Guhring 9007300080000 Stub Drill Bit 0.315 in Carbide

Product Description

The GUHRING 9007300080000 is a stub-length (screw machine length) solid carbide drill bit designed for precision drilling in general-purpose machining applications. Built to DIN 6539 standards, this bit features a 0.315-inch (8.00 mm) diameter, a 118-degree faceted drill point, and a web-thinned tip that reduces entry force and improves centering accuracy. The micrograin carbide construction delivers the rigidity and wear resistance needed for consistent hole quality in production environments. It is suited for machinists, toolroom technicians, and CNC operators working with tight tolerances and high cycle counts.

This drill bit is optimized for drilling aluminum as its primary workpiece material, though its general-purpose grade makes it applicable across a range of non-ferrous and soft ferrous materials. The stub-length body limits overhang and reduces deflection, making it well suited for short-hole applications on drill presses, machining centers, and turret lathes. The straight-cylindrical shank seats directly in standard collet chucks or drill chucks without adapters. Maximum drilling depth is 0.984 inches (25.00 mm), consistent with the 3xD flute-to-diameter ratio of the Series 730 design.

Key Features

• Solid micrograin carbide construction for extended tool life in high-cycle drilling
• 118-degree faceted point with web thinning for reduced thrust and improved self-centering
• Stub-length body minimizes deflection in short-hole and close-tolerance applications
• Right-hand spiral flute geometry promotes efficient chip evacuation
• Bright/uncoated finish compatible with cutting fluid use on aluminum and non-ferrous materials
• Manufactured to DIN 6539 with h8 diameter tolerance for consistent fit in precision tooling

Compatibility

Designed as an OEM-specification replacement and standard tooling option for machining setups requiring an 8.00 mm (0.315-inch) stub-length carbide drill bit conforming to DIN 6539 Series 730 standards.

Installation Notes

Installation is performed by qualified machinists or CNC tooling technicians. Secure the straight-cylindrical shank in a collet chuck or drill chuck rated for the spindle speed and feed rate of the target material. Power down and lock out the machine spindle before changing tooling. Do not exceed the maximum drilling depth of 0.984 inches in a single pass without a pecking cycle to clear chips and prevent tool breakage.