace worn jaws on wrenches, pipe tools and pliers. • Redress burred or mushroomed heads of striking tools. • Pull on a wrench or pliers. Never push unless you hold the tool with your palm

open. • Point sharp tools (e.g., saws, chisels, knives) laying on benches away from

aisles and handles should not extend over the edge of the bench top. • Maintain tools carefully. Keep them clean and dry, and store them properly

after each use. • Carry tools in a sturdy tool box to and from the worksite. • Wear safety glasses or goggles and well-fitting gloves appropriate for the

hazards to which you may be exposed when doing various tasks. • Keep the work environment clean and tidy to avoid clutter which may cause

accidents. • Use a heavy belt or apron and hang tools at your sides, not behind your back.

Keep the work environment clean and tidy to avoid clutter which may cause accidents

Use a heavy belt or apron and hang tools at your sides, not behind your back

What should I avoid when using hand tools?


• Do not use tools for jobs they are not intended to do. For example, do not use a slot screw drivers as a chisel, pry bar, wedge or punch or wrenches as hammers..

• Do not apply excessive force or pressure on tools. • Do not cut towards yourself when using cutting tools. • Do not hold the stock in the palm of your hand when using a cutting tool or a

screwdriver. • Do not wear bulky gloves to operate hand tools. • Do not throw tools. Hand them, handle first, directly to other workers. • Do not carry tools in a way that interferes with using both hands on a ladder,

while climbing on a structure, or when doing any hazardous work. If working on a ladder or scaffold, tools should be raised and lowered using a bucket and hand line.

• Do not carry a sharp tool in your pocket.


WHAT SHOULD I KNOW ABOUT HAND SAWS? Saws are made in various shapes and sizes and for many uses. Use the correct saw for the job.

• Wear safety glasses or a faceshield. • Select a saw of proper shape and size for stock being used. • Choose a saw handle that keeps wrist in a natural position in the horizontal

plane. • Choose saw with a handle opening of at least 12 cm (5 in.) long and 6 cm

(2.5 in.) wide and slanted at a 15° angle.

mage: IMAGE 1

• Check the stock being cut for nails, knots, and other objects that may damage or buckle saw.

• Start the cut by placing your hand beside the cut mark with your thumb upright and pressing against blade. Start cut carefully and slowly to prevent blade from jumping. Pull upward until blade bites. Start with partial cut, then set saw at proper angle.

• Apply pressure on downstroke only.

• Hold stock being cut firmly in place. • Use a helper, a supporting bench or vise to support long stock if required.


• Keep teeth and blades properly set. • Protect teeth of saw when not in use. • Keep saw blades clean.

What should I know about using a hacksaw?

• Select correct blade for material being cut. • Secure blade with the teeth pointing forward. • Keep blade rigid, and frame properly aligned. • Cut using strong, steady strokes, directed away from yourself. • Use entire length of blade in each cutting stroke. • Use light machine oil on the blade to keep it from overheating and breaking.

• Cut harder materials more slowly than soft materials. • Clamp thin, flat pieces requiring edge cutting. • Keep saw blades clean and lightly oiled.

Refer to OSH Answers General Hand Tool Operation for more tips.


WHAT ARE SOME GENERAL SAFETY TIPS TO KNOW WHEN USING CLAMPS? Clamps are versatile tools that serve to temporarily hold work securely in place. They are used for many applications including carpentry, woodworking, furniture making, welding, construction and metal working.

Clamp styles include C-clamps, bar clamps, pipe clamps, and handscrews. Bar clamps have adjustable arms that are easily widened or narrowed to fit the work piece and, therefore, requires fewer turns of the screw spindle, compared to a C-clamp, to hold the piece tightly.

DO

• Wear safety glasses or a faceshield. • Select the proper clamp style and size by matching the work-holding

requirements of the job with the following clamp features:

- strength and weight (e.g., consider rail size and nominal clamping pressure) - opening (length of reach) - throat depth (depth of reach) - ease of adjustment - clamping surfaces (material used and size)

• Ensure that the swivel at the end of the screw turns freely before using.

• Dispose of clamps with bent frames; replace bent spindles, if possible.

• Ensure that the pressure plate and anvil parts of the clamp are in full contact with the workpiece before tightening.

• Use pads with C-clamps to avoid marking the work.

• Remove clamps as soon as the job is finished. Clamps serve only as temporary devices for holding work securely in place.

• Keep all moving parts of clamps lightly oiled and keep tools clean to prevent slippage. Also make sure there is no dirt or oil on any part that will come in to contact with the work.

• Store C-clamps by clamping them in a rack, not in a drawer.

What should I avoid doing?


• Do not use extra large clamps just for the sake of their large throats. Instead, use, deep-throat clamps.

• Do not use any clamps that have a bent frame or a bent spindle.

• Do not use wrenches, pipes, hammers, or pliers to tighten clamps. Use wrenches only on clamps especially designed for wrenches.

• Do not hoist or pull with C-clamps. Use special lifting clamps.

• Do not use C-clamps to construct scaffolds or platforms for workers.


