Guhring 9055190061500 Cobalt Jobber Drill Bit Letter C

Product Description

The GUHRING 9055190061500 is a cobalt jobber-length drill bit sized to Letter C (0.2420 inches) with a titanium nitride (TiN) coating. Built to DIN 338 standards and manufactured from M35 cobalt steel, it delivers increased heat and wear resistance compared to standard high-speed steel bits. The 118-degree, four-facet split-point geometry reduces walking on entry and lowers thrust requirements. With an overall length of 101 mm and a two-flute regular spiral configuration, this bit is suited for production drilling environments where consistent hole quality and tool life are critical. Licensed machinists and metalworking tradespeople are the primary users.

This drill bit is designed for use across a range of workpiece materials. Its DIN 338 material codes cover aluminum and non-ferrous metals (N), austenitic stainless and heat-resistant alloys (M), and long-chipping carbon and alloy steels (P and K classifications). The TiN coating adds surface hardness and reduces friction, making it effective in interrupted cuts and repetitive production runs. The straight-cylindrical shank seats in standard drill chucks found on drill presses, CNC machining centers, and handheld power drills.

Key Features

• M35 cobalt steel construction for elevated heat resistance over standard HSS
• Titanium nitride (TiN) coating reduces friction and extends cutting edge life
• 118-degree four-facet split point with web thinning for self-centering entry
• DIN 338 standard jobber length with 5xD flute-to-diameter ratio
• Two-flute regular spiral geometry promotes chip evacuation in through-holes
• Straight-cylindrical shank fits standard drill chucks without adapters

Compatibility

Designed as an OEM-style replacement or direct-use drill bit compatible with any standard drill chuck accepting a 6.15 mm straight-cylindrical shank. Suitable for workpiece material groups K, M, N, and P per DIN classification.

Installation Notes

Secure the shank fully in the chuck before operation and verify chuck key is removed prior to powering the spindle. For best results on steel and stainless applications, use an appropriate cutting fluid to manage heat at the cutting edge. Inspect the drill point for chipping or wear before each use, particularly after drilling hardened or abrasive materials. Regrinding should be performed by qualified toolroom personnel to maintain the four-facet geometry.