Guhring 9005520107200 Screw Machine Drill Bit 27/64

Product Description

The GUHRING 9005520107200 is a screw machine length (stub length) drill bit designed for high-volume drilling in metal fabrication, machining, and production environments. Manufactured from high-speed steel (HSS) with a bright/uncoated finish, this bit features a parabolic flute geometry and a web-thinned, cone-relief point that reduces thrust and improves chip evacuation at the start of the cut. The 130-degree point angle suits steel, aluminum, and non-ferrous materials. At 3.75 inches overall length with a 1.4375-inch flute, the stub configuration provides rigidity and minimizes deflection in short-reach drilling applications. This bit conforms to DIN 1897 standards and carries a high-performance grade designation from the manufacturer.

This drill bit is suited for use in drill presses, CNC machining centers, and manual screw machines where a rigid, short-length tool is required. The parabolic fast-spiral flute design promotes efficient chip removal during deep-feed passes, making it a practical choice for production drilling in steel and aluminum workpieces. A straight cylindrical shank at 0.4219 inches diameter fits standard drill chucks and collet holders without modification. The maximum drilling depth is 1.217 inches, appropriate for through-hole and blind-hole work within stub-length reach.

Key Features

• HSS construction with bright/uncoated finish for general-purpose metal drilling
• 130-degree cone-relief point with web thinning reduces entry thrust and centers the cut
• Parabolic fast-spiral flute promotes chip evacuation in steel and aluminum
• Stub/screw machine length body provides superior rigidity over jobber-length equivalents
• Straight cylindrical shank at 0.4219 inches fits standard chucks and collets
• Conforms to DIN 1897 specification for consistent dimensional standards

Compatibility

Designed as a DIN 1897 stub-length replacement or production drill for use in standard drill chucks, collet holders, and screw machine spindles accepting a 0.4219-inch straight shank. Primary workpiece materials include steel, aluminum, and non-ferrous alloys.

Installation Notes

This bit is installed and serviced by machinists and tool-room technicians. Secure the shank fully in the chuck or collet before operation and verify runout before beginning production runs. Always power down and de-energize the machine spindle before changing tooling. Do not exceed the recommended maximum drilling depth of 1.217 inches for this stub-length configuration.