Guhring 9055200107200 Cobalt Stub Drill Bit 27/64 in

Product Description

The GUHRING 9055200107200 is a cobalt stub-length drill bit in the Series 5520 line, designed for fast, accurate hole-making in metalworking applications. It measures 27/64 inch (0.4219 inches) in diameter with an overall length of 89 millimeters (approximately 3.5 inches) and a flute length of 43 millimeters (approximately 1.69 inches). The 118-degree four facet split point geometry reduces walking and thrust load at entry, while the web-thinned, tapered web construction improves chip evacuation. The straight-cylindrical shank measures 10.72 millimeters in diameter and fits standard drill chucks. This bit is manufactured to DIN 1897 standards and carries a diameter tolerance of plus 0.000 to minus 0.027 millimeters.

This stub-length drill bit is suited for production and maintenance work where rigidity matters more than reach. Primary workpiece material is aluminum, though cobalt construction supports use across a range of metals and harder alloys. The 3xD flute-to-diameter ratio and right-hand spiral flutes keep chip clearance efficient during through-hole and blind-hole operations. Machinists, tool and die technicians, and maintenance mechanics working in manufacturing, HVAC fabrication, or sheet metal will find this bit appropriate for use in drill presses, CNC machining centers, and handheld power drills with adequate chuck capacity.

Key Features

• Cobalt tool material for elevated heat and wear resistance during metal drilling
• 118-degree four facet split point reduces center walking and entry thrust
• Web-thinned tapered web improves chip flow and reduces cutting resistance
• DIN 1897 stub-length specification provides added rigidity versus jobber-length bits
• Maximum drilling depth of 1.2170 inches (30.92 millimeters)
• Right-hand cut with regular spiral flute pattern for standard rotating spindle use

Compatibility

Designed as a DIN 1897-specification stub-length replacement drill bit for use with standard straight-shank drill chucks accommodating a 10.72 millimeter shank diameter. Consult machine tooling specifications to confirm chuck capacity before installation.

Installation Notes

Installation and use should be performed by a qualified machinist or maintenance technician familiar with rotating cutting tools and machine tool safety. Ensure the drill press, CNC spindle, or handheld drill is fully powered down and locked out before changing bits. Secure the shank fully in the chuck and verify runout before beginning a cut. Follow applicable shop safety standards and wear appropriate eye and hand protection when operating drilling equipment.