Guhring 9012420064000 Screw Machine Drill Bit 0.252in

Product Description

The GUHRING 9012420064000 is a solid carbide screw machine length drill bit designed for high-performance drilling in demanding shop and field applications. Built to DIN 6539 standards, this bit features a 0.252-inch (6.40 mm) diameter, a 140-degree split point (SU type), and a web-thinned, parallel web configuration that reduces entry force and improves chip evacuation. The two-flute spiral design runs right-hand cut with a straight-cylindrical shank for secure chuck retention. At 70.00 mm overall length and a 3xD flute-to-diameter ratio, it is sized for compact, high-accuracy drilling where stub-length rigidity matters. Licensed machinists, tool and die technicians, and maintenance trades are the typical installers.

This bit is suited for drilling cast iron and steel in production machining, maintenance repair, and general metalworking environments. The screw machine length format makes it well matched to drill presses, CNC machining centers, and manual lathes where short, rigid tooling is preferred. The coated submicron solid carbide construction handles interrupted cuts and hard ferrous materials that would quickly wear high-speed steel alternatives. Maximum drilling depth is 0.843 inches (21.40 mm).

Key Features

• Solid carbide construction with submicron grain for wear resistance in cast iron and steel
• 140-degree SU split point with web thinning for reduced thrust and self-centering entry
• Screw machine (stub) length for maximum rigidity and reduced deflection
• Right-hand cut, two-flute spiral design promotes efficient chip clearing
• Straight-cylindrical shank fits standard drill chucks and collet systems
• Meets DIN 6539 specification for consistent dimensional tolerances

Compatibility

Designed as an OEM-style replacement or direct-use solid carbide drill bit for applications requiring a 0.252-inch diameter, DIN 6539 screw machine length tool in cast iron or steel workpieces.

Installation Notes

Installation and use should be performed by qualified machinists or maintenance technicians familiar with cutting tool setup and safe machine operation. Secure the shank fully in the chuck or collet before operation and verify spindle runout is within acceptable limits for carbide tooling. Solid carbide bits are brittle compared to high-speed steel — avoid side loading, interrupted cuts at high feed rates without proper support, and dropping or impact contact with hard surfaces. Follow machine manufacturer guidelines and applicable shop safety codes when setting speeds and feeds for carbide tooling.