Chicago-latrobe 44817 Taper Length Cobalt Drill Bit 17/64

Product Description

The CHICAGO-LATROBE 44817 is a taper length cobalt drill bit designed for high-performance drilling in hard and abrasive materials. Built from M42 cobalt high-speed steel with a black oxide finish, it delivers superior heat and wear resistance compared to standard HSS bits. The 135-degree split point reduces walking and allows self-centering starts without a center punch. At 17/64 inch in diameter with a 3-7/8 inch flute length and 6-1/4 inch overall length, this bit suits applications where a longer reach is needed beyond a jobber-length tool. Spiral flutes with web thinning promote chip evacuation and reduce thrust. Licensed trades and industrial machinists turn to this bit for demanding production environments.

The 44817 is rated for use in cast iron, high-tensile steel, Inconel, manganese steel, and titanium - materials that defeat standard carbon or uncoated HSS tooling. The taper length body gives added reach in deep-hole setups, blind bores, and fixture drilling where a jobber bit falls short. The straight cylindrical shank seats in standard drill chucks and collet holders without modification, making it compatible with bench drills, drill presses, and CNC machining centers used in fabrication, maintenance, and aerospace MRO workflows.

Key Features

• M42 cobalt steel construction for extended tool life in hard and high-temperature alloys
• 135-degree split point for self-centering starts and reduced thrust load
• Black oxide finish improves lubricity and reduces heat buildup at the cutting edge
• Web-thinned tapered web promotes chip clearance and lowers drilling torque
• Taper length body provides extra reach over standard jobber-length bits
• Right-hand spiral flute with regular helix suits a wide range of material feeds and speeds

Compatibility

Designed for use in cast iron, high-tensile steel, Inconel, manganese steel, and titanium. Fits any drill press, hand drill, or CNC spindle accepting a straight cylindrical shank at 0.2656 inch diameter.

Installation Notes

Install in a drill press or CNC spindle with the shank fully seated and the chuck or collet tightened to tool-holding specifications before starting the cut. Use cutting fluid or coolant appropriate for the workpiece material - cobalt tooling tolerates dry cutting in many ferrous applications, but lubrication extends tool life in stainless and nickel alloys. Secure the workpiece firmly to prevent movement during drilling. Inspect the cutting edges before each use; cobalt bits are brittle under lateral load and should not be used in applications with significant side pressure.