Hertel 89321814 Screw Machine Drill Bit 45/64 in Hss

Product Description

The HERTEL 89321814 is a screw machine length drill bit designed for high-throughput drilling in metal fabrication, machining, and maintenance applications. Built from high-speed steel with a bright, uncoated finish, it measures 45/64 inches (0.7031 inches decimal) in diameter with a 118-degree split or conventional point angle. The shorter screw machine body length — 4.75 inches overall — provides added rigidity compared to jobber-length bits, reducing deflection and improving hole accuracy in production drilling environments. This bit cuts right-hand with a 3-inch flute length, making it well suited for use in drill presses, turret lathes, CNC machining centers, and hand-held power drills where a stiffer bit body is preferred.

This drill bit is rated for general-purpose drilling and is appropriate for use by machinists, maintenance technicians, pipefitters, and industrial tradespeople. It is suited for drilling into mild steel, aluminum, brass, cast iron, and similar materials. The screw machine length format is common in production-floor settings where depth of drill travel is limited and bit rigidity is a priority. Sold as a single bit per package.

Key Features

• 45/64 inch diameter (0.7031 inches decimal) for precise hole sizing
• 118-degree point angle — standard for general-purpose metal drilling
• High-speed steel construction handles moderate heat and cutting speeds
• Screw machine length body (4.75 inches OAL) provides greater rigidity than jobber-length bits
• 3-inch flute length for efficient chip evacuation
• Right-hand cut, bright uncoated finish — no coating buildup to affect tolerance

Compatibility

Designed as a general-purpose screw machine length drill bit compatible with standard drill chucks accepting 45/64 inch round shanks, including drill presses, lathes, and CNC machining centers that accommodate bits in the 0.6000 inch and above size range.

Installation Notes

Installation and use should be performed by a qualified machinist or tradesperson familiar with rotating cutting tools. Secure the bit firmly in the chuck and verify runout before drilling. Always power down and de-energize the machine before changing bits. Use appropriate cutting fluid for the workpiece material to extend bit life and maintain hole quality.