Guhring 9006640050000 Jobber Drill Bit 5mm Lh Tin Hss

Product Description

The GUHRING 9006640050000 is a jobber-length drill bit designed for general-purpose drilling in cast iron and steel. Built from high speed steel with a titanium nitride (TiN) coating, it offers improved wear resistance compared to uncoated HSS tooling. The bit features a left-hand cutting direction, a 118-degree cone relief point, and a web-thinned tip for reduced thrust during entry. Overall length is 86 mm (approximately 3.39 inches) with a flute length of 52 mm (approximately 2.05 inches). Shank diameter matches the cutting diameter at 5 mm (0.1969 inches), fitting standard drill chucks. Intended for use by machinists, tool-and-die tradespeople, and maintenance technicians.

This drill bit is suited for production and maintenance drilling applications in cast iron and steel workpieces. The left-hand cutting direction makes it particularly useful for removing broken fasteners and studs, since the cutting action can back out a damaged bolt while drilling. Maximum drilling depth is 44.50 mm (1.752 inches). The 5xD flute-to-diameter ratio and regular spiral flute geometry support chip evacuation in through-hole and blind-hole operations. Meets DIN 338 standards for jobber-length drill geometry.

Key Features

• Left-hand cut direction aids broken-fastener extraction in steel and cast iron
• TiN coating extends tool life versus uncoated HSS in abrasive materials
• Web-thinned 118-degree cone relief point reduces entry thrust
• Straight-cylindrical shank (5 mm) fits standard drill chucks without adapters
• DIN 338 compliant jobber-length geometry with h8 diameter tolerance
• Two-flute regular spiral design supports chip clearing in deep holes

Compatibility

Designed as a general-purpose jobber-length drill bit for use in standard drill chucks, drill presses, and CNC machining centers accepting straight-cylindrical shanks. Primary workpiece materials are cast iron and steel.

Installation Notes

This bit is installed and operated by machinists or maintenance technicians using a keyed or keyless drill chuck rated for the spindle speed appropriate to the material and diameter. Ensure the work piece is securely fixtured before drilling. For broken-fastener removal, confirm the fastener is accessible and the surrounding material can accept drill entry before starting. Follow shop safety practices including eye protection and appropriate spindle RPM for the material being drilled.