Guhring 9055200100000 Cobalt Stub Drill Bit 0.3937 in

Product Description

The GUHRING 9055200100000 is a cobalt stub-length drill bit designed for high-performance drilling in demanding shop and field applications. Built to DIN 1897 standards, it features a 0.3937 inch (10.00 mm) diameter with a matching 10.00 mm straight-cylindrical shank. The 118-degree four-facet split point geometry reduces walking and improves centering on entry. A web-thinned, tapered web construction lowers thrust requirements. The two-flute regular spiral design promotes chip evacuation. This bit is suited for machinists, tool-and-die technicians, and production drilling operators who require a compact, rigid cutter in tight clearance situations.

The 9055200100000 is intended for drilling aluminum and comparable non-ferrous and ferrous workpiece materials where a short, stiff drill body reduces deflection and improves hole accuracy. The stub-length format makes it well suited for screw machine, CNC, and manual lathe work where overhanging tool length must be minimized. Maximum drilling depth is 1.1020 inches (28.00 mm), and the flute-to-diameter ratio is 3xD, providing adequate chip clearance within that depth range.

Key Features

• Cobalt tool material for improved heat and wear resistance over standard HSS
• 118-degree four-facet split point reduces drill walk and entry thrust
• Web-thinned tapered web lowers cutting force requirements
• Stub-length body provides rigidity and minimizes deflection in short-reach setups
• Right-hand cut, two-flute regular spiral flute for efficient chip removal
• Manufactured to DIN 1897 specification for consistent dimensional tolerances

Compatibility

Designed as an OEM-style replacement or standard tooling selection within GUHRING Series 5520, conforming to DIN 1897 stub-length drill bit standards. Fits any spindle or chuck accepting a 10.00 mm straight-cylindrical shank.

Installation Notes

Installation and use should be performed by qualified machinists or tooling technicians familiar with drill press, CNC machining center, or screw machine setup. Secure the shank fully in a collet or drill chuck before operation and verify runout is within acceptable limits. Do not exceed the recommended maximum drilling depth of 1.1020 inches per plunge without retracting to clear chips. Ensure the workpiece is properly fixtured and the spindle is at a complete stop before changing or adjusting tooling.