Guhring 9003050024900 Cobalt Jobber Drill Bit 0.0980 in

Product Description

The GUHRING 9003050024900 is a cobalt jobber-length drill bit designed for drilling through ferrous metals, stainless steel, and other hard materials where high-speed steel tooling falls short. It carries a 0.0980-inch (wire size 40) diameter with a 118-degree cone relief point for accurate starting and clean hole entry. The bright, uncoated finish suits general-purpose production and maintenance drilling. The web-thinned geometry reduces thrust load at the point, easing penetration in tougher stock. Machinists, toolmakers, and maintenance technicians install this bit in standard drill chucks on benchtop drill presses, CNC drilling centers, and hand drills.

This bit is sized to wire gauge 40 (0.0980 inches) and falls within the 0.0500-to-0.1000-inch diameter range typical of fine-hole work. Applications include pilot drilling, through-hole drilling in mild steel and stainless, and precision work in fabrication and MRO environments. The spiral flute with regular helix and right-hand cut is compatible with conventional drill press and machine-tool setups. The 2-flute configuration supports chip evacuation in short-to-medium depth holes consistent with a 5xD flute-to-diameter ratio.

Key Features

• Cobalt construction for heat resistance and extended tool life in hard and abrasive materials
• 118-degree cone relief point with web thinning reduces entry thrust and improves centering
• Bright, uncoated finish for general-purpose use without coating compatibility concerns
• Right-hand spiral flute promotes efficient chip evacuation in standard rotation setups
• Conforms to DIN specification for dimensional consistency
• Wire size 40 designation for direct use with standard wire-gauge drill charts

Compatibility

Designed as a general-purpose replacement or stock drill bit for wire-size 40 applications; fits any standard drill chuck or collet accepting a 0.0980-inch (2.49 mm) shank diameter.

Installation Notes

Install in a properly sized drill chuck or collet and verify runout before drilling. Secure the workpiece firmly before operation to prevent walking or chatter on entry. Cobalt bits generate significant heat in interrupted cuts — reduce feed rate and apply cutting fluid when drilling stainless or work-hardened materials. Coolant-through is not supported on this bit, so external lubrication is the correct method.