Guhring 9055110100000 Carbide Jobber Drill Bit 0.3937in

Product Description

The GUHRING 9055110100000 is a solid carbide jobber-length drill bit designed for precision hole-making in demanding industrial and metalworking applications. Built to DIN 6537L standards, it features a 140-degree split-point (SU) geometry with web thinning for self-centering entry, reducing the need for a center punch on most setups. The bit carries a FIREX coating for improved wear resistance and heat dissipation at the cutting edge. At 0.3937 inches in diameter with a 4.0551-inch overall length, it is sized for production drilling in cast iron and steel. Coolant-through capability supports high-feed operations where chip evacuation and thermal management are critical.

This drill bit is suited for CNC machining centers, drill presses, and other machine-tool setups running production volumes in metal fabrication, tool and die, automotive, and industrial manufacturing environments. The straight-cylindrical shank fits standard collets and chucks without modification. Its 5xD flute-to-diameter ratio and regular spiral flute geometry make it appropriate for medium-depth holes in cast iron and steel workpieces where surface finish and dimensional accuracy are required. Machinists and toolroom professionals working with P- and K-category materials per ISO classification will find this geometry well matched to those applications.

Key Features

• Solid carbide submicron-grade construction for rigidity and edge retention in hard materials
• FIREX coating reduces friction and extends tool life in ferrous materials
• 140-degree SU split-point with web thinning enables self-centering without a pilot hole
• Coolant-through design supports chip evacuation and thermal control at depth
• Right-hand cut, regular spiral flute with tapered web configuration
• Meets DIN 6535 and DIN 6537 L standards for consistent dimensional accuracy

Compatibility

Designed for use in cast iron and steel workpieces (ISO material groups K and P). Fits standard straight-cylindrical collets and chucks accepting a 0.3937-inch shank diameter. Conforms to DIN 6537L Series 5511 specifications.

Installation Notes

Installation and operation of carbide drill bits should be performed by qualified machinists familiar with speeds, feeds, and machine-tool setup for carbide tooling. Secure the shank fully in the collet or chuck before operation and verify runout is within acceptable limits, as carbide is brittle and sensitive to lateral loading. Coolant-through capability requires a machine spindle with internal coolant delivery to be active. Do not use this bit for freehand drilling or in handheld equipment.