7/28/2019 Calculo-Seleccion-Correas

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0.0

0.1

0.1

0.2

0.00.10.20.30.4

1.2

1.

1.

1.

1. 2

1. 4

1. 5

1.6

1.8

1.9

1. 1.6 1.8 2.0

1. 1.7 1.9 2.1

1. 1.8 2.2

1. 1.9 2.3

MXL12121416--

XL1010111216-

L1212141620-

H1416182024-

S2M141416182020

S3M141416182020

S5M141620242626

S8M2224262830-

MTS8M2424242424-

T51212141620-

T101416182022-

A

B

C

D

E

! @ #

1.0

1.3

1.6

1.8

2.0-

-

-

-

-

-

1.2

1.5

1.8

2.0

2.2-

90~3.7kW

-

1.4

1.7

2.0

2.2

2.5

-

-

-

A

B

C

D

E

0+0.1

+0.1+0.2

0+0.1+0.2+0.3+0.4

+0.1+0.2-0.2

25522551

Typical machines using a belt are listed above. For other machines using a belt, a load correction coefficient should be fixed by reference to this table.In the case of starts and stops over 100 times per day or rapid acceleration and deceleration, check the above values multiplied by 1.3.

Table 3. Idlers Compensation Coefficient (Ki)Table 2. Speed Ration Correction Coefficient (Kr)

Position of Idler Coefficient (Ki)

Inside the loose side of the belt

Outside the loose side of the beltInside the loose side of the belt

Outside the loose side of the belt

Speed Ratio Coefficient (Kr)1.00 to 1.251.25 to 1.751.75 to 2.502.50 to 3.503.50 or More

‘Step 1«Setting the Necessary Design Conditions

KDesign Power (Pd) =Transmission Power (Pt) MOverload Coefficient (Ks)CCalculate transmission power (Pt) in term of rated power of the prime motor. (Originally, it is ideal to calculate from the actual load applied to the belt.)COverload Coefficient (Ks) = Ko+Kr+Ki Ko: Load Correction Coefficient (Table 1) Kr: Speed Ratio Correction Coefficient (Table 2) Ki: Idler Correction Coefficient (Table 3)

‘Step 2-a«Calculating the Design PowerEEFor MXL, XL, L, H, S iM and MTSiM Series

‘Step 2-b«Calculating the Design PowerEEFor PiM SeriesKDesign Power (Pd) = Transmission Power (Pt) MOverload Coefficient (Ks)CCalculate transmission power (Pt) in term of rated power of the prime motor. (Originally, it is ideal to calculate from the actual load applied to the belt.)COverload Coefficient (Ks) = Ko + Ki + Kr + Kh

Ko: Application coefficient (Table 4) Ki: Correction coefficient when idler is used (Table 5) Kr: Speed increase correction coefficient (Table 6) Kh: Operating correction coefficient (Table 7)

Table 1. Load Correction Coefficient (Ko)

Typical Machines Using a Belt

MotorMax. Output Exceeding 300% of Rated Value

Special Motor (High torque), Single-Cylinder Engine

DC Motor (Series), Operation with Lye Shaft o r Clutch

Max. Output not Exceeding 300% of Rated Value

AC Motor (Standard Motor, Synchronous Motor)

DC Motor (Shunt), Engine with 2 or More Cylinders

Operation Hours Operation Hours

1.0

1.3

1.4

1.5

1.6

1.7

Intermittent use

1 Day

3~5 hrs

2

4

5

6

7

8

9

Regular Use

1 Day

8~12 hrs

1.4

1.6

1.7

1.8

1.9

2.0

2.1

Continuous Use

1 Day

16~24 hrs

Intermittent use

1 Day

3~5 hrs

1.4

1.6

1.7

2.0

2.1

Regular Use

1 Day

8~12 hrs

Continuous Use

1 Day

16~24 hrs

Exhibit Instrument, Projector, Measuring Instrument, Medical Machine

Cleaner, Sewing Machine, Office Machine, Carpentry Lathe, Belt Sawing Machine

Light Load Belt Conveyor, Packer, Sifter

Rotary Speed of Small Pulley (rpm)

Type of Belt, Minimum Number of Teeth

900 or LessOver 900 1200 or LessOver 1200 1800 or LessOver 1800 3600 or LessOver 3600 4800 or LessOver 4800 10000 or Less

Table 12. Min. Number of Teeth of Pulley

‘Step 4«Determining Number of Teeth of Large and Small PulleyCBelt LengthCInter-Shaft Distance

1 Select the number of teeth of large and small pulley from P.2125~2132, which can satisfy the predeterminate speed ratio.(However, with respect to small pulley, select the number of teeth larger than the min. number of teeth in Table 12.)

