Guhring 9024630063500 Stub Drill Bit 0.25 in Carbide

Product Description

The GUHRING 9024630063500 is a stub-length (screw machine length) solid carbide drill bit with a 0.25 inch (1/4 inch, Letter E) diameter, designed for precision drilling in demanding production and machining environments. It features a 118-degree faceted point angle, a web-thinned tip for reduced entry force, and two regular spiral flutes for efficient chip evacuation. The straight-cylindrical shank measures 6.35 mm in diameter, and the overall length is 2.756 inches. Right-hand cut geometry is standard. This bit is installed by machinists, tool-and-die technicians, and maintenance professionals on drill presses, CNC machining centers, and hand-held power tools.

The 9024630063500 is suited for general-purpose drilling in aluminum and similar non-ferrous workpiece materials. Its stub-length body provides added rigidity compared to jobber-length bits, making it well-suited for applications where deflection control and hole accuracy matter. The 3xD flute-to-diameter ratio and 1.22-inch flute length allow for a maximum drilling depth of 0.846 inches per pass. This bit conforms to DIN 6539 standards and belongs to GUHRING Series 2463, a general-purpose carbide stub drill line targeting production shop environments.

Key Features

• Solid carbide construction in material grade K40 for hardness and wear resistance in non-ferrous materials
• Web-thinned faceted point reduces thrust force and improves centering at entry
• Stub-length body provides greater rigidity and reduced deflection versus jobber-length drills
• 118-degree point angle with right-hand spiral flutes for standard general-purpose drilling
• Conforms to DIN 6539 specification for consistent dimensional accuracy
• Diameter tolerance of +0.000 to -0.010 mm for tight-tolerance hole applications

Compatibility

Designed as an OEM-style replacement or direct substitute for 1/4 inch stub-length carbide drill bits conforming to DIN 6539, Series 2463, with a straight-cylindrical shank compatible with standard 1/4 inch or 6.35 mm drill chucks and collet holders.

Installation Notes

Installation is performed by qualified machinists or maintenance technicians. Secure the straight-cylindrical shank firmly in a properly sized chuck or collet before operation, and verify runout before drilling. Power down and de-energize or lock out the machine spindle before changing bits. Solid carbide bits are brittle compared to high-speed steel — avoid side loading, interrupted cuts at entry, or dropping the tool on hard surfaces.