Osg 8670350 Screw Machine Drill Bit 0.1378in Carbide

Product Description

The OSG 8670350 is a solid carbide screw machine length drill bit designed for high-performance drilling in ferrous and hard materials. It features a 3.50 mm (0.1378 inch) diameter, a 140-degree split point, and a right-hand spiral flute configuration. The X-thinned web reduces thrust and improves chip evacuation at the point. At 66.00 mm overall length with a 20.00 mm flute length, this is a stub-length format built for rigidity and accuracy in production and machine-shop environments. Licensed machinists, toolroom technicians, and CNC operators are the primary users.

This drill bit is suited for drilling steel, alloy steel, and cast iron in production machining, job shop, and automated CNC applications. The screw machine length format provides extra stiffness compared to jobber-length bits, making it well suited for tight-tolerance hole work, short-reach fixturing, and drilling in confined setups. The straight-cylindrical shank fits standard drill chucks and collet holders. The Series 6300 classification places this in OSG high-performance carbide tooling intended for demanding metal-removal applications.

Key Features

• Solid carbide construction for rigidity and wear resistance in ferrous materials
• 140-degree point angle reduces walking and improves centering without a pilot
• X-thinned web lowers axial thrust and extends tool life
• Regular spiral flute with tapered web configuration promotes consistent chip flow
• Screw machine (stub) length format increases stiffness and reduces deflection
• Coated finish for added surface hardness and lubricity during cutting

Compatibility

Designed for use in drilling steel, alloy steel, and cast iron. The straight-cylindrical 4.00 mm shank is compatible with standard drill chucks and collet systems accepting that shank diameter.

Installation Notes

Installation of this drill bit is performed by qualified machinists or CNC setup technicians. Ensure the machine spindle is fully stopped and locked out before inserting or removing tooling. Verify chuck or collet runout is within acceptable tolerance before use, as solid carbide is more brittle than high-speed steel and sensitive to lateral loading. Do not exceed the recommended feed and speed parameters for the workpiece material grade.