Guhring 9055240035000 Cobalt Stub Drill Bit 0.1378 in

Product Description

The GUHRING 9055240035000 is a cobalt stub-length (screw machine length) twist drill bit built for high-productivity drilling in metalworking and fabrication environments. Manufactured to DIN 1897 standards, the bit features a 3.50 mm (0.1378 inch) diameter, a 118-degree four-facet split point, and an M35 cobalt steel construction. The web-thinned, tapered web design reduces thrust force at entry, while the regular spiral flute geometry promotes efficient chip evacuation. This bit is installed and used by machinists, maintenance technicians, and metalworking professionals in production and repair settings.

The 9055240035000 is suited for drilling aluminum and similar non-ferrous workpiece materials where heat resistance and edge retention are priorities. The stub-length body — 52.00 mm overall length with a 20.00 mm flute length — provides added rigidity compared to jobber-length bits, making it a good fit for drill press, CNC, or turret lathe applications where deflection control matters. Maximum drilling depth reaches 0.5810 inches (14.75 mm) at a 3xD flute-to-diameter ratio. The straight-cylindrical shank seats cleanly in standard drill chucks and collet holders.

Key Features

• M35 cobalt steel construction for elevated heat resistance and extended tool life
• Four-facet split point reduces walking and lowers entry thrust force
• Web-thinned tapered web minimizes cutting resistance at the chisel edge
• Stub-length body increases rigidity and reduces deflection in tight setups
• Bright/uncoated finish — no coating buildup to affect dimensional tolerance
• Manufactured to DIN 1897 standard with diameter tolerance of +0.000 to -0.018 mm

Compatibility

Designed as a DIN 1897 stub-length replacement drill bit suitable for standard drill chucks and collet holders accepting a 3.50 mm straight-cylindrical shank.

Installation Notes

Installation is performed by machinists or maintenance technicians. Secure the shank fully in a properly sized drill chuck or collet before operation; verify runout before beginning a production run. Always power down and lock out the machine before changing tooling. Follow applicable shop safety standards and machine manufacturer guidelines for spindle speed and feed rate selection based on workpiece material.