Guhring 9005150079400 5/16 Inch Stub Drill Bit

Product Description

The GUHRING 9005150079400 is a screw machine length (stub) drill bit designed for high-productivity metal drilling in industrial and trade applications. Built from powdered metal (PMASP60 grade) with a coated finish, it delivers consistent performance in ferrous materials. The bit features a 130-degree drill point angle and a parabolic flute geometry for improved chip evacuation and reduced thrust in short-hole drilling operations. With a straight-cylindrical shank and web-thinned point, it mounts easily in standard drill chucks and CNC holders. This bit is used by machinists, tool-and-die technicians, and maintenance professionals who need a rigid, accurate stub-length drill for production work.

This drill bit is suited for drilling cast iron and steel in screw machine, turret lathe, and general machining center applications where a shorter flute length provides increased rigidity and reduced deflection. The stub (screw machine) length format makes it especially practical in tight-clearance setups or gang-drilling fixtures. The parabolic flute profile supports efficient chip removal in through-hole and shallow blind-hole applications up to the rated maximum drilling depth. It conforms to DIN 1897 specifications, making it a direct fit for metric-standard tooling programs as well.

Key Features

• Powdered metal (PMASP60) construction with coated finish for extended tool life in steel and cast iron
• 130-degree drill point angle reduces thrust and improves self-centering on flat and curved surfaces
• Parabolic flute design promotes fast, clean chip evacuation in short-hole drilling
• Web-thinned, parallel-web construction lowers cutting resistance and heat buildup
• Straight-cylindrical shank compatible with standard drill chucks and collet holders
• Conforms to DIN 1897 specification for consistent dimensional accuracy

Compatibility

Designed as an OEM-specification stub-length drill bit per DIN 1897 for use in straight-shank drill chucks, collet holders, and CNC turret stations where a 5/16 inch diameter stub drill is required. Primary workpiece materials are cast iron and steel.

Installation Notes

Installation and use should be performed by a qualified machinist or tooling technician. Secure the shank fully in a properly sized collet or drill chuck before operation and verify runout before beginning a production run. Power down and de-energize the machine spindle completely before changing or inspecting the bit. Do not exceed the maximum drilling depth of 0.9880 inches per pass without retracting to clear chips.