Guhring 9005520087300 Stub Drill Bit 11/32 in Hss

Product Description

The GUHRING 9005520087300 is a stub-length (screw machine length) twist drill bit designed for high-performance drilling in production and machine-shop environments. Built from high speed steel with a bright/uncoated finish, this bit features a parabolic flute geometry and a web-thinned parallel web configuration that improves chip evacuation and reduces thrust in shorter-depth holes. The 130-degree split point minimizes walking on entry without requiring a center punch. Overall length is 3-5/16 inches with a 1-9/16-inch flute length, and the straight-cylindrical shank seats directly in standard drill chucks and collet holders. The bit is manufactured to DIN 1897 specification and carries a high-performance grade designation from GUHRING.

This drill bit is sized at 11/32 inches (0.3438 inches decimal) and is optimized for drilling aluminum as its primary workpiece material, though the HSS construction also handles a range of softer ferrous and non-ferrous materials. The stub-length body provides greater rigidity than jobber-length bits, making it well suited for CNC machining centers, drill presses, and screw machine applications where deflection control and hole accuracy are priorities. The 3xD flute-to-diameter ratio supports drilling to a maximum depth of approximately 1.059 inches without a peck cycle.

Key Features

• 11/32 inches (0.3438 inches) diameter with a tight tolerance of +0.000 to -0.022 mm
• Parabolic flute geometry with web thinning for efficient chip evacuation and reduced feed force
• 130-degree standard point angle minimizes drill walk on entry
• Stub (screw machine) length body at 3-5/16 inches overall for added rigidity
• Bright/uncoated HSS construction suited for aluminum and general-purpose applications
• Manufactured to DIN 1897 specification, Series 552

Compatibility

Designed as a DIN 1897 stub-length drill bit with a straight-cylindrical shank, this bit fits standard drill chucks, ER collets, and other straight-shank toolholders commonly used in CNC machining centers, drill presses, and screw machines. Primary workpiece material compatibility is aluminum per manufacturer specification.

Installation Notes

Installation and operation should be performed by a qualified machinist or tooling technician. Secure the shank fully in the chuck or collet and verify runout before beginning a cut. Always power down and de-energize the machine spindle before changing tooling. Do not exceed the manufacturer-rated maximum drilling depth of 1.059 inches without adjusting the machining program to include chip-clearing passes.