Guhring 9055200039700 Cobalt Stub Drill Bit 5/32 in

Product Description

The GUHRING 9055200039700 is a cobalt stub-length (screw machine length) drill bit designed for high-speed drilling in demanding shop and field applications. Built to DIN 1897 standards, it features a 5/32 inch (0.1562 inch) diameter with a two-flute spiral configuration and a four facet, split point tip ground to 118 degrees. The web-thinned, tapered-web construction reduces thrust load and improves centering accuracy on entry. At 55.00 mm overall length with a 22.00 mm flute length, this is a compact, rigid bit suited to close-quarters work and machine setups where a jobber-length bit would flex or chatter.

This bit is suited to production drilling, maintenance, and repair operations on aluminum and similar non-ferrous workpiece materials, though cobalt construction also provides the heat resistance needed when working harder materials. The straight-cylindrical shank with a 3.97 mm diameter seats securely in standard drill chucks, CNC turrets, and screw machine spindles. It is a single-unit replacement buy, packaged individually, and conforms to Series 5520 geometry for consistent results across repeat setups. Machinists, tool-and-die techs, and industrial maintenance professionals are the primary users of this bit.

Key Features

• Cobalt tool material for elevated heat resistance compared to standard high-speed steel
• Four facet split point at 118 degrees for fast penetration and self-centering entry
• Web-thinned tapered web reduces axial thrust and chip packing
• Stub length (DIN 1897) provides added rigidity over jobber-length alternatives
• Right-hand spiral flute with regular helix for efficient chip evacuation
• Straight-cylindrical shank compatible with standard drill chucks and machine spindles

Compatibility

Designed as an OEM-style replacement stub-length drill bit conforming to DIN 1897 and Series 5520 geometry; fits any drill chuck or machine spindle accepting a straight-cylindrical 3.97 mm shank.

Installation Notes

Installation is performed by machinists or maintenance technicians using standard drill chuck keys or toolless quick-change systems as applicable to the machine. Ensure the spindle is fully de-energized and locked out before changing tooling. Secure the shank fully in the chuck to the maximum grip depth to prevent runout and shank pull-out under load. Do not use this bit beyond its maximum drilling depth of 0.6320 inch (16.05 mm) per pass without retracting to clear chips.