The Fundamentals of Thread Forming Taps - form tap drill size
Ti coatingpvdcoating
CERTESS Ti Titanium Nitride coating provides temperature resistance up to 500°C. Deposition temperatures range from 250 to 450°C. As with most HEF coatings, CERTESS Ti is chemically inert and produces no significant change in part dimensions or surface geometry.
Titanium Nitridecoatingthickness
HEF bushings are recognized worldwide for their excellent frictional and anti-seizure properties, and ability to withstand high loads.
Speed Helix – More aggressive drilling angle on drill bit flutes, which provides up to 3x faster penetration. Extends the life of the drill and extends battery life in cordless drills.
PVD coatings involve the deposition of thin (2-10 microns; 0.0001" – 0.0004") films on the surface of tools and components.
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Liquid nitriding is a subcritical surface enhancement process with one of the longest track records of success of any case hardening technology.
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Titanium – High speed steel bits which have been coated with titanium nitride. This special coating gives the bits a very high surface hardness to help penetrate tough materials, makes the bits highly corrosion resistant and significantly reduces friction between bit and workpiece. Titanium coated bits last up to 6X longer than standard high speed steel bits. Vermont American titanium drill bits feature the following: (1) grip tight shank for positive chuck hold, (2) titanium coating hardens bit surface or improved durability in tough, repetitive applications and acts as lubricant, requiring less torque and less heat build-up for longer bit life, (3) speed helix augers dust away from tip more quickly, reducing heat for long life and (4) 135 degree split point starts fast and reduces drill walking. Click here to see available sizes.
CERTESS Ti Titanium Nitride ceramic coating is a dense PVD film, with nano-scaled grains. Typical deposited films are 2 to 6 μm, depending on the application; hardness is 2700 HV.
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135° Split Point – Starts on contact in metal, wood and plastic. Eliminates “walking” or “skating” when drilling into metal. 135° Split Point on all bits above 1/8″.
High Speed Steel (HSS) – Standard general purpose bits with a polished finish with silver appearance. Click here to see available sizes.
Titanium nitridecoatingprocess
Applications that benefit most from CERTESS Ti PVD coating are low-end cutting & forming tools and mechanical parts that require moderate levels of long-term abrasive wear resistance. This coating is also commonly used for decorative applications in door hardware, plumbing etc. Compatible substrates include metals and alloys that contain zero, or only small quantities of zinc, magnesium or lead.
Gold Oxide – Offers added speed and durability for general purpose drilling applications in wood, metal and plastic and drills 3x faster with speed helix. Click here to see available sizes.
Black Oxide – High speed steel bits with an added heat treatment that reduces friction between bit and workpiece. Black oxide bits have 50% longer life than standard high speed steel bits. Click here to see available sizes.
118° Point – Designed primarily for drilling into wood or plastic. Center punch is required for drilling into metal, otherwise bit will “walk” or “skate”.
Cobalt – Cobalt bits are a special formulation of high speed steel with cobalt added in to withstand very high drilling temperatures. Cobalt bits are specifically designed for drilling very hard, abrasive materials such as treated stainless steel, titanium and cast iron. Cobalt bits are not designed for general purpose use. Vermont American cobalt drill bits feature the following: (1) grip tight shank for positive chuck hold, (2) cobalt withstands high drilling heat for longer bit life and includes thick web for increased durability and (3) 135 degree split point starts fast and reduces drill walking. Click here to see available sizes.