Osg 8670370 Carbide Screw Machine Drill Bit 0.1457in

Product Description

The OSG 8670370 is a solid carbide screw machine length drill bit designed for high-performance drilling in ferrous materials. Built on OSG Series 6300, it features a 140-degree split point with X-thinned web geometry that reduces thrust and improves chip evacuation at entry. The 0.1457-inch (3.70 mm) diameter is held to a tight tolerance of +0 to -0.018 mm, making it suitable for precision hole applications. With a straight-cylindrical shank and regular spiral flutes, this bit seats securely in standard drill chucks and collet holders. It is intended for use by machinists, toolroom technicians, and production floor operators running CNC or manual drilling equipment.

The OSG 8670370 is suited for drilling into steel, alloy steel, and cast iron in screw machine, CNC lathe, and benchtop drill press operations. The screw machine length profile — shorter than jobber length — provides added rigidity in close-clearance setups and automated turret applications. The 2xD flute-to-diameter ratio supports chip clearance in shallow-to-moderate depth holes. The tapered web configuration and X-thinned web work together to maintain bit strength while lowering cutting forces in production runs.

Key Features

• Solid carbide construction for wear resistance in ferrous material applications
• 140-degree point angle with X-thinned tapered web for reduced entry thrust
• 0.1457-inch (3.70 mm) cutting diameter with tolerance of +0 to -0.018 mm
• Screw machine length for rigidity in tight-clearance and turret setups
• 2-flute regular spiral design promotes chip evacuation in steel and cast iron
• Straight-cylindrical shank fits standard drill chucks and ER collet systems

Compatibility

Designed as an OEM-style replacement and production drill bit for machining operations in steel, alloy steel, and cast iron workpieces as part of the OSG Series 6300 lineup.

Installation Notes

Installation and use should be performed by qualified machinists or toolroom personnel familiar with carbide tooling. Before installing, ensure the spindle or turret is fully stopped and locked out. Carbide tooling is brittle — avoid side loading, interrupted cuts without proper feed rate adjustment, and dropping or impacting the cutting edge. Follow machine manufacturer feed and speed recommendations for carbide drills in the target workpiece material.