Guhring 9005520021800 Screw Machine Drill Bit 0.086 in

Product Description

The GUHRING 9005520021800 is a stub-length (screw machine length) twist drill bit designed for high-throughput drilling in production and machining environments. Built from high speed steel (HSS) with a bright uncoated finish, this Series 552 bit carries a 130-degree split point and a parabolic flute geometry that promotes fast chip evacuation and reduces thrust load. The wire size 44 diameter measures 0.086 inches. The overall length is 1-9/16 inches with a flute length of 0.500 inches. Web thinning is applied for easier penetration at the start of cut. This bit is suited for machinists, tool-and-die shops, and production drilling applications where consistent hole quality in small diameters is required.

The 9005520021800 is optimized for drilling aluminum as its primary workpiece material, though the HSS construction and parabolic flute design also perform in a range of non-ferrous and ferrous materials at appropriate feeds and speeds. The stub-length body limits deflection and improves rigidity in short-reach applications such as screw machine work, CNC drill press operations, and fixture-mounted drilling. The straight cylindrical shank fits standard drill chucks and collet systems without modification. Maximum drilling depth is 0.383 inches, keeping this bit well-matched to shallow-hole production cycles.

Key Features

• Wire size 44 diameter: 0.086 inches with a tolerance of +0.000 to -0.014 mm for consistent hole sizing
• 130-degree standard point angle reduces walking and improves center accuracy on entry
• Parabolic flute profile accelerates chip removal and reduces heat buildup in continuous drilling
• Web-thinned parallel web lowers thrust force and extends tool life in production runs
• Stub-length body (1-9/16 inches overall) maximizes rigidity and minimizes deflection
• Meets DIN 1897 specification for stub-length drill geometry and dimensional standards

Compatibility

Designed as a DIN 1897 stub-length replacement drill bit suitable for standard drill chucks and collet holders accepting a straight cylindrical shank in the 0.086-inch diameter range. Primary workpiece material listed by the manufacturer is aluminum.

Installation Notes

Installation and use should be performed by a qualified machinist or tooling technician. Ensure the machine spindle is fully stopped and the chuck or collet is de-energized before inserting or removing the bit. Secure the straight cylindrical shank fully within the chuck or collet to the recommended gripping depth to prevent slippage during operation. Do not exceed the maximum drilling depth of 0.383 inches without retracting to clear chips, particularly when drilling aluminum or other materials prone to chip packing.