Guhring 9055240042200 Stub Drill Bit Size 19 Cobalt

Product Description

The GUHRING 9055240042200 is a cobalt (M35 grade) stub-length drill bit in wire gauge Size 19 (0.1660 inches decimal), designed for fast, accurate drilling in metalworking and machining applications. Built to DIN 1897 standards, it features a 118-degree four-facet split point that reduces walking and cutting pressure at entry. The two-flute spiral design with web thinning promotes efficient chip evacuation in short-depth holes. At 2.165 inches overall length with a straight-cylindrical shank, this bit seats securely in standard drill chucks and screw-machine setups. The cobalt construction handles elevated heat better than standard HSS, making it a reliable choice for production drilling environments.

This stub-length bit is suited for screw machine work, CNC drilling operations, and bench drill press use where rigidity and minimal deflection matter. The shortened flute length (22.00 mm) and overall stub geometry reduce runout in close-tolerance applications. Primary workpiece material per the manufacturer specification is aluminum, though the M35 cobalt alloy also performs on mild steel, brass, and similar materials. The 3xD flute-to-diameter ratio and tapered web configuration support controlled chip flow in blind and through holes up to 15.67 mm maximum drilling depth.

Key Features

• M35 cobalt construction for improved heat and wear resistance over standard HSS
• 118-degree four-facet split point reduces thrust force and prevents bit walking
• Web-thinned, tapered web for easier chip clearance in short-depth holes
• DIN 1897 specification for consistent dimensional accuracy
• Straight-cylindrical shank fits standard drill chucks without adapters
• Bright/uncoated finish — no coating to flake or delaminate under heat

Compatibility

Designed as a DIN 1897 stub-length replacement drill bit for screw machine, CNC, and bench drilling applications requiring a Size 19 (0.1660 inch) cobalt drill with a straight-cylindrical shank.

Installation Notes

Installation should be performed by a qualified machinist or tool-and-die technician. Secure the shank fully in a keyed or keyless chuck before operation and verify runout is within acceptable tolerance for the application. Always wear appropriate eye protection and follow facility lockout/tagout procedures when changing tooling in powered equipment. Do not exceed the recommended maximum drilling depth of 15.67 mm for this stub-length geometry.