Guhring 9055240027800 Cobalt Stub Drill Bit 7/64 in

Product Description

The GUHRING 9055240027800 is a cobalt stub-length (screw machine length) drill bit designed for precision drilling in metalworking and machining applications. Built to DIN 1897 standards, it features a 7/64 inch (0.1094 inch) diameter with a four-facet split point at 118 degrees, delivering fast, accurate starts without a center punch. The M35 cobalt material grade provides heat resistance and edge retention well above standard HSS, making this bit a reliable choice for production environments and repair shops where consistent hole quality matters. A bright, uncoated finish suits general-purpose use across a range of workpiece materials.

This stub-length drill bit is sized for applications where a shorter flute length improves rigidity and reduces deflection, particularly in drill press, CNC, and turret lathe setups. Its primary workpiece designation is aluminum, though the cobalt construction handles a broad range of machinable metals. The straight cylindrical shank accepts standard collets and drill chucks, and the right-hand spiral flute geometry evacuates chips efficiently in through-hole and shallow-hole operations. It is a practical pick for machinists, tool-and-die techs, and maintenance professionals who need a dependable stub drill in a common fractional size.

Key Features

• M35 cobalt construction for improved heat resistance and edge retention over standard HSS
• Four-facet split point at 118 degrees for self-centering starts and reduced thrust
• Stub length (DIN 1897) improves rigidity and minimizes deflection in short-reach setups
• Web-thinned, tapered web configuration reduces cutting resistance
• Right-hand spiral flute with regular helix for efficient chip evacuation
• Bright, uncoated finish compatible with standard cutting fluids and coolants

Compatibility

Designed as an OEM-style replacement or production stub drill bit for standard drill chucks and collet systems accepting a 0.1094 inch straight cylindrical shank, conforming to DIN 1897 Series 5524 specifications.

Installation Notes

Installation and use of this drill bit should be performed by qualified machinists or maintenance technicians familiar with rotating cutting tools. Ensure the spindle is fully stopped and the machine is de-energized before inserting or removing the bit from the chuck or collet. Verify shank seating and chuck tightness before beginning a cut. Always use appropriate cutting fluid or coolant for the workpiece material to preserve edge life and maintain dimensional tolerance.