WHAT ARE SOME GENERAL SAFETY TIPS TO KNOW WHEN USING CUTTING TOOLS? Many types and sizes of cutters are used for cutting selected metal products made from iron, steel, or softer, non-ferrous materials (e.g., copper, brass, aluminum). Cutters are designed to cut materials of different kinds of products such as wires, cables (electrical, coax, multi-strand), wire ropes, fencing, bolts, rods, pre-stressed concrete wires, and strapping.

DO

• Wear safety glasses or a faceshield and protective gloves when using cutters.

• Choose the proper cutter for the job. Cutters are designed for a specific type, hardness, and size of material.

• Cut materials straight across - keep the material being cut at right angles to the cutting edges of jaws.

• Prevent injury from flying metal by wrapping a burlap bag, cloth or rag around the cutting jaws. Metal can fly when cut. The harder the metal, the farther it will fly.

• Warn those in the area to take precautionary measures to avoid possible injury from flying metal pieces.

• Keep cutting tools in good repair.

• Adjust and lubricate cutter and moving parts daily if heavily used.

• Sharpen jaws according to manufacturers' instructions.


• Do not use a cutting tool until you are trained in its proper and safe use. • Do not use cushion grip handles for jobs requiring insulated handles. Cushion

grips are for comfort primarily and do not protect against electric shock. • Do not use cutters which are cracked, broken or loose. • Do not exceed the recommended capacity of a tool. • Do not cut diagonally. • Do not rock cutters from side to side when cutting wire. • Do not pry or twist with tool when cutting. • Do not hammer on cutting tools or extend the handle length to achieve

greater cutting power. • Do not expose cutters to excessive heat.

.


WHAT ARE SOME SAFETY TIPS TO KNOW WHEN USING A HAMMER? Hammers and other striking tools are widely used and often abused. Hammers are made for specific purposes in various types and sizes, and with striking surfaces of varying hardness. For example, hammers are used for general carpentry, framing, nail pulling, cabinet making, assembling furniture, upholstering, finishing, riveting, bending or shaping metal, striking masonry drill and steel chisels, and so on. Hammers are designed according to the intended purpose.

• Select a hammer that is comfortable for you and that is the proper size and weight for the job. Misuse can cause the striking face to chip, possibly causinga serious injury.

• Choose a hammer with a striking face diameter approximately 12 mm (0.5 inch) larger than the face of the tool being struck (e.g., chisels, punches, wedges, etc.).

• Ensure that the head of the hammer is firmly attached to the handle. • Replace loose, cracked or splintered handles. • Discard any hammer with mushroomed or chipped face or with cracks in the

claw or eye sections. • Wear safety glasses or a faceshield. • Strike a hammer blow squarely with the striking face parallel to the surface

being struck. Always avoid glancing blows and over and under strikes. (Hammers with bevelled faces are less likely to chip or spall.)

• Look behind and above you before swinging the hammer. • Watch the object you are hitting. • Hold the hammer with your wrist straight and your hand firmly wrapped

around the handle



• Do not use a hammer with a loose or damaged handle. • Do not use handles that are rough, cracked, broken, splintered, sharp-edged

or loosely attached to head. • Do not use any hammer head with dents, cracks, chips, mushrooming, or

excessive wear. • Do not use a hammer for any purpose for which it was not designed or

intended. • Do not use one hammer to strike another hammer, other hard metal objects,

stones or concrete. • Do not redress, grind, weld or reheat-treat a hammer head. • Do not strike with the side or cheek of the hammer.


WHAT ARE SOME SAFETY TIPS TO KNOW WHEN USING PLIERS AND WIRE CUTTERS? Pliers are made in various shapes and sizes and for many uses. Some are used for gripping something round like a pipe or rod, some are used for twisting wires, and others are designed to be used for a combination of tasks including cutting wire. There are also tools that are used just for cutting wires (as opposed to wire cable and rope). Use the correct pliers or wire cutters for the job.

DO

• Wear safety glasses or a faceshield where there is a hazard from flying particles, pieces of wire, etc.

• Cut at right angles. Never rock the cutting tool from side to side or bend wire back and forth against the cutting edges.

• Choose pliers or wire cutters that have a grip span of 6 cm - 9 cm (2 1/2 - 3 1/2 in.) to prevent your palm or fingers from being pinched when the tools are closed.

• Use adjustable pliers that allow you to grip the workpiece firmly while maintaining a comfortable handgrip (i.e., hand grasp is not too wide).

• Use tools only if they are in good condition. • Make sure that the cutting edges are sharp. Dull and worn down cutting

edges require many times more force needed for cutting. • Make sure that the toothed jaws are clean and sharp. Greasy or worn down

jaws can result in compromised safety. Such tools also require increased forceto hold the workpiece which, in turn, increases the risk of muscular fatigue and repetitive strain injuries.

• Oil pliers and wire cutters regularly. A drop of oil on the hinge will make the tools easier to use.

• Pull on the pliers; do not push away from you when applying pressure. If the tools slips unexpectedly, you may lose your balance or hit your hand against equipment or something else hard that could result in an injury.