2 Determine approx. belt circum. length (LpV) in terms of temporary inter-shaft distance (CV), diameter of large pulley (Dp) and diameter of small pulley (dp).

3 After selecting the nearest value of belt circum. length (Lp) to approx. belt circum. length (LpV) from P.1521~1527 of the catalogue,calculate the correct inter-shaft distance with the following formula.

CV: Temporary Inter-shaft Distance Dp : Pitch Diameter of Large Pulley (mm)dp : Pitch Diameter of Small Pulley (mm) LpV: Approx. Belt Circum. Length (mm)

Dp : Pitch Diameter of Large Pulley (mm) C : Inter-Shaft Distancedp : Pitch Diameter of Small Pulley (mm)Lp : Belt Circum. Length (mm)

Note)When the transmission involves regular reverse revolutions, large momentum or extreme impact, a basic-use coefficient of 2.5 or more should be used in some cases.

Should be added for each idler.

Table 4. Applicatio n Coefficient (Ko)

Table 5. Correction Coefficient when Idler is Used (Ki)

Extremely Smooth Transmission

Fairly Smooth Transmission

Transmission with Moderate Impact

Transmission with Considerable Impact

Transmission with Large Impact

    M   o   t   o   r

    A    C    M   o   t   o   r

Single-Phase

Synchronous Motor

DC Motor

Internal Combustion Engine

Hydraulic Motor

2 Poles

4 Poles

6 Poles

8 Poles

4 Poles

6 Poles

8 Poles

Squirrel-CageInduction

Wire-Wound

Type of Passive Unit

Type of Motor

Peak Output/Basic Output 200% or Less 200% to 300% 300% or More

100kW or More

55kW or More

37kW or More

15kW or More

Shunt

8 or More Cylinders

45kW or Less

30kW or Less

11kW or Less

15kW or Less

11kW or Less

5.5kW or Less

Average Torque

Compound

7 to 5 Cylinders

All Types

2.2kW or Less

11kW or Less

7.5kW or Less

3.7kW or Less

High Torque

Series

4 to 2 Cylinders

All Types

C la ss if ic at io n T yp ic al P a ss iv e M ac hi ne sMeasuring Instrument, Camera Device,Radar,Medical Machine, Projector

L oc at io n o f I dl er in Us e I ns id e O ut si deLoose Side of the BeltTense Side of the Belt

Table 6. Speed Increase Correction Coefficient (Kr)

Speed Increase Ratio Correction Coefficient1 to 1.251.25 to 1.751.75 to 2.52.5 to 3.53.5 or More

Table 7. Operating Correction Coefficient (Kh)

Operation HoursCorrectionCoefficient

Operated 10 or More Hours a DayOperated 20 or More Hours a DayOperated 500 Hours or Less (For Seasonal Operation)

‘Step 3«Temporarily Selecting the Type of Belt from Selection Guide Table1 Machine Type 2 Transmission Power 3 Load Fluctuation Level 4 Operation Hours Per Day 5 Rotary Speed of Small Pulley6 Speed Ratio(Number of teeth of large pulley/Number of teeth of small pulley) 7 Temporary Inter-Shaft Distance 8 Limit of Pulley Diameter 9Other Conditions

Speed Ratio =Number of Teeth of Large Pulley

Number of Teeth of Small Pulley

LpV= 2CV+Q(Dp+dp)

2

C =

b = 2Lp-Q(Dp+dp)

b+ b2-8 (Dp-dp)2

8

+Q(Dp-dp)

2

4C

MTS8M

0.1 1 10 100

10,000

1,000

100

10

(rpm)

50,000

40,000

30,000

20,000

10,000

5,000

3,450

2,500

1,7501,500

1,100

870

690515500400

300

200

100

0.01 0.02 0.03 0.05 0.1 0.2 0 .3 0.5 2 3 5 10 20 30 50 100 200 300

Design Power (kw)

Design Power (kw)

    D   e   s    i   g   n    P

   o   w   e   r

(rpm)

