Osg 10323005 Screw Machine Drill Bit 0.323 in Cobalt Hss

Product Description

The OSG 10323005 is a screw machine length drill bit designed for high-performance drilling in steel and alloy steel applications. Built from cobalt high speed steel with a coated finish, this bit handles demanding materials where standard high speed steel dulls prematurely. It features a 0.323 inch (letter size P, 8.20 mm) cutting diameter, a 130-degree point angle for self-centering starts, and a right-hand spiral flute configuration. At 3.5 inches overall length, it fits standard screw machine and production drilling setups. Licensed machinists, tool-and-die technicians, and industrial maintenance mechanics are the typical installers.

This bit is suited for short-hole production drilling in steel and alloy steel workpieces. The screw machine length profile keeps the bit rigid and reduces deflection in CNC drill presses, turret lathes, and automatic screw machines. The 3xD flute-to-diameter ratio and tapered web with R-thinning improve chip evacuation and reduce thrust in tighter drilling cycles. It fits any standard straight-shank chuck.

Key Features

• Cobalt high speed steel construction for extended tool life in steel and alloy steel
• 130-degree point angle for aggressive, self-centering entry
• R-thinned, tapered web reduces thrust and improves chip flow
• Screw machine (stub) length for maximum rigidity and minimal deflection
• Right-hand cut, regular spiral flute for consistent chip evacuation
• Straight-cylindrical shank fits standard drill chucks without adapters

Compatibility

Designed as an OEM-style replacement or direct-use screw machine drill bit for production and maintenance drilling in steel and alloy steel workpieces using any standard straight-shank chuck with 0.323 inch capacity.

Installation Notes

Installation is performed by machinists or maintenance mechanics in machine shop or industrial maintenance environments. Secure the shank fully in the chuck and verify runout before drilling. Use appropriate cutting fluid or coolant for steel to extend tool life, noting this bit does not support coolant-through operation. Follow applicable shop safety standards for rotating tooling, including proper workpiece clamping and eye protection.