• Do not cut hardened wire unless the pliers or wire cutters are specifically


manufactured for this purpose. • Do not expose pliers or wire cutters to excessive heat. • Do not bend stiff wire with light pliers. Needle nose pliers can be damaged by

using the tips to bend large wire. Use a sturdier tool. • Do not use pliers as a hammer. • Do not hammer on pliers or wire cutters to cut wires or bolts. • Do not extend the length of handles to gain greater leverage. Use a larger

pair of pliers for gripping or a bolt cutter for cutting. • Do not use cushion grip handles for jobs requiring tools with electrically

insulated handles. Cushion grips are for comfort primarily and do not protect against electric shock.

• Do not use pliers on nuts and bolts; use a wrench.


WHAT ARE SOME GENERAL SAFETY TIPS TO KNOW WHEN USING SCREWDRIVERS? Screwdrivers are made in various shapes and sizes and for many uses. Use the correct screwdriver for the job.

• Choose contoured handles that fit the shank tightly, with a flange to keep the hand from slipping off the tool.

• Use a slot screwdriver with a blade tip width that is the same as the width of slotted screw head.

• For cross head screws, use the correct size and type of screwdriver: a Phillips screwdriver may slip out of a screw head designed for use with the slightly, flatter-tipped Pozidriv screwdriver.

• Use a vise or clamp to hold the stock if the piece is small or moves easily. • Wear safety glasses or a faceshield that is appropriate for the hazards of the

work you are doing. • Keep the screwdriver handle clean. A greasy handle could cause an injury or

damage from unexpected slippage.. • Shut off electricity before beginning work on electrical equipment (lock out,

de-energize and tag out). • If work must be carried out on "live" equipment, use screwdrivers that have

insulated handles designed for electrical work and a non-conducting shaft. Remember, most plastic handles are designed for grip and comfort.

• Use non-magnetic tools when working near strong magnets (e.g., in some laboratories).

• Use a screw-holding screwdriver (with screw-holding clips or magnetic blades) to get screws started in awkward, hard-to-reach areas. Square-tipped screwdrivers (e.g., Robertson) that hold screws with recessed square holes are also useful in such situations.

• Use an offset screwdriver in close quarters where a conventional screwdriver cannot be used.

Offset Screwdriver

• Use a screwdriver that incorporates the following features when continuous work is needed:

o a pistol grip to provide for a straighter wrist and better leverage,

o a "Yankee drill" mechanism (spiral ratchet screwdriver or push screwdriver) which rotates the blade when the tool is pushed forward,

o a ratchet device to drive hard-to-move screws efficiently,

o or use a powered screwdriver.


Yankee Drill Mechanism with a Pistol Grip

• File a rounded tip square making sure the edges are straight. A dull or rounded tip can slip out of the slot and cause hand injury or damage to materials.

• Store screwdrivers in a rack or partitioned pouch so that the proper screwdriver can be selected quickly.


• Do not lean or push on a screw-driver with any more force than necessary to keep contact with the screw. A screw properly piloted and fitted will draw itself into the right position when turned. Keep the shank directly over the screw being driven.

• Do not hold the stock in one hand while using the screwdriver with the other. If the screwdriver slips out of the slot you may cut your hand.

• Do not hammer screws which cannot be turned. • Do not grind the tip to fit all sizes of screw heads. • Do not try to use screwdrivers on screw heads for which they are not

designed (e.g., straight blade screwdrivers on Phillips, clutch head, Torx or multi-flutted spline screw heads).

• Do not use defective screwdrivers (i.e., ones with rounded or damaged edges or tips; split or broken handle; or bent shaft).

• Do not use a screwdriver for prying, punching, chiseling, scoring, scraping or stirring paint.

• Do not use pliers on the handle of a screwdriver for extra turning power. A wrench should only be used on the square screwdriver shank designed for that purpose.

• Do not expose a screwdriver blade to excessive heat. Heat can affect the temper of the metal and weaken the tool.

• Do not use a screwdriver to check if an electrical circuit is live. Use a suitable meter or other circuit testing device.

• Do not carry screwdrivers in your pockets.


WHAT ARE SOME SAFETY TIPS TO KNOW WHEN USING SNIPS? Snips are made in various shapes and sizes for various tasks. The handle can be like those on scissors with finger and thumb holes or like plier handles. Models are available for cutting in straight lines, in curves to the left or curves to the right.

• Universal snips can cut in both straight and wide curves. • Straight snips and duckbill snips (flat blade, "perpendicular" to the handle,

with pointed tips) are designed to cut in straight lines; some duckbill snips are designed for cutting curved lines.

• Hawk's bill snips (with crescent-shaped jaws) are used for cutting tight circles.

• Aviation snips have compound leverage that reduces the effort required for cutting.

• Offset snips have jaws that are set at an angle from the handle.

DO

• Select the right size and type of snips for the job; check the manufacturer's specifications about the intended use of the snips (e.g., type of cut - straight, wide curve, tight curve, right or left, and maximum thickness and kind of metal or other material that can be cut).

• Only use snips that are sharp and in good condition. • Wear safety glasses or a faceshield and protective gloves when working with

snips. Small pieces of metal may go flying in the air and cut edges of metal are sharp.

Left cut snips are for making cuts to the left and straight cuts.

Right cut snips are for making straight cuts and cuts to the right.

Straight cut snips (not shown) are for making straight cuts and shallow cuts to the right or left.


Offset snips permit you to keep your hands safely above the cut while cutting directly through the centre of a large sheet.

