Cobalt Drill Bits, HSS Drill Bits, Masonry Drill Bits, Long Drill Bits

Cobolt Drill Bits

Bosch cobalt drill bits offer the best heat resistance and rigid thick web design for drilling in extremely hard and abrasive materials such as treated stainless steel (precipitation-hardened), cast iron and titanium

135° split point starts on contact with no walking or skating and no center punch is required

A tough cobalt alloy delivers heat resistance up to 1100° Fahrenheit allowing the bit to perform for extended periods of time in the most abrasive materials without failing due to the high heat levels

Overall bit hardness of 66-68 HRC from the cobalt formulation gives the ability to penetrate exceptionally tough materials

Drill Bits Tip

Twist bits are also available coated with Titanium nitride (TiN), these are easily identified by the gold like colour. This coating increases the hardness of the bit and adds a self-lubricating property. The coating is only really effective when metal is being drilled, it has little effect when working with other materials. Twist drills are usually available in sizes 0.8-12 mm plus.

They are designed for drilling relatively small holes, they sometimes tend to clog quickly especially when the wood is 'green' so when drilling deep holes (especially in hardwood) the bits should be withdrawn regularly to remove the waste. Special care is required when using the smallest sizes since these bits are thin and brittle.

Always hold the drill square to the work and apply only light pressure when drilling. Sharpening - use a drill sharpener, a grindstone jig or an oilstone. Titanium nitride bits cannot be sharpened without destroying the coating (although if the drill needs sharpening, the coating will probably have already been destroyed). Forming the correct angle at the tip is important for efficient cutting.

• Lathe Drill Bits
• Hammer Drill Bit
• Drill Unit
• Cordless Drill Bit
• Bosch Drill
• Cobalt Drill
• Tile Drill Bit
• Titanium Drill Bit Set
• Rock Drill Bit

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