Hertel 83238840 Screw Machine Drill Bit Letter P Hss

Product Description

The HERTEL 83238840 is a screw machine length drill bit sized at Letter P (0.3230 inches) with a 135-degree split point and a web-thinned geometry. Built from high-speed steel with an oxide coating, this bit is designed for heavy-duty drilling in metal, providing reduced thrust at entry and improved chip evacuation through its spiral flute design. The straight-cylindrical shank allows direct mounting in standard drill chucks. At 2-15/16 inches overall length, this screw machine format offers greater rigidity than jobber-length bits, reducing deflection in short-reach drilling operations. Licensed machinists, tool-and-die technicians, and production drillers use this bit for precision work in ferrous and non-ferrous materials.

This bit is suited for production machining environments, CNC drilling operations, and manual drill press work where hole location accuracy and consistent diameter are critical. The shorter overall length compared to jobber-length bits makes it a preferred choice for close-tolerance work in tight setups. The NAS 907 specification designation confirms it meets aerospace and industrial dimensional standards, making it appropriate for shops that require traceable tooling specifications. It is sold individually but requires a minimum order quantity of 6 units.

Key Features

• Letter P size — 0.3230 inch diameter, within the 0.3000 to 0.3500 inch size range
• 135-degree split point reduces entry thrust and self-centers on the workpiece
• Web-thinned parallel web configuration improves chip flow and reduces heat buildup
• High-speed steel construction with oxide coating for corrosion resistance and lubricity
• Screw machine length (2-15/16 inches OAL) delivers added rigidity over jobber-length alternatives
• Meets NAS 907 specification for consistent dimensional compliance

Compatibility

Designed as an OEM-style replacement or direct substitute for Letter P screw machine length drill bits meeting NAS 907 specification in standard straight-cylindrical shank drill chucks and collet holders.

Installation Notes

Install into a properly sized drill chuck or collet holder, ensuring the shank is fully seated and the chuck is tightened securely before operation. Always power down and lock out the machine before changing tooling. Cutting fluid or coolant is recommended for extended runs in steel, though this bit does not support through-coolant delivery. Inspect the cutting edges for wear or chipping before each use — a worn split point will increase thrust and compromise hole quality.