• Use snips for cutting soft metal only. Hard or hardened metal should be cut with cutting tools designed for that purpose.

• Use ordinary hand pressure for cutting. If extra force is needed, use a larger tool.

• Cut so that the waste is on the right if you are right-handed or on the left if you are left-handed.

• Avoid springing the blades. This results from trying to cut metal that is too thick or heavy for the snips you are using.

• Keep the nut and the pivot bolt properly adjusted at all times. • Oil the pivot bolt on the snips occasionally.


• Do not try to cut sharp curves with straight cut snips. • Do not cut sheet metal thicker than the manufacturer's recommended upper

limit (e.g., cuts up to 16 gauge cold rolled steel or 18 gauge stainless steel). • Do not extend the length of handles to gain greater leverage. • Do not hammer or use your foot to exert extra pressure on the cutting edges. • Do not use cushion grip handles for tasks requiring insulated handles. They

are for comfort primarily and not for protection against electric shocks. • Do not attempt to resharpen snips in a sharpening device designed for

scissors, garden tools or cutlery.


WHAT ARE SOME SAFETY TIPS TO KNOW WHEN USING A STRUCK TOOL? Struck tools are made in various shapes and sizes and for many uses and include cold chisels, punches, nail sets, rock and star drills, and wedges. Use the correct tool for the job.

DO

• Wear safety glasses or a faceshield. • Use the tools only if they are good condition (i.e., cutting edges are sharp,

struck head is not mushroomed or chipped). • Hold the chisel, for shearing and chipping, at an angle which permits the

bevel of the cutting edge to lie flat against the shearing plane. • Provide hand protection

• Hand protection can be provided by a sponge rubber shield forced onto the shaft of a chisel or select struck tools that come with hand protectors designed for the tool.

• Punch and chisel holders are also available. • Discard tools which are bent, cracked or chipped. • Redress striking tools with burred or mushroomed heads.


• Redress the point or cutting edge to its original shape. Grind to a slightly convex cutting edge. The point angle of the chisel should be 70° for hard metals, 60° for soft.


• Do not use stuck tools if the struck end is chipped or mushroomed. • Do not use stuck tools if the cutting edge is dull or chipped or if the point of a

punch is slanted or damaged. • Do not apply too much pressure to the head when grinding a chisel. The heat

generated can remove the temper. Immerse the chisel in cold water periodically when grinding.

• Do not use cold chisels for cutting or splitting stone or concrete. • Do not use a drift pin punch (also called an aligning punch) as a pin punch

intended for driving, removing, or loosening pins, keys, and rivets. • Do not allow bull point chisels to be hand-held by one employee and struck by

another. Use tongs or a chisel holder to guide the chisel so that the holder's hand will not be injured.


WHAT SHOULD I KNOW ABOUT USING A VISE? A vise, sometimes called the third hand, is an indispensable tool in the tool room or workshop. Vises are usually mounted on workbenches or similar firm supports to hold material in place.

Most vises can be used for a wide variety of work. Select the most suitable vise which is strong enough for the work.

DO

• Wear safety glasses or a faceshield when using striking tools or power tools on a workpiece held by a vise.

• Attach a vise securely. Place bolts in all the holes in the base of the vise. Use lock washers under the nuts.

• Mount a vise so that the stationary jaw projects slightly beyond the edge of the workbench. This allows long work to be clamped in the vise without interference from the edge of the workbench.

• Ensure that the workbench is firmly secured to its base.

• Check the vise for cracks or other damage before clamping a workpiece in it. • Use a vise large enough to hold the work without strain. • Place the workpiece in the vise so that the full clamping surface of the jaw

supports the workpiece • Keep the workpiece in the vise close as possible to the jaws to prevent

vibration when sawing, filing, etc. • Support the end of extra long work with an adjustable stand, saw horse, or

box rather than putting extra strain on the vise. • Keep all threaded and moving parts clean, oiled and free of chips and dirt. • Use jaw liners in a vise where there is any possibility of marking the work. • Replace a bent handle and worn jaw inserts.

What should I not do?


• Do not weld the base of the vise to any metal. • Do not repair a vise by welding or brazing. • Do not try to bend a heavy rod in a light vise. • Do not cut into the jaws. • Do not apply heavy pressure at the corner of the vise jaws. • Do not use a handle extension (e.g., a pipe) for extra clamping pressure. • Do not hammer on the handle to tighten beyond hand pressure. • Do not use the jaws of the vise as an anvil. • Do not use any vise that has the slightest crack. • Do not unscrew or open the jaws of the vise wider than they were designed to

be used.


WHAT ARE SOME SAFETY TIPS TO KNOW WHEN USING A WOOD CHISEL? Wood chisels are made in various shapes and sizes and for many uses. Use the correct chisel for the job.

DO

• Wear safety glasses or a faceshield. • Use the right size of chisel for the job. • Choose smooth, rectangular handles that have no sharp edges and are

attached firmly to the chisel.

• Ensure that the cutting edge is sharp. Dull chisels can be difficult to control and require more effort to do the job.

• Check stock thoroughly for knots, staples, nails, screws or other foreign objects before chiseling.

• Clamp stock so it cannot move.