MXL XLCT5 LCT10 H

14000100007000500040003000

  P  2  M 0 6 0

  P  2  M 1 0 0

  P  2  M 0 4 0

  P 3  M 1  5 0

  P  5  M 1  5 0  P  5  M

  2 0 0  P  5  M  2  5 0

  P  8  M  1  5  0  P  8  M

  2  0  0  P  8  M  2  5  0

  P  8  M 4  0  0  P  8  M

  6  0  0

  P  5  M 1 0 0

  P 3  M 1 0 0

  P 3  M 0 6 0

20007010W

20

304050

70W

0.1kW

0.2

0.30.40.5

0.7

1

2

34

5

10

20

30

4050

70

100

200

300kW

7

10W

20

304050

70W

0.2

0.30.40.5

0.7

3

5

7

10

20

30405070

100

200kW

4

1

2

0.1kW

7W

10

20

3040

70W

0.1kW

0.2

0.30.40.5

0.7

2

345

7

10

20

304050

70

100kW

1

50

100 200 300 400 500 7 00 1000

rpmNo. of Teeth of Small Pulley Pulley Rotary Speed

Design Power (W)

Applicable Pulley Tooth Number20≤Z30≤40 toothed

20toothed 30toothed 40toothed

20toothed 30toothed 40 toothed

kW

30≤40 toothed

(rpm)

S2M2M

S2M S3M3M

S3M S5M5M

S5M S8M8M

S8M

10,000

5,000

1,000

500

100

50

10 50 100 500 1,000 5,000 10,000

B        e       l           t            W        i           d         

t           h       

( m m  )

Table 8. Selection Guide Table 1 (MXL, XL, L, H, T5, T10)

Table 10. Selection Guide Table 3 (PiM Series)

Table 9. Selection Guide Table 2 (SiM Series)

Table 11. Selection Guide Table 4 (MTS8M)

Selection of Timing Belts 1’Technical Calculations»

Liquid Mixer, Drill Press, Lathe, Screw Machine, Circular Sawing Machine,

Planer, Washing Machine, Paper Manufacturing Machine (Excluding Pulp

Manufacturing Machine), Printing Machine

Mixer (Cement and Viscous Matter), Belt Conveyor (Ore, Coal and Sand),

Grinder, Shaping Machine, Boring Machine, Milling Machine, Compressor

(Centrifugal), Vibration Sifter, Textile Machine (Warper and Winder), Rotary

Compressor, Compressor (Reciprocal)

Conveyor (Apron, Pan, Bucket and Elevator), Extraction, Fan, Blower (Centri-

fugal, Suction and Discharge), Power Generator, Exciter, Hoist, Elevator, Rub-

ber Processor (Calender, Roll and Extruder), Textile Machine (Weaving Ma-

chine, Fine Spinning Machine, Twisting Machine and Weft Winding Machine)

Centrifugal Separator, Conveyor (Flight and Screw), Hammer Mill, Paper

Manufacturing Machine (Pulpapitor)

Belt Conveyor (For light load), Chain Conveyor(For light load), Driller Press, Lathe, S crew Machine,Electric Typewriter, Calculator, Duplicator,Printing Press, Cutter, Paper Folder, Printer, Mixer,Calender Dryer, Lathe, Belt Sawing Machine, Plane,Circular Sawing Machine, Planer, Mixer(Liquid),Bread Baking Machine, Flour Kneading Machine,Sifter (Drum and Cone), Sawing Machine

Belt Conveyor (Ore, Coal, Sand), Elevator, Boring Mill,Grinder, Milling Machine, Shaper, Metal Sawing Machine,Wind Hoist, Dryer, Washing Machine (Including aWringer), Excavator, Mixer, Granulating Machine, Pump(Centrifugal, Gear and Rotary), Compressor (High SpeedCenter), Stirrer, Mixer (Viscous Matter), Centrifugal ForcedBlower, General Rubber Handling Machine, PowerGenerator, Sifter (Electric)

Conveyor (Apron, Bucket, Flight, Screw), Hoist, CuttingPress, Shattering Machine, Pulp Manufacturing Machine,Weaving Machine, Spinning Machine, Twisting Machine,Blender, Centrifugal Separator, Blower (Axial Flow, forMining and Roots), General Construction Equipment,Hammer Mill, Rollgan

Crank Press, Pump (Reciprocal), Compressor(Reciprocating), Civil Engineering, Mining EquipmentIncluding Crushing Machine (Ball, Rod, Gravel), RubberMixer

    R   o   t   a   r   y    S   p   e   e

    d   o    f    S   m   a    l    l    P   u    l    l   e   y

    R   o   t   a   r   y    S   p   e   e    d   o    f    S   m   a    l    l    P   u    l    l   e   y

    R   o   t   a   r   y    S   p   e   e    d   o    f    S   m

   a    l    l    P   u    l    l   e   y

C(W)

P        i           t           c       h       

W        i           d         t           h       

( m m  )