Hertel 89321798 Screw Machine Drill Bit 35/64 in Hss

Product Description

The HERTEL 89321798 is a screw machine length drill bit designed for general-purpose drilling in metal, wood, and plastic. Screw machine length bits are shorter than jobber-length bits, providing increased rigidity and reduced deflection in drill press, turret lathe, and screw machine applications. This bit measures 35/64 inch (0.5469 inch) in diameter with a 4-inch overall length and a 2.5-inch flute length. The 118-degree split or conventional point geometry suits a wide range of common work materials. Constructed from high-speed steel with a bright, uncoated finish, it is suited for general shop use where coating is not required. Installation and use are performed by machinists, toolroom technicians, and skilled tradespeople.

This drill bit is appropriate for production and maintenance drilling operations where a compact, rigid bit is preferred over standard jobber length. Screw machine length bits are commonly used in CNC turret lathes, drill presses, and automated screw machines where the shorter length reduces chatter and improves hole accuracy. The 35/64-inch diameter falls within the 0.5000 to 0.6000 inch drill bit size range, making it useful for clearance holes, stepped bores, and through-hole drilling in light to medium-duty shop environments.

Key Features

• 35/64 inch (0.5469 inch) diameter for precise sizing within the 0.5000 to 0.6000 inch range
• Screw machine length body at 4 inches overall length provides added rigidity over jobber-length bits
• 2.5-inch flute length allows adequate chip evacuation in standard depth applications
• 118-degree point angle suits general-purpose drilling across common work materials
• High-speed steel construction offers good wear resistance for general shop use
• Bright, uncoated finish is suitable for applications where specialized coatings are not required
• Right-hand cut for use in standard clockwise-rotating spindles

Compatibility

Designed as a general-purpose screw machine length drill bit compatible with standard drill chucks and collet holders accepting 35/64-inch shank diameters, including drill presses, turret lathes, and CNC screw machines.

Installation Notes

This bit is installed and used by machinists and maintenance technicians. Secure the bit fully in the chuck or collet and verify runout before drilling. Power down and de-energize the machine spindle before changing tooling. Use appropriate cutting fluid for the work material to extend tool life and improve hole finish.