Osg 650028011 Carbide Screw Machine Drill Bit 0.2811 in

Product Description

The OSG 650028011 is a solid carbide screw machine length drill bit designed for high-performance drilling in demanding metalworking applications. It features a 0.2811 inch (9/32 inch) diameter, a 140-degree split point, and a right-hand spiral flute configuration. The shorter screw machine length body provides rigidity and reduces deflection in high-speed production setups. R-thinned web geometry lowers thrust force and improves chip evacuation. Coolant-through capability supports extended tool life in deep-hole operations. This bit is suited for machinists, toolroom operators, and production drilling technicians working with ferrous and exotic materials.

The OSG 650028011 is engineered for cutting steel, alloy steel, cast iron, titanium, and titanium alloys. Its 3xD flute-to-diameter ratio and regular spiral flute geometry make it a practical choice for CNC machining centers, drill presses, and manual mills where a stiff, short-length bit is needed. The straight-cylindrical shank fits standard drill chucks and collet holders without modification. Series 6500 identifies this as part of OSG high-performance carbide drill lineup.

Key Features

• Solid carbide construction for rigidity and wear resistance in hard materials
• 140-degree point angle reduces walking and improves entry in steel and alloy steel
• R-thinned, tapered web lowers cutting thrust and improves chip flow
• Coolant-through design supports heat management in production drilling
• Screw machine (stub) length body minimizes deflection in high-speed applications
• Right-hand cut with regular spiral flutes for consistent chip evacuation

Compatibility

Designed for use in CNC machining centers and manual drilling equipment with standard straight-cylindrical chuck or collet systems. Primary workpiece materials include steel, alloy steel, cast iron, titanium, and titanium alloy. Fits drill size range of 0.2500 to 0.3000 decimal inch (6.50 to 8.00 mm).

Installation Notes

Installation and use should be performed by qualified machinists or toolroom personnel familiar with carbide tooling. Secure the shank fully in the chuck or collet before operation and verify runout is within acceptable limits, as carbide is brittle and sensitive to side loading. Power down and de-energize the machine spindle before changing tooling. Always apply appropriate cutting fluid or coolant when drilling ferrous metals and titanium alloys to prevent premature tool wear.