Guhring 9055240053000 Stub Cobalt Drill Bit 0.2087 in

Product Description

The GUHRING 9055240053000 is a stub-length (screw machine length) cobalt drill bit designed for high-productivity drilling in metal fabrication and machining applications. Built to DIN 1897 standards, this bit measures 0.2087 inches (5.30 mm) in diameter with an overall length of 62.00 mm and a flute length of 26.00 mm. The cobalt (M35 grade) construction provides heat resistance and edge retention when drilling harder materials. A four-facet, split-point tip at 118 degrees reduces walking and allows for faster penetration with less feed pressure. The web-thinned, tapered web design further reduces cutting resistance, making this a reliable choice for production drilling environments.

This stub-length drill bit is suited for CNC machining centers, drill presses, and hand-held power tools where a shorter flute length provides added rigidity and reduced deflection. The straight-cylindrical shank seats securely in standard drill chucks. Primary workpiece material is listed as aluminum, though the M35 cobalt steel construction is also appropriate for a range of ferrous and non-ferrous materials. Maximum drilling depth is 0.711 inches (18.05 mm), and the flute-to-diameter ratio is 3xD. This bit is sold individually and is intended for professional machining and trade use.

Key Features

• M35 cobalt steel construction for heat resistance and extended tool life
• 118-degree four-facet split point reduces bit walking and entry burring
• Web-thinned tapered web lowers cutting force and improves chip evacuation
• Stub length (DIN 1897) design adds rigidity and reduces deflection in short-reach applications
• Bright/uncoated finish for straightforward resharpening in the field
• Right-hand cut with regular spiral fluting for standard drilling operations

Compatibility

Designed as a DIN 1897 stub-length replacement drill bit compatible with standard straight-shank drill chucks in CNC machines, drill presses, and portable power tools accepting a 5.30 mm straight-cylindrical shank. Part of the GUHRING Series 5524.

Installation Notes

Installation and tool changes should be performed by a qualified machinist or trade professional with the machine powered down and locked out per applicable safety procedures. Ensure the chuck is clean and the shank is fully seated before tightening. Verify spindle speed and feed rate are appropriate for the workpiece material before drilling. Do not exceed the maximum drilling depth of 0.711 inches without retracting to clear chips.