Guhring 9055240130000 Cobalt Stub Drill Bit 0.5118in

Product Description

The GUHRING 9055240130000 is a cobalt (M35) stub-length drill bit with a 13.00 mm (0.5118 inch) diameter, built to Series 5524 and conforming to DIN 1897. The four-facet split point reduces walking and cutting pressure on entry, while web thinning lowers thrust requirements across the full drilling depth. With a 118-degree point angle and regular spiral flutes, this bit delivers consistent chip evacuation in short-reach drilling applications. It is intended for use by machinists, maintenance technicians, and trade professionals working in production or field environments.

This stub-length drill is optimized for applications where rigidity matters more than reach — close-tolerance work in machine fixtures, jig drilling, and high-volume hole operations. Its primary listed workpiece material is aluminum, though the M35 cobalt steel construction handles a range of non-ferrous and ferrous materials. The straight-cylindrical shank seats in standard drill chucks and collet systems without adapters. The 3xD flute-to-diameter ratio keeps the bit stiff and accurate at depth.

Key Features

• M35 cobalt steel construction for heat resistance and extended tool life
• Four-facet split point with web thinning reduces entry thrust and prevents walking
• 118-degree point angle suits aluminum and general-purpose drilling
• Stub (screw machine) length provides added rigidity over jobber-length bits
• Regular spiral flutes with tapered web for efficient chip removal
• Conforms to DIN 1897 standard; straight-cylindrical shank fits standard chucks

Compatibility

Designed as a DIN 1897 stub-length replacement drill bit suitable for standard drill chucks and collet holders accepting a 13.00 mm straight-cylindrical shank.

Installation Notes

Installation and use should be performed by qualified machinists or maintenance technicians familiar with rotating cutting tools. Secure the shank fully in the chuck or collet before operation and verify runout is within acceptable limits. Always wear appropriate eye protection and ensure workpieces are clamped before drilling. Do not exceed the recommended drilling depth of 1.24 inches (31.50 mm) for this stub-length geometry.