COPYRIGHT 7/98 KIMBALL MIDWESTTITANIUM NITRIDE COATEDSUPER PRIMALLOY DRILLS82-1004 82-1004KIMBALL MIDWEST PRODUCT INFORMATION SHEETTitanium Nitride, sometimes called TiN, is one of the hardest and toughest materials ever developed. When this material is coated onto a cutting tool the performance results can be almost amazing - in hard-to drill materials a drill bit can last up to 5 times longer, while cutting faster and easier.Many of a drill bits performance characteristic are due to the various cutting edges and special geometries that can be ground into the drill. Some of these include self centering split points that prevent walking and wandering while eliminating the need for center punching, reinforced webs that make the drill stronger to resist breakage, modifed web at the point to reduce forward thrust and increase penetration speed. These all make the drill perform faster and easier. Other characteristics of a drill bits performance are due to the material construction itself. Superior M series high speed alloys provide increased fexibility, and the ability to absorb stress without breaking. They hold an edge better and resist wear and abrasion.Some characteristics of the drill bit are due to the surface treatment applied to the outer perimeters of the bit. For example, our ferro-gold treatment provides surface lubricity to reduce friction and heat on the outer drill surfaces when in the hole. Black oxide helps prevent chips from sticking on futes to draw the hot metal away from the point to keep the drill running cooler.Still other characteristics of the performance are obtained by heat treatments and secondary hardening operations like nitro-carburization - these processes provide the high tensile strength and hardness necessary to penetrate tough alloys while resisting abrasion and wear. The harder the cutting edges are, the longer they will resist wear and keep a sharp cutting edge. However, if the drill is too hard it will break quite readily. Typically the maximum hardness possible for high speed drills is in the 64.5-66.5 Rockwell C range (for comparison a Grade 8 cap screw is 33-39).Titanium Nitride provides some amazing characteristics when applied to a cutting tool. First, the coating provides a surface Rockwell C hardness of 82-84. This is vastly harder than is possible with a high speed alloy. This hard-ness dramatically reduces wear to the drill, while enhancing its ability to cut hard alloys. Since the Titanium Nitride is applied as a very thin surface coating, less than one thousandth of an inch thick, the core of the drill is allowed to remain resilient - this helps prevents breakage. Titanium Nitride is also a very slick material. This surface lubricity makes drilling faster and easier with less friction and heat.WHAT ARE THE BOTTOM LINE BENEFITS TO TITANIUM NITRIDE COATED DRILL BITS?1. Up to 500% longer life in high wear or abrasive drilling applications.2. Up to twice the life in mild steel and other non-aggressive drilling applications.3. Faster penetration in tough to drill materials.4. No increased embrittlement or increased breakage concerns.WHAT ARE THE DRAWBACKS TO TITANIUM NITRIDE COATED DRILL BITS?1. Up to 60% higher cost than our Maintenance Length Super Primalloy drill bits.2. If you tend to break a bit before you wear it out, it offers little beneft.WHERE ARE TITANIUM NITRIDE COATED DRILL BITS IDEAL?1. For tough drilling applications where tool consumption is excessive.2. To make tough drilling applications faster and easier.3. In production applications where frequent tool changeover times result in expensive equipment downtime.4. In general drilling where faster performance and increased tool life is desired.Gold Titanium Nitride Coatingprovides up to500% longer tool lifeHeavy DutyWebresists stressbreakage135 Self-CenteringSplit Pointeliminates center punch-ing, will not wanderUncoated ShankTitanium Nitride is too hard for a chuck to properly grip without slippingPremium "M-1" Se-ries Alloyextra resilient, absorbs stressJobbers Lengthprovides full length COPYRIGHT 7/98 KIMBALL MIDWESTKIMBALL MIDWEST PRODUCT INFORMATION SHEETHOW DO THESE TITANIUM NITRIDE COATED DRILL BITS COMPARE TO COBALT DRILL BITS?Cobalt,addedin5%(economygrade)and8%(M-42alloy,thegradewecarry) offers performance benefts when drilling hard to drill materials where heat due to friction is the major cause of drill failure. When a drill is heated close to its tempering (its second heat treat) temperature it looses the heat treated hardness. This results in alloy softening and rapid dulling. M-42 Cobalt resists high temperature to keep thedrillcuttingattemperatureswhereotherdrillbitswouldfail.TitaniumNitride coated drill bits can be used anywhere Cobalt drill bits are used, except where red heat hardness is required - although the Titanium Nitride coating itself will resist the strain, the base M series high speed alloy it is applied to can still overheat and loose supporting hardness.LIKEALLTHINGSTHATOFFERSUBSTANTIALNEWBENEFITS,ARENT THERE CHEAP KNOCK-OFF VERSIONS AVAILABLE?Yes and no. Titanium Nitriding is an expensive process. It is applied in a vacuum chamber and vapor deposited in an ion sputtering process. The cost of this vapor deposition process is high, however there are some obvious cost cutting ways to make a Titanium Nitride coated drill bit:1. Start with a low grade drill bit. 2. Apply a thinner Titanium Nitride coating, particularly at the point, whereprimary cutting activity occurs. LOW GRADE DRILL BITSIf you compare a Super Primalloy Maintenance Length Drill Bit to a standard 118 bright fnished drill bit there are many things to compare - none of them fattering to the 118 standard point bright drill bit. A Super Primalloy Mainte-nance length drill bit is self-centering, will not walk, and requires no center punching. A Super Primalloy Maintenance length drill bit penetrates faster than a non-split point drill, and does it with less effort to the user. A Super Primalloy Maintenance length drill bit has a reinforced web to make it stronger and more breakage resistant. A Super Primal-loy Maintenance length drill bit starts with a superior M series alloy for increased resiliency, edge holding and long fatigue resistant life. All of these things go into producing a high performance maintenance drill bit that makes the toughest jobs easier. The standard 118 drill bit has none of these features or benefts.Now apply Titanium Nitride to a low grade 118 drill bit - what do you get. A drill bit that wont self-center and requires center-punching, a drill bit that requires more forward thrust and effort to make it penetrate (particularly in tough alloys), a thin web that has less resistance to breakage, and possibly a low grade alloy that will be susceptible to fatigue. Whats the beneft to applying Titanium Nitride to this type of drill? In a production application where 118 drills are used it will last much longer. In maintenance drilling applications, applying Titanium Nitride to this type of drill means you will have a drill that makes your job much tougher and time consuming to complete than if you use a Super Primalloy drill bit, and it will keep on doing this for a long time. The surprising thing about Titanium Nitride coated drill bits is how many lower grade versions there are available. Titanium Nitride by itself does not make a superior quality maintenance drill, it simply makes a drill bit last longer. If a drill bit has inferior characteristics to begin with, applying Titanium Nitride to it only assures that you get an poor performing drill bit that lasts longer than other poor performing drill bits.THIN TITANIUM NITRIDE COATINGSThe obvious drawback to this is that the drill bit will not hold up as long as it otherwise would. The coating, even as hard and abrasion resistant as it is,will eventually wear down - and a thinner coating wears down faster. Our Super Primalloy Titanium Nitride coated drill bits offer the maximum coating thickness feasible, with up to twice the coating thickness at the point where the most cutting wear occurs.TITANIUM NITRIDE COATEDSUPER PRIMALLOY DRILLS82-1004-1 82-1004-1