Guhring 9055200071400 Cobalt Stub Drill Bit 9/32 in

Product Description

The GUHRING 9055200071400 is a cobalt stub-length (screw machine length) drill bit designed for high-performance drilling in production and maintenance environments. Built to DIN 1897 standards, this Series 5520 bit features a 9/32-inch (0.2812-inch) diameter with a 118-degree four-facet split point and web thinning for fast, accurate starts with reduced feed pressure. The two-flute spiral design runs right-hand cut with a straight-cylindrical shank measuring 7.14 mm in diameter. Overall length is 74 mm (approximately 2.91 inches) with a flute length of 34 mm (approximately 1.34 inches). The cobalt construction provides heat resistance suitable for harder alloys and continuous-duty applications.

This drill bit is well suited for general metalworking, maintenance shops, and production drilling where stub-length rigidity reduces deflection in short-reach setups. The four-facet split point with web thinning improves chip clearance and entry precision on materials including aluminum and similar non-ferrous metals. The 3xD flute-to-diameter ratio and tapered web configuration support consistent chip evacuation at standard drill press and hand-drill feed rates. Maximum drilling depth is 0.917 inches (23.29 mm). This bit is packaged and sold as a single unit.

Key Features

• Cobalt tool material for elevated heat resistance and extended tool life in demanding applications
• 118-degree four-facet split point with web thinning for self-centering starts and reduced thrust force
• Stub (screw machine) length body improves rigidity and reduces deflection in tight or short-reach drilling
• Right-hand spiral flute with tapered web and 3xD ratio for consistent chip evacuation
• Straight-cylindrical shank compatible with standard drill chucks
• Manufactured to DIN 1897 specification with diameter tolerance of +0.000 to -0.022 mm

Compatibility

Designed as an OEM-style replacement and standard production drill bit for use with any drill press, CNC drilling center, or hand drill equipped with a standard straight-shank chuck accepting a 7.14 mm shank diameter. Primary workpiece material rating is aluminum; suitable for general non-ferrous and softer ferrous applications consistent with cobalt stub-drill usage.

Installation Notes

Installation and use should be performed by machinists, toolroom technicians, or qualified maintenance trades familiar with rotating cutting tools. Secure the shank fully in the chuck and verify concentricity before drilling. Always wear appropriate eye protection and secure the workpiece before operation. Do not exceed the recommended maximum drilling depth of 0.917 inches without retracting to clear chips.