Hertel 83238857 Screw Machine Drill Bit Letter Q Hss

Product Description

The HERTEL 83238857 is a screw machine length drill bit sized to Letter Q (0.3320 inches decimal equivalent), designed for high-production drilling in metal fabrication and machining environments. Built from heavy-duty high-speed steel with an oxide finish, it features a 135-degree split point that reduces walking and lowers thrust requirements at entry. Overall length is 3 inches with a 1-11/16-inch flute length, making it suitable for close-clearance drilling in drill presses, CNC machines, and screw machine setups. Web-thinned construction and a parallel web configuration improve chip evacuation and cutting efficiency in ferrous and non-ferrous materials.

This bit is intended for production machining and metalworking applications where a shorter, stiffer tool is preferred over jobber-length bits. The screw machine length profile reduces deflection and improves hole accuracy in high-cycle drilling operations. It is commonly used in machine shops, manufacturing lines, and maintenance operations requiring consistent hole quality at the 0.332-inch diameter range. NAS 907 specification compliance makes it appropriate for aerospace-adjacent and precision manufacturing contexts.

Key Features

• Letter Q size: 0.3320 inches decimal equivalent, NAS 907 specification compliant
• 135-degree split point reduces drill walk and cutting thrust at entry
• Web-thinned parallel web for improved chip flow and reduced cutting force
• Heavy-duty high-speed steel construction with oxide coating for heat and wear resistance
• Screw machine length (3 inches OAL) provides rigidity and deflection control in close-clearance setups
• Right-hand cut with regular spiral flute geometry suits a wide range of common metals

Compatibility

Designed as a straight-cylindrical shank screw machine length drill bit compatible with standard drill chucks and collet holders accepting a 0.3320-inch shank diameter across drill presses, CNC machining centers, and screw machines.

Installation Notes

Installation and use should be performed by qualified machinists or tooling technicians familiar with proper drill press and machine tool safety procedures. Secure the shank fully in the chuck or collet before operation and verify runout before beginning a production run. Ensure the workpiece is properly fixtured to prevent movement during drilling. Follow applicable machine guarding and PPE requirements per shop safety standards.