Guhring 9055240107200 Stub Cobalt Drill Bit 27/64 in

Product Description

The GUHRING 9055240107200 is a stub-length (screw machine length) cobalt drill bit designed for high-productivity drilling in demanding shop and field applications. Built to DIN 1897 standards, this Series 5524 bit features a 27/64 inch (0.4219 inch) diameter, a 118-degree four-facet split point, and an M35 cobalt steel construction that holds an edge under the heat generated in harder materials. The web-thinned, tapered web geometry reduces thrust and improves chip evacuation. With a maximum drilling depth of 1.217 inches (30.92 mm), this bit is suited for through-hole and blind-hole work where a shorter, more rigid tool is preferred over a jobber-length drill.

This stub-length cobalt drill bit is used in machining, maintenance, and fabrication environments where rigidity and chip control matter. The shorter flute length reduces deflection in drill press, CNC, and handheld power tool applications. Primary workpiece material is aluminum, though the M35 cobalt grade performs across a broad range of non-ferrous and ferrous materials. A straight-cylindrical shank with a 10.72 mm shank diameter seats securely in standard drill chucks and collet holders. Right-hand spiral flutes direct chips away from the cutting zone throughout the drilling cycle.

Key Features

• M35 cobalt steel construction for extended tool life in abrasive and work-hardening materials
• Four-facet split point with web thinning reduces walking and lowers thrust requirements
• DIN 1897 stub length provides increased rigidity versus jobber-length drills
• Bright/uncoated finish on straight-cylindrical shank for precise chuck fit
• 2-flute regular spiral geometry optimized for aluminum and similar materials
• Diameter tolerance of +0.000 to -0.027 mm for consistent, accurate hole sizing

Compatibility

Designed as an OEM-style replacement or direct application stub-length drill bit for use in standard drill chucks and collet holders accepting a straight-cylindrical shank; no specific model or system compatibility was stated in the available product data.

Installation Notes

Installation and use of this bit should be performed by a qualified machinist or maintenance technician familiar with drilling operations. Ensure the drill press, CNC spindle, or handheld tool is fully powered down and the chuck is locked before seating or removing the bit. Inspect the shank and chuck for debris or wear before each use, as contamination can cause runout and premature edge failure. Follow applicable shop safety standards and machine manufacturer guidelines for feed rate and spindle speed selection.