Sgs 66653 Taper Length Drill Bit 7.7mm Solid Carbide

Product Description

The SGS 66653 is a taper length drill bit engineered for high-performance metal cutting and universal material applications. Built from micrograin solid carbide with a Ti-NAMITE-X (TX) coating, this bit delivers extended tool life and heat resistance in demanding drilling operations. It features a 135-degree split point for self-centering starts and reduced thrust, a right-hand spiral flute for efficient chip evacuation, and a web-thinned tip to ease penetration. The 7.7 mm diameter and 5-19/32 inch overall length place it in the taper length category, making it suitable for reaching deeper into workpieces than a jobber-length bit. Installed by machinists and maintenance technicians alike, this bit fits standard CNC machining centers, drill presses, and hand-held drill motors with a straight cylindrical shank.

The SGS 66653 is designed for universal material applications including steel, stainless steel, cast iron, and non-ferrous alloys. Its Series 142P geometry conforms to DIN 6537 specification, making it a fit for shops that hold DIN-standard tooling. The 8xD flute-length-to-diameter ratio and 76 mm flute length support deep-hole drilling cycles where chip clearance and rigidity are both critical. This bit is appropriate for production machining, tool rooms, and job shops requiring consistent hole-diameter tolerance across multiple operations.

Key Features

• Micrograin solid carbide construction for rigidity and edge retention
• Ti-NAMITE-X (TX) coating reduces friction and extends tool life in high-speed applications
• 135-degree standard split point minimizes walking and reduces entry thrust
• Web-thinned tip improves chip flow and lowers cutting force
• Coolant-through design supports internal coolant delivery for deep-hole operations
• Conforms to DIN 6537 specification for dimensional consistency

Compatibility

Designed as a DIN 6537 Series 142P taper length drill bit with a straight cylindrical shank, this bit seats in any standard drill chuck or collet system sized for a 7.7 mm shank diameter on CNC machining centers, drill presses, and similar drilling equipment.

Installation Notes

Installation and tool changes should be performed with the machine fully powered down and the spindle at a complete stop. A licensed machinist or qualified tooling technician should verify chuck or collet runout before securing the bit, as excessive runout accelerates wear and affects hole-diameter tolerance. When using the coolant-through feature, confirm that coolant pressure and flow rate are within the machine specification before initiating a cut. Follow applicable OSHA machine-guarding requirements and shop safety protocols during all tooling operations.