• Adjust your stance so that you do not lose your balance if the tool slips. • Chip or cut away from yourself. • Keep your hands and body behind the cutting edge. • Use a wooden or plastic mallet with a large striking face on all chisels. Only

heavy-duty or framing chisels are made of a solid or molded handle that can be struck with a steel hammer.

• Make finishing or paring cuts with hand pressure alone. • Place chisels safely within the plastic protective caps to cover cutting edges

when not in use. • Replace any chisel that is bent or shows dents, cracks, chips, or excessive

wear. • Store chisels in a "storage roll," a cloth or plastic bag with slots for each

chisel, and keep them in a drawer or tray. • Replace broken or splintered handles. • Sharpen cutting edges as often as necessary.


• Do not use a wood chisel as a pry or a wedge. • Do not use a wood chisel on metal. • Do not use an all-steel chisel with a mushroomed face or a chipped edge.

Redress with a file or whetstone.


• Do not use a grinder to redress heat-treated tools. Use a whetstone. • Do not use a dull chisel.


WHAT KINDS OF WRENCHES ARE THERE? Wrenches are made in various shapes and sizes and are used for gripping, fastening, turning, tightening and loosening things like pipes, pipe fittings, nuts and bolts. There basically two major kinds of wrenches:

• pipe wrenches used in plumbing for gripping round (cylindrical) things and • general use wrenches used on nuts and bolts that have flat, parallel surfaces;

e.g., square or hexagonal (hex).

Wrenches may be adjustable to fit different sized pipes, nuts and bolts or may be a fixed size.

What are some examples of adjustable wrenches?

Adjustable wrenches include:

• pipe wrenches, • Crescent (TM) wrenches which have adjustable jaws set at a 30 degree angle

from the handle. Although Crescent is a trade name, it is widely used to refer to any regular adjustable wrench with an angled jaw regardless of who manufactured it.

• Monkey wrenches which have their adjustable head at a 90 degree angle from the handle.

What are some examples of fixed-size wrenches?

Fixed-sized wrenches include:

• open ended wrenches that have "jaws" with parallel sides or tines that fit snugly on nuts and bolts

• closed end or box wrenches that have a loop at the end with notches on the inside that allow the wrench to fit either square or hex nuts or both (depending on the number of notches or points).

• combination wrenches that have both an open end and a closed end on either end of the wrench; usually they fit the same size nut or bolt.

• socket wrenches are like closed end wrenches except they are cylindrical in shape. They can fit over a nut in a recessed hole that would be inaccessible with open or closed ended wrenches. These have an offset handle at right angles to the nut being tightened or loosened. Usually the handle is a ratchet-type handle that allows the user to turn the socket continuously in one direction by moving the handle back and forth without having to take the socket off the nut.

• torque wrenches, one type of socket wrenches, have a built-in spring-loaded indicator that shows how much torque being is being applied (i.e., shows how hard the nut is being tightened).

• Nut drivers, another type of socket wrenches, are sockets that can be snapped on or permanently fixed to a screwdriver-type handle.


• Allen wrenches or Allen keys are hexagon-shaped (six-sided) metal shafts that are bent into an L-shape for leverage. Hex drivers are "straight Allen wrenches" that have a screwdriver-type handle. These are different from the other wrenches since they fit inside a recessed hexagonal hole in screw heads instead of around a nut or bolt.

Fixed wrenches fit single, specific sizes. Metric wrench sizes are expressed as whole numbers (e.g., 8, 10, 14, 32) that correspond to the sizes in millimetres. Non-metric sizes used widely in the U.S. are also called S.A.E (Society of Automotive Engineers) sizes and are expressed as fractions of an inch; e.g., 1/4, 1/2, 3/4, 1 1/4. Since both metric and S.A.E. fasteners (nuts, bolts, etc.) are used in Canada, users must select the correct type and size of wrench to prevent injuries and damage to equipment in case of slippage when force is applied to the wrench.

What are general safety tips when using wrenches?

• Use the correct wrench for the job - pipe wrenches for pipes plumbing fittings, and general use wrenches for nuts and bolts.

• Discard any damaged wrenches (e.g., open ended wrenches with spread jaws or box wrenched with broken or damaged points).

• Select the correct jaw size to avoid slippage. • Wear safety glasses or a faceshield where there is a likely hazard of flying

particles or falling debris. • Position your body in a way that will prevent you from losing balance and

hurting yourself if the wrench slips or something (e.g., a bolt) suddenly breaks.

• Use a box or socket wrench with a straight handle, rather than an off-set handle, when possible.

• Ensure that the jaw of an open ended wrench is in full contact (fully seated, "flat", not tilted) with the nut or bolt before applying pressure.

• When turning with an adjustable wrench, the direction of the turn should be against (towards) the permanent jaw.

• Ensure that the teeth of a pipe wrench are sharp and free of oil and debris and that the pipe or fitting is clean to prevent unexpected slippage and possible injuries.

• Apply a small amount of pressure to a ratchet wrench initially to ensure that the ratchet wheel (or gear) is engaged with the pawl (a catch fitting in the gear) for direction you are applying pressure.

• Support the head of the ratchet wrench when socket extensions are used. • Pull on a wrench using a slow, steady pull; do not use fast, jerky movements.


