Guhring 9007300029500 Carbide Stub Drill Bit 0.116 in

Product Description

The GUHRING 9007300029500 is a solid carbide screw machine length (stub) drill bit designed for precise, high-performance drilling in production and machining environments. Built to DIN 6539 standards, this Series 730 bit features a 0.116 inch (Wire Size 32) diameter, a 118-degree faceted point angle, and a web-thinned tip geometry that reduces thrust and improves hole entry. The micrograin carbide substrate delivers hardness and edge retention well beyond standard high-speed steel tooling. It is suited for machinists, toolroom operators, and CNC machine operators working with aluminum and similar non-ferrous materials.

This stub-length drill bit fits applications where a shorter flute length provides rigidity and reduced deflection — typical in screw machine work, CNC drilling, and close-tolerance production drilling. The straight-cylindrical shank accepts standard drill chucks and collet-style toolholders. Primary workpiece material is aluminum, though the general-purpose grade makes it viable across a range of softer metals and plastics. Maximum drilling depth is 0.456 inches (11.58 mm), consistent with a 3xD flute-to-diameter ratio.

Key Features

• Solid micrograin carbide construction for superior wear resistance and edge life
• 118-degree faceted point with web thinning for reduced entry thrust and accurate hole positioning
• Regular spiral, 2-flute design promotes chip evacuation in aluminum and soft metals
• Stub (screw machine) length provides extra rigidity and minimizes deflection
• Bright/uncoated finish — no coating buildup risk on cutting edge; compatible with cutting fluids
• Conforms to DIN 6539 standard; diameter tolerance h8 for consistent fit in toolholders

Compatibility

Designed as an OEM-style replacement or production drill bit for use in standard drill chucks and collet toolholders accepting a straight-cylindrical shank with a 2.95 mm shank diameter, across screw machines, CNC machining centers, and general-purpose drill presses.

Installation Notes

Installation and tool changes should be performed by a qualified machinist with the machine in a fully de-energized, locked-out state per applicable machine safety procedures. Ensure the toolholder or collet is clean and undamaged before seating the straight-cylindrical shank, and confirm proper seating depth before resuming operation. Carbide tooling is brittle — avoid impact loading, side loading beyond design parameters, or use in interrupted cuts without verifying suitability. Apply appropriate cutting fluid for the workpiece material to extend tool life and maintain hole quality.