Osg 10359405 Screw Machine Drill Bit 23/64 in Cobalt Hss

Product Description

The OSG 10359405 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 titanium nitride (TiN) coating, this bit handles demanding materials that standard HSS tooling struggles with. It measures 23/64 inches (0.3594 inches decimal) in diameter with a 3-9/16 inch overall length and a 130-degree split point for fast penetration and reduced walking. The shorter screw machine length body provides increased rigidity compared to jobber-length bits, making it well-suited for CNC machining centers, turret lathes, and drill presses.

This bit is intended for professional machinists and tooling technicians working in production and job-shop environments. The cobalt HSS construction and TiN coating extend tool life when drilling hardened steel, alloy steel, and other ferrous metals. The straight cylindrical shank fits standard drill chucks without requiring collets or adapters. With a 3xD flute-to-diameter ratio and a 1-3/4 inch flute length, it is optimized for shorter-reach, high-rigidity setups typical in screw machine and turret operations.

Key Features

• Cobalt high speed steel construction resists heat and wear in steel and alloy steel drilling
• TiN coating reduces friction and extends cutting edge life
• 130-degree point angle with R-thinned web for fast engagement and reduced thrust force
• Screw machine length body (3-9/16 inches OAL) delivers greater rigidity than jobber-length bits
• Right-hand spiral flute with tapered web configuration for consistent chip evacuation
• Straight cylindrical shank (0.375 inches diameter) fits standard three-jaw drill chucks

Compatibility

Designed for use in drill presses, CNC machining centers, turret lathes, and screw machines equipped with standard straight-shank drill chucks. Primary workpiece materials are steel and alloy steel.

Installation Notes

Install and remove tooling only when the spindle is fully stopped and the machine is powered down. Secure the straight shank firmly in the chuck to the full grip depth before operation. Use appropriate cutting fluid or coolant for steel drilling to manage heat buildup, as this bit does not support through-coolant delivery. Inspect the cutting edges before each use and replace the bit if chipping or wear is observed.