Sgs 66479 Screw Machine Drill Bit 0.4291 in Solid Carbide

Product Description

The SGS 66479 is a solid carbide screw machine length drill bit designed for high-performance drilling in a wide range of workpiece materials. Built to DIN 6537 standards, it features a 0.4291-inch (10.90 mm) cutting diameter, a 135-degree standard point angle, and a web-thinned tip geometry that reduces thrust and improves centering at entry. The two-flute regular spiral configuration evacuates chips efficiently, while the coated proprietary finish extends cutting edge life in demanding production environments. At 4.016 inches overall length, the stub-length body provides rigidity that minimizes deflection and runout during aggressive feeds.

This drill bit is suited for production machining, maintenance shops, and toolroom applications where a compact, rigid drill is needed for through-hole and blind-hole work. The straight cylindrical shank seats directly in standard drill chucks and collet holders without adapters. Coolant-through capability supports flood or high-pressure internal coolant delivery, making this bit appropriate for CNC machining centers and drill presses running continuous-cycle programs. The Series 142P designation places it within SGS high-performance solid carbide stub-length drills intended for universal material applications.

Key Features

• Solid micrograin carbide construction for high rigidity and wear resistance
• 135-degree standard point angle with web-thinned geometry for reduced entry thrust
• Coolant-through design supports internal high-pressure coolant delivery
• Two-flute regular spiral configuration promotes efficient chip evacuation
• Four margins provide enhanced bore quality and hole straightness
• DIN 6537 specification for consistent dimensional compliance
• Proprietary coating extends tool life across universal workpiece materials

Compatibility

Designed as a direct-fit replacement for Series 142P screw machine length solid carbide drill bits with a 0.4291-inch cutting diameter and straight cylindrical shank; fits standard drill chucks and collet toolholders accepting an 11.999 mm shank diameter.

Installation Notes

Installation should be performed by a qualified machinist or toolroom technician. Ensure the machine spindle is fully stopped and the tool is secured with correct torque in a matching collet or chuck before initiating a cut. Verify coolant delivery lines are connected and flowing before engaging coolant-through operation. Do not exceed the rated maximum drilling depth of 2.165 inches per pass without retracting to clear chips.