Guhring 9012420030000 Screw Machine Drill Bit 3mm

Product Description

The GUHRING 9012420030000 is a solid carbide screw machine length drill bit designed for high-performance drilling in cast iron and steel. At 3.00 mm (0.1181 inches) in diameter with a 140-degree split point and web-thinned geometry, it delivers accurate, low-thrust entry without a pilot hole. The straight-cylindrical shank seats securely in standard drill chucks and collet holders. With a regular spiral flute and 2-flute configuration, it clears chips efficiently in short-depth applications. This bit is built to DIN 6539 standards and manufactured from submicron-grade solid carbide, making it a reliable choice for CNC machining centers and manual drill presses in production shop environments.

This drill bit is suited for drilling cast iron and steel workpieces in screw machine, production, and general machining applications. The screw machine length (stub) format provides rigidity in tight setups where a jobber-length bit would flex or chatter. With a maximum drilling depth of 0.453 inches (11.50 mm) and a flute-to-diameter ratio of 3xD, it is best applied in shallow-to-moderate depth holes where precision and hole quality matter. Licensed machinists, toolroom technicians, and production floor operators are the primary users of this tool.

Key Features

• Solid submicron-grade carbide construction for hardness and wear resistance in ferrous materials
• 140-degree SU split point with web thinning reduces entry thrust and improves centering accuracy
• DIN 6539 standard geometry ensures dimensional consistency and cross-brand holder compatibility
• Straight-cylindrical shank fits standard drill chucks and ER collet systems
• Regular spiral flute with parallel web provides stable chip evacuation in cast iron and steel
• Coated finish extends tool life in abrasive cutting conditions

Compatibility

Designed as an OEM-style replacement or direct tooling selection for screw machine and production drilling applications requiring a