Hertel 66692245 Screw Machine Drill Bit Size 48 Cobalt

Product Description

The HERTEL 66692245 is a screw machine length drill bit designed for high-speed, close-tolerance drilling in metal fabrication, machining, and maintenance applications. Built from heavy-duty cobalt tool steel with a titanium nitride (TiN) coating, it delivers extended wear resistance and heat tolerance compared to standard high-speed steel bits. The 135-degree split point starts on contact without a center punch, reducing walking and improving hole location accuracy. At 1-11/16 inches overall length, the shortened flute geometry provides added rigidity and reduces deflection in screw machine and turret lathe setups.

This bit is suited for production drilling in ferrous metals, stainless steel, cast iron, and other hard or abrasive materials where standard HSS bits wear prematurely. The screw machine length format is common in CNC machining centers, drill presses, and automatic screw machines where stub-length tooling is preferred for rigidity. It is sold individually but requires a minimum order of 12 units per purchase.

Key Features

• Heavy-duty cobalt construction for improved heat and wear resistance in hard metals
• TiN coating extends tool life and reduces friction at the cutting edge
• 135-degree split point for self-centering starts without a pilot hole or center punch
• Web-thinned parallel web design reduces thrust and improves chip evacuation
• Screw machine length (stub) geometry increases rigidity and minimizes deflection
• Right-hand cut with regular spiral flute for standard drilling operations

Compatibility

Designed for use in screw machines, turret lathes, CNC machining centers, and drill presses accepting a straight-cylindrical shank of 0.0760 inches in diameter. Fits standard drill chucks and collets sized for wire gauge tooling in the 0.0000 to 0.1000 inch decimal inch range.

Installation Notes

Installation and tool changes should be performed with the machine fully powered down and locked out per OSHA lockout/tagout procedures. Secure the straight-cylindrical shank fully into the chuck or collet before operation to prevent slippage. Do not exceed the rated speed and feed for the workpiece material and bit diameter. Inspect the cutting edge and TiN coating for wear before each use, as cobalt bits used beyond their service life can fracture under load.