• Stand aside when work is done with wrenches overhead. • Make sure adjustable wrenches do not "slide" open during use. • Keep tools well maintained (cleaned and oiled). • Clean and place tools and wrenches in a tool box, rack or tool belt after use.

What should I avoid doing when using wrenches?

• Do not use push on a wrench - losing your balance is more likely if the wrench slips.

• Do not use a wrench that is bent handle or damaged. • Do not use worn adjustable wrenches. Inspect the knurl, jaw and pin for

wear. • Do not pull on an adjustable wrench that is loosely adjusted. • Do not use pipe wrenches on nuts or bolts. • Do not use pipe wrenches for lifting or bending pipes. • Do not use a wrench on moving machinery. • Do not use the wrong tools for the job. Never use pliers instead of a wrench

or a wrench as a hammer. • Do not use a make-shift wrench. • Do not insert a shim in a wrench for better fit. • Do not strike a wrench (except a "strike face" wrench) with a hammer, or

similar object, to gain more force.


• Do not increase the leverage by adding sleeved additions (e.g., a pipe) to increase tool handle length.

• Do not expose a wrench to excessive heat (like from a blow torch) that could affect the temper of the metal and ruin the tool.


BASIC TIPS TO KNOW WHEN USING METALWORKING MACHINES? Metalworking machines can be dangerous if not used properly. Read the owner's manuals carefully. Make sure you receive complete instructions and are properly trained before using any tool or machine.

• Check and adjust all safety devices before each job. • Ensure that the guards are in position and in good working condition before

operating. • Ensure that all stationary equipment is anchored securely to the floor. • Ensure all machines have a start/stop button within easy reach of the

operator. • Each machine should have only one operator at one time. However, everyone

should know how to stop the machine in an emergency. • Ensure that keys and adjusting wrenches have been removed from the

machine before turning on the power. Provide a convenient tool rack. • Ensure that all cutting tools and blades are clean and sharp. They should be

able to cut freely without being forced. • Stop the machine before measuring, cleaning or making any adjustments. • Use a vacuum, brush or rake to remove cuttings. Do not handle cuttings by

hand because they are very sharp. • Keep hands away from the cutting head and all moving parts. • Avoid awkward operations and hand positions. A sudden slip could cause the

hand to move into the cutting tool or blade. • Return all portable tooling to their proper storage place after use. • Clean all tools after use. • Keep work area clean, well swept, and well lit. Floors should be level and

have a non-slip surface. • Ensure there is enough room around the machine to do the job safely. • Obtain first aid immediately for all injuries. • Understand that the health and fire hazards can vary from material to

material. Make sure all appropriate precautions are taken.

What should you avoid doing when using metalworking machines?

• Do not distract an operator. Horseplay can lead to injuries and should be strictly prohibited.

• Do not wear loose clothing, gloves, neckties, rings, bracelets or other jewelry that can become entangled in moving parts. Confine long hair.

• Do not remove cuttings by hand. Wait until the machine has stopped running to clear cuttings with a vacuum, brush or rake.

• Do not leave machines running unattended. Turn power off. • Do not free a stalled cutter without turning the power off first. • Do not clean hands with cutting fluids. • Do not use rags near moving parts of machines. • Do not use compressed air to blow debris from machines or to clean dirt from

clothes.


Refer to OSH Answers "Powered hand tools", "Hand Tools", and "Abrasive Wheels" for additional information

What personal protective equipment might I need?

• Use the appropriate safety equipment for the job. Wear CSA-certified safety glasses with side shields or goggles. Prescription eye glasses are not substitutes for safety glasses.

• Wear respiratory protection where required. • Wear hearing protection when required. If you have trouble hearing someone

speak from one metre (three feet) away, the noise level from the machine is too high. Damage to hearing may occur.


WHEN AND HOW SHOULD YOU INSPECT POWERED HAND TOOLS?

• Inspect tools for any damage prior to each use. • Check the handle and body casing of the tool for cracks or other damage. • If the tool has auxiliary or double handles, check to see that they installed

securely. • Inspect cords for defects: check the power cord for cracking, fraying, and

other signs of wear or faults in the cord insulation. • Check for damaged switches and ones with faulty trigger locks. • Inspect the plug for cracks and for missing, loose or faulty prongs.

What should you do if you find a tool defective?

• If a tool is defective, remove it from service, and tag it clearly "Out of service for repair".

• Replace damaged equipment immediately - do not use defective tools "temporarily".

• Have tools repaired by a qualified person - do not attempt field repairs.

What should you do before using powered hand tools?

• Ensure that you have been properly trained to use the tool safely. Read the operator's manual before using the tool and operate the tool according to the manufacturer's instructions.

• Ensure that the power tool has the correct guard, shield or other attachment that the manufacturer recommends.

• Prevent shocks. Ensure that the tools are properly grounded using a three-prong plug, are double-insulated (and are labelled as such), or are powered by a low-voltage isolation transformer: this will protect users from an electrical shock.

• Check electric tools to ensure that a tool with a 3-prong plug has an approved 3-wire cord and is grounded. The three-prong plug should be plugged in a properly grounded 3-pole outlet. If an adapter must be used to accommodate a two-hole receptacle, the adapter wire must be attached to a known, functioning ground. Never remove the third, grounding prong from a plug.

