Osg 630020211 Screw Machine Drill Bit 13/64 Carbide

Product Description

The OSG 630020211 is a solid carbide screw machine length drill bit designed for high-performance drilling in ferrous materials. It measures 13/64 inches (0.2031 inches decimal) in diameter with a 140-degree R-thinned point that reduces thrust and improves centering on entry. The overall length is approximately 2.6 inches (66 mm), making it a compact stub-length tool well suited for close-clearance work. The EgiAs coating adds surface hardness and heat resistance to extend tool life in demanding cuts. Two spiral flutes with a regular helix provide efficient chip evacuation throughout the cut.

This drill bit is intended for production and maintenance drilling in steel, alloy steel, and cast iron. The screw machine length format — shorter than jobber length — increases rigidity and reduces deflection, which is especially useful in CNC machining centers, drill presses, and turret lathes where tool overhang must be minimized. The straight-cylindrical shank with a 0.25-inch diameter fits standard drill chucks and collet systems without modification.

Key Features

• Solid carbide construction for rigidity and wear resistance in hard ferrous materials
• EgiAs coating improves surface hardness and thermal resistance for extended tool life
• 140-degree R-thinned point reduces entry thrust and self-centers on the workpiece
• Screw machine (stub) length increases rigidity and minimizes deflection in tight setups
• Regular spiral flute geometry promotes consistent chip evacuation in steel and cast iron
• Tapered web configuration with R-thinned web reduces cutting force at the chisel edge

Compatibility

Designed as an OEM-style replacement or production drill bit for use in standard drill chucks and collet holders accepting a 0.25-inch straight-cylindrical shank. Primary workpiece materials are steel, alloy steel, and cast iron.

Installation Notes

This tool is typically installed and operated by machinists or maintenance technicians using a drill press, CNC machining center, or turret lathe. Secure the straight shank fully in a drill chuck or collet before operation and verify runout before cutting. Do not exceed the tool manufacturer's recommended speeds and feeds for the workpiece material. Inspect the cutting edges for chipping or wear before each use, as solid carbide is brittle and can fracture if the setup has excessive vibration or the tool is improperly supported.