Guhring 9005520112000 Screw Machine Drill Bit 0.4409in Hss

Product Description

The GUHRING 9005520112000 is a stub-length, high speed steel drill bit designed for high-performance drilling in aluminum and similar non-ferrous materials. Built to DIN 1897 standards, this Series 552 bit features a parabolic flute geometry and a web-thinned point that reduces thrust load and improves chip evacuation at the cutting edge. The 130-degree point angle suits the bit for fast, accurate entry into aluminum workpieces with minimal walking. Overall length is 3.74 inches with a flute length of 1.85 inches, keeping the tool rigid in short-reach applications. Right-hand cut, straight-cylindrical shank, and a bright uncoated finish round out the specification.

This drill bit is suited for screw machine, CNC, and manual drill press applications where a stub or screw-machine length tool provides the rigidity needed for accurate hole location. Typical use cases include production drilling of aluminum plate, block, and extrusion in both job-shop and high-volume machining environments. The parabolic flute profile handles chip clearing in deeper passes up to a maximum drilling depth of 1.189 inches. Machinists and toolroom technicians working to DIN specifications will find this bit a direct-fit for DIN 1897 tooling programs.

Key Features

• Stub screw-machine length provides increased rigidity compared to jobber-length drills
• Parabolic flute geometry promotes efficient chip evacuation in aluminum
• 130-degree point angle optimized for aluminum and non-ferrous materials
• Web-thinned, parallel web configuration reduces drilling thrust and entry force
• Bright uncoated high speed steel construction — no coating delamination risk on aluminum
• Meets DIN 1897 standard; diameter tolerance held to +0.000 to -0.027 mm

Compatibility

Designed as an OEM-style replacement or direct-use tooling for any machine spindle accepting a straight-cylindrical shank in the 0.4409-inch (11.20 mm) diameter range, conforming to DIN 1897 stub drill specifications. Primary workpiece material is aluminum per manufacturer specification.

Installation Notes

Installation and use should be performed by a qualified machinist or toolroom technician familiar with drill press, CNC, or screw machine operation. Secure the straight-cylindrical shank firmly in a collet or drill chuck rated for the shank diameter before operation. Verify spindle speed and feed rate are appropriate for the workpiece material and drill diameter before beginning the cut. Do not exceed the maximum drilling depth of 1.189 inches per pass without retracting to clear chips.