Guhring 9007300034500 Carbide Stub Drill 0.136 in

Product Description

The GUHRING 9007300034500 is a solid micrograin carbide stub-length (screw machine length) drill bit engineered for general-purpose drilling applications. With a 0.136 inch diameter corresponding to wire gauge size #29, it features a 118-degree faceted point angle and a web-thinned tip that reduces entry force and improves hole-starting accuracy. The straight-cylindrical shank measures 3.45 mm in diameter, allowing direct chuck mounting. Manufactured to DIN 6539 standards with an h8 diameter tolerance, this bit is suited for machinists, tool-and-die technicians, and maintenance professionals who require consistent, precise hole geometry in tight-tolerance work.

This drill bit is primarily intended for drilling aluminum and similar non-ferrous materials, though its general-purpose grade also supports use in plastics and softer alloys. The stub-length body keeps the bit rigid and minimizes deflection in short-hole applications, making it a practical choice for screw machine operations, drill press work, and CNC setups where limited clearance or reduced overhang is required. The bright uncoated finish suits applications where coating compatibility with the workpiece material or cutting fluid is a consideration.

Key Features

• Solid micrograin carbide construction for wear resistance and edge retention
• 118-degree faceted point with web thinning for reduced thrust and accurate hole entry
• Stub (screw machine) length body for increased rigidity and reduced deflection
• Right-hand spiral flute with regular helix for efficient chip evacuation
• Bright uncoated finish compatible with a range of cutting fluids and workpiece materials
• Manufactured to DIN 6539 with h8 diameter tolerance for consistent fit

Compatibility

Designed as an OEM-style general-purpose stub drill bit per DIN 6539 specification, suitable for use in standard drill chucks and collets accepting a 3.45 mm straight-cylindrical shank.

Installation Notes

Installation and use of carbide drill bits should be performed by qualified machinists or maintenance technicians familiar with cutting tool safety practices. Secure the shank fully in the chuck or collet before operation and verify runout before drilling. Carbide is brittle — avoid side loading, interrupted cuts in hard materials, or drop impacts that can cause chipping or fracture. Always use appropriate speeds and feeds for the workpiece material, and ensure the spindle is fully stopped before changing tooling.