Hertel 89321921 Drill Bit 57/64 Inch Hss 118 Point

Product Description

The HERTEL 89321921 is a screw machine length drill bit designed for high-production drilling applications where shorter overall length provides greater rigidity and reduced deflection. Ground from high-speed steel (HSS) with a bright, uncoated finish, it features a 118-degree split point geometry and a right-hand cutting direction. At 57/64 inch (0.8906 inch) in diameter and 5.625 inches overall length, this bit is suited for use in drill presses, CNC machines, and manual lathes. Machinists, tool-and-die workers, and industrial maintenance technicians use this style of bit for close-tolerance work in metals and general-purpose materials.

Screw machine length drill bits are shorter than jobber-length bits, making them the preferred choice in turret lathes, screw machines, and short-throw drill press setups where reduced overhang improves hole accuracy. This bit is appropriate for general-purpose drilling in steel, cast iron, aluminum, and similar materials. The 57/64 inch diameter places it in the 0.6000 inch and above size range, suitable for larger-diameter through holes and counterbore pilot applications in production environments.

Key Features

• 57/64 inch diameter (0.8906 inch decimal) for precise sizing
• 118-degree point angle for general-purpose entry into a wide range of metals
• High-speed steel construction provides durability in production drilling
• Bright, uncoated finish for easy visual inspection of cutting edge condition
• Screw machine length body (5.625 inches OAL) reduces deflection compared to jobber-length bits
• Right-hand cut compatible with standard drill press and CNC spindle rotation

Compatibility

Designed as a general-purpose screw machine length drill bit compatible with standard drill chucks, collet holders, and lathe turret tooling that accept 57/64 inch shank diameters across production machining equipment.

Installation Notes

Installation and use should be performed by a qualified machinist or maintenance technician familiar with rotating cutting tools. Ensure the machine spindle is fully stopped and locked out before installing or removing the bit. Secure the shank firmly in the chuck or collet to the manufacturer-specified holding depth to prevent slippage under load. Always use appropriate cutting fluid or coolant for the workpiece material to extend tool life and maintain dimensional accuracy.