• Replace open front plugs with dead front plugs. Dead front plugs are sealed and present less danger of shock or short circuit.

• Have a qualified electrician install a polarized outlet if the polarized, two-prong plug of a double-insulated tool does not fit in a two-hole receptacle. Double insulated tools use plugs having one prong that is visibly wider than


the other. If the plug does not fit in a receptacle after reversing the plug, the wall receptacle may be an older, non-polarized type. These can only accommodate plugs with two prongs that are the same width.

• Test all tools for effective grounding with a continuity tester or a ground fault circuit interrupter (GFCI) before use.

• Use only the kind of battery that the tool manufacturer specifies for the battery-powered tool that you are using.

• Recharge a battery-powered tool only with a charger that is specifically intended for the battery in that tool.

• Remove the battery from the tool or ensure that the tool is switched off or locked off before changing accessories, making adjustments, or storing the tool.

• Store a battery pack safely so that no metal parts, nails, screws, wrenches and so on can come in contact with the battery terminals; this could result in shorting the battery and possibly cause sparks, fires or burns.

What should you do while using powered hand tools?

• Wear or use personal protective equipment (PPE) or clothing that is appropriate for the work you are doing; this may include items such as safety glasses or goggles, hearing protection, dust mask, gloves, safety boots or shoes, or rubber boots.

• Switch off the tools before connecting them to a power supply. • If a power cord feels more than comfortably warm or if a tool is sparking

excessively, have it checked by an electrician or other qualified person. • Disconnect the power supply before making adjustments or changing

accessories. • Remove any wrenches and adjusting tools before turning on a tool. • Inspect the cord for fraying or damage before each use. Tag defective tools

clearly with an "Out of service" tag and replace immediately with a tool in good running order.

• During use, keep power cords clear of tools and the path that the tool will take.

• Use clamps, a vice or other devices to hold and support the piece being worked on, when practical to do so. This will allow you to use both hands for better control of the tool and will help prevent injuries if a tool jams or binds in a work piece.

• Use only approved extension cords that have the proper wire size for the length of cord and power requirements of the electric tool that you are using. This will prevent the cord from overheating.

• For outdoor work, use outdoor extension cords marked "W-A" or "W". • Suspend power cords over aisles or work areas to eliminate stumbling or

tripping hazards. • Eliminate octopus connections: if more than one receptacle plug is needed,

use a power bar or power distribution strip that has an integral power cord and a built-in overcurrent protection.

• Pull the plug, not the cord when unplugging a tool. Pulling the cord causes wear and may adversely affect the wiring to the plug - an electrical shock to the operator may result.

• Follow good housekeeping procedures - keep the work area free of clutter and debris that could be tripping or slipping hazards.


• Keep power cords away from heat, water, oil, sharp edges and moving parts. They can damage the insulation and cause a shock.

• Ensure that cutting tools, drill bits, etc. are kept sharp, clean and well maintained.

• Store tools in a dry, secure location when they are not being used.

What should you avoid when using powered tools?

• Do not wear gloves, loose clothing or jewelry while using revolving power tools. Tie back long hair or wear appropriate hair protection to prevent hair from getting caught in moving parts of equipment.

• Do not use a tool unless you have been trained to use it safely and know its limitations and hazards.

• Avoid accidental starting by ensuring the tool is turned off before you plug it in. Also do not walk around with a plugged-in tool with your finger touching the switch.

• Do not bypass the ON/OFF switch and operate the tools by connecting and disconnecting the power cord.

• Do not disconnect the power supply of the tool by pulling or jerking the cord from the outlet.

• Do not leave a running tool unattended. Do not leave it until it has been turned off, has stopped running completely, and has been unplugged.

• Do not use electric tools in wet conditions or damp locations unless tool is connected to a ground fault circuit interrupter (GFCI).

• Do not expose electric power tools to rain or wet conditions; wet tools increase the likelihood for getting an electric shock.

• Avoid body contact with grounded surfaces like refrigerators, pipes and radiators when using electric powered tools; this will reduce the likelihood of shock if the operator's body is grounded.

• Do not plug several power cords into one outlet by using single-to-multiple outlet adapters or converters ("cube taps").

• Do not use light duty power cords.

• Do not connect or splice extension cords together to make a longer connection: the resulting extension cord may not be able to provide sufficient current or power safely.

• Do not carry electrical tools by the power cord.

• Do not tie power cords in knots. Knots can cause short circuits and shocks. Loop the cords or use a twist lock plug.

• Never break off the third prong on a plug: replace broken 3-prong plugs and make sure the third prong is properly grounded.

• Never use extension cords as permanent wiring: use extension cords only as a temporary power supply to an area that does not have a power outlet.

• Do not walk on or allow vehicles or other moving equipment to pass over unprotected power cords. Cords should be put in conduits or protected by placing planks on each side of them.


• Do not bush away sawdust, shavings or turnings while the tool is running. Never use compressed air for cleaning surfaces or removing sawdust, metal turnings, etc.

• Do not operate tools in an area containing explosive vapours or gases. • Do not clean tools with flammable or toxic solvents. • Do not surprise or touch anyone who is operating a tool. Startling a tool

operator could end up causing an accident or injury.


DRILL PRESSES

• Read the Owners manual carefully. • Make sure you understand the instructions and are properly trained before

operating a drill press.

Refer to Metalworking Machines - General for basic safety tips. What are some safe work practices to know when using a drill press?

• Wear appropriate safety glasses. • Ensure that the drill press has a start/stop button within easy reach of the operator. • Use a vacuum, brush or rake to remove cuttings. • Remove burrs and chips from a drilled hole. When making deep holes, clean out

the hole frequently. • Use a clamp or drill vise to prevent work from spinning. • Lubricate drill bit when drilling metal. • Reduce the drilling pressure when the drill begins to break through the workpiece.

This action prevents drill from pulling into the work and breaking. • Keep drill bits clean and sharp. Dull drills are a common cause of breakage. • Keep floor around the drill press free of oil and grease. • Keep the working surface clean of scraps, tools and materials. • Keep guards in place and in good working order.

Refer to portable hand drills for additional information. What are some things you should avoid doing?

• Do not wear any loose clothing or ties. Roll sleeves above the elbow to prevent them from being caught in revolving parts. Confine long hair.

• Do not wear gloves, rings, watches, or bracelets while working with a drill press. • Do not set speeds, adjust, or measure work until machine is completely stopped. • Do not leave chuck key in drill chuck. Make adjustments and remove key

immediately. • Do not hold work by hand when drilling holes larger than 12 mm (1/2 in.) in

diameter. • Do not place hands under the stock being drilled. • Do not stop rotation of chuck and spindle with your hand. • Do not remove a broken drill with a centre punch and hammer. • Do not leave the drill press running unattended.


How do you select the proper bit or attachment?

• Follow manufacturers' instructions when selecting and using a bit or attachment, especially with unfamiliar drills or work.

• Select the bit or attachment suitable for the size of the drill and the work being done.

• Ensure that the bit or attachments are properly seated and tightened in the chuck.

• Use only bits and attachments that turn true.

• Use the auxiliary (second) handle for larger work or continuous operation.

What should you do when working with powered hand drills?

• Wear safety glasses or a face shield.

• Keep drill air vents clear to maintain adequate ventilation.

• Keep drill bits sharp always.

• Keep all cords clear of the cutting area during use. Inspect for frays or damage before each use.

• Disconnect power supply before changing or adjusting bit or attachments.

• Tighten the chuck securely. Remove chuck key before starting drill.

• Secure workpiece being drilled to prevent movement.

• Slow the rate of feed just before breaking through the surface. • Drill a small "pilot" hole before drilling large holes.

What should you do when working with small pieces?

• Clamp stock so work will not twist or spin. • Do not drill with one hand while holding the material with the other.

What should you avoid when working with powered hand drills?

• Do not use a bent drill bit. • Do not exceed the manufacturer's recommended maximum drilling capacities. • Do not use a hole saw cutter without the pilot drill. • Do not use high speed steel (HSS) bits without cooling or using lubrication.


• Do not attempt to free a jammed bit by starting and stopping the drill. Unplugthe drill and then remove the bit from the workpiece.

• Do not reach under or around stock being drilled. • Do not overreach. Always keep proper footing and balance. • Do not raise or lower the drill by its power cord.


Integrated Engineering Program Machine Shop and Labs Acknowledgement of Risk I, _, __________________ (name of student) (UBC student number) a student enrolled at the University of British Columbia (the “University”) do hereby ACKNOWLEDGE:

1. that the Integrated Engineering Program Machine Shop (Frank Forward Building Machine Shop) (the “Shop”) and Labs used for APSC 230, APSC 330, and APSC 430 (including but not limited to the MacMillan Building 76 area) (the “Labs”) are inherently dangerous places and due care and attention are required when using the facilities for my own safety and for the safety of my fellow students and Shop or Lab personnel.

2. that all students who use the Shop or Labs must have undertaken the Integrated Engineering Program Machine Shop Orientation Course (the “Orientation Course”). In particular, I am aware that it is necessary to receive appropriate instruction from qualified Shop personnel before using any Shop or Lab tool or equipment with which I am unfamiliar. Specifically, I am aware that if I am not comfortable with using the Shop machines or Lab tools, it is necessary that I go to the Frank Forward Building Machine Shop for training or assistance on how to use the machines or tools or for the Shop personnel to do the work for me.

3. that the Labs may be unsupervised. 4. that unqualified persons are not permitted in the Shop or Labs and are not permitted to

use any Shop or Lab tools or equipment. 5. that use of the Shop or Labs and of Shop or Lab tools involves exposure to certain

inherent risks, including but not limited to potential injury or death. I understand that I will be using hazardous mechanical devices including but not limited to saws, drills, lathes, mills and presses that can cause severe personal injuries.

6. that the University carries no personal property, medical, dental or any accident benefit/disability insurance on my behalf and that it is my sole responsibility to ensure that I maintain sufficient personal insurance coverage.

7. that course instructors or Shop or Lab personnel may suspend my Shop or Lab privileges at any time and at their sole discretion by giving verbal notice and such a suspension is immediately effective.

8. that I will ONLY use the Shop or Labs for the purposes of participating in and completing the Integrated Engineering Program courses APSC 230, APSC 330, or APSC 430.

Signature of Student Date

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