Guhring 9007300027800 Solid Carbide Stub Drill Bit 7/64

Product Description

The GUHRING 9007300027800 is a solid carbide stub-length (screw machine length) drill bit designed for precision drilling in general-purpose and aluminum machining applications. Built to DIN 6539 standards, it features a micrograin carbide construction that provides rigidity and edge retention well beyond what high-speed steel tooling offers at this diameter. The 7/64 inch (0.1094 inch) diameter bit carries a 118-degree faceted point angle and a web-thinned tip geometry that reduces entry force and improves hole accuracy. At an overall length of 46.00 mm and a flute length of 16.00 mm, this stub-length design minimizes deflection in short-reach drilling operations.

This drill bit is suited for use in CNC machining centers, drill presses, and manual machine tools where a short, stiff cutting tool is required. The straight-cylindrical shank with an h8 diameter tolerance seats consistently in standard drill chucks and collet systems. Primary target workpiece material is aluminum, though the general-purpose grade carbide handles a range of non-ferrous and softer ferrous materials. The Series 730 designation places it within a line of stub-length carbide drills built to DIN 6539 dimensional and performance specifications. The 3xD flute-to-diameter ratio and regular spiral flute type promote chip evacuation without sacrificing rigidity at this small diameter.

Key Features

• Solid micrograin carbide construction for rigidity and edge retention at 0.1094 inch diameter
• 118-degree faceted point with web thinning reduces entry force and improves positional accuracy
• Stub length (46.00 mm overall) minimizes deflection in close-tolerance applications
• Straight-cylindrical shank to h8 tolerance for consistent chuck and collet seating
• Right-hand cut, regular spiral flute for reliable chip evacuation in aluminum and general-purpose materials
• Built to DIN 6539 specification for dimensional conformance

Compatibility

Designed as a DIN 6539 Series 730 stub-length carbide drill bit for use in standard drill chucks and collet holders accepting a 2.78 mm straight-cylindrical shank across CNC and manual machine tool platforms.

Installation Notes

Installation and use of this tooling should be performed by qualified machinists or tooling technicians familiar with small-diameter carbide drill practices. Ensure the spindle and workpiece are properly secured before engaging the tool, as carbide bits at this diameter are brittle and susceptible to breakage from side loading or interrupted cuts. Match spindle RPM and feed rate to the workpiece material per standard machining reference data for carbide tooling. Do not use this bit in hand-held power drills where runout and lateral force cannot be controlled.