Guhring 9005520020800 Stub Drill Bit 0.082 in Hss Series 552

Product Description

The GUHRING 9005520020800 is a screw machine length (stub) drill bit designed for high-throughput drilling in production and machining environments. Built from high-speed steel with a bright/uncoated finish, this bit features a parabolic flute geometry and web-thinned point that improve chip evacuation and reduce thrust in softer materials. The 130-degree point angle and standard point type make it well suited for entry into aluminum and similar non-ferrous workpieces. At 0.082 inches (wire size no. 45) in diameter with a 1.5-inch overall length, it fits standard straight-cylindrical chuck systems. Licensed machinists and CNC setup techs are the primary installers of this tooling.

This drill bit is built to DIN 1897 specification for stub-length twist drills. The shortened flute length of 15/32 inches provides added rigidity compared to jobber-length bits, reducing deflection in tight-tolerance applications. Primary workpiece material is aluminum, though the high-performance HSS construction handles a range of non-ferrous and softer ferrous materials. With a maximum drilling depth of 0.350 inches and a 3xD flute-to-diameter ratio, it is optimized for shallow, precise holes in high-cycle production setups such as screw machine operations, CNC drilling, and fixture work.

Key Features

• Wire size no. 45 — 0.082-inch diameter with a tolerance of +0.000 to -0.014 mm for consistent hole sizing
• Parabolic flute with parallel web configuration promotes fast chip evacuation
• Web-thinned point reduces entry thrust and centering load on the workpiece
• 130-degree point angle optimized for aluminum and non-ferrous materials
• Stub length (DIN 1897) adds rigidity and minimizes deflection in close-tolerance drilling
• Bright/uncoated finish — no coating to flake or delaminate, suitable for re-sharpening

Compatibility

Designed as an OEM-style production drill conforming to DIN 1897 stub-length standards, compatible with any standard straight-cylindrical shank chuck or collet system accepting a 0.082-inch shank diameter.

Installation Notes

This tooling is installed by machinists, tool-and-die professionals, and CNC operators. Ensure the spindle is fully stopped and the machine is powered down or in a safe state before changing tooling. Secure the straight-cylindrical shank fully in the chuck or collet to the recommended grip depth to prevent pullout under load. Do not exceed the maximum drilling depth of 0.350 inches per pass without retracting to clear chips, particularly in blind-hole applications.