Hertel 83238915 Letter V Screw Machine Drill Bit Hss

Product Description

The HERTEL 83238915 is a screw machine length drill bit sized to letter V (0.3770 inches decimal), designed for high-production drilling in metal fabrication and machining environments. Built from high-speed steel with an oxide coating, it features a 135-degree split point that reduces walking and lowers thrust requirements at entry. The web-thinned, parallel-web construction supports heavier feeds without sacrificing edge stability. At 3.25 inches overall length, the stub-length format delivers added rigidity over jobber-length bits, making it well-suited for drill press and CNC turret applications where chatter and deflection need to be minimized.

This bit is intended for use in screw machine operations, production drilling fixtures, and general metalworking setups requiring a stub-length drill in the 0.35 to 0.40 inch size range. The straight cylindrical shank fits standard drill chucks and collet holders without modification. The right-hand spiral flute geometry promotes chip evacuation during through-hole and blind-hole drilling in steel, cast iron, and similar ferrous materials. It carries NAS 907 specification under the NAS designation, indicating conformance to aerospace and industrial tooling standards.

Key Features

• Letter V size: 0.3770 inches decimal equivalent for precise hole sizing
• 135-degree split point reduces entry thrust and eliminates pilot-punch requirements on most metals
• Web-thinned, parallel-web design supports heavy-duty feed rates
• High-speed steel construction with oxide coating for wear resistance and chip adhesion reduction
• Stub screw machine length (3.25 inches OAL) provides rigidity in tight setups
• Meets NAS 907 specification for consistent dimensional and performance standards

Compatibility

Designed as an OEM-style replacement or standard tooling selection for screw machine operations, CNC turrets, and drill press applications requiring a straight-shank stub-length drill bit in the 0.35 to 0.40 inch diameter range.

Installation Notes

Installation is performed by qualified machinists or tooling technicians. Ensure the machine spindle is fully stopped and locked out before changing bits. Verify chuck or collet size matches the 0.3770-inch straight cylindrical shank before seating. Inspect the split point for chips or edge damage prior to use, and confirm workpiece is securely fixtured to prevent movement during drilling.