Osg 650038911 Screw Machine Drill Bit 25/64 in Carbide

Product Description

The OSG 650038911 is a solid carbide screw machine length drill bit engineered for high-performance drilling in demanding metalworking applications. It features a 25/64 inch (9.92 mm) diameter, a 140-degree point angle with R-thinned web geometry, and an EgiAs coating designed to extend tool life and reduce friction at the cutting edge. The straight-cylindrical shank measures 0.4375 inches in diameter, and the overall length is 4.1732 inches (106 mm). With two spiral flutes and a 3xD flute-to-diameter ratio, this bit delivers efficient chip evacuation in short, controlled cuts. Coolant-through capability supports high-speed production environments where heat management is critical.

This drill bit is intended for use on steel, alloy steel, cast iron, titanium, and titanium alloys. The screw machine length format — shorter than jobber length — provides added rigidity and reduced deflection, making it well suited for CNC machining centers, turret lathes, and drill presses where close-tolerance hole location is required. It is commonly used in production shops, tool rooms, and precision machining operations where consistent hole quality across high cycle counts is expected.

Key Features

• Solid carbide construction for rigidity and wear resistance in hard and abrasive workpiece materials
• EgiAs coating reduces cutting friction and extends tool life compared to uncoated carbide
• 140-degree point angle with R-thinned web minimizes thrust force and improves centering on entry
• Coolant-through design supports high-speed machining with internal chip and heat management
• Screw machine length provides increased rigidity and reduced deflection versus jobber-length drills
• Tapered web configuration maintains core strength through the full flute length

Compatibility

Designed as an OEM-style replacement or production-use drill bit for CNC machining centers, turret lathes, and drill presses requiring a straight-cylindrical shank, 25/64 inch diameter bit in the OSG Series 6500 platform. Primary workpiece materials include steel, alloy steel, cast iron, titanium, and titanium alloys.

Installation Notes

Installation and use of this drill bit should be performed by a qualified machinist or tooling technician. Ensure the machine spindle and collet or chuck are fully powered down and locked out before changing tooling. Verify that the shank diameter matches the holding system tolerance before securing the bit. Do not exceed the recommended spindle speed and feed rate for the workpiece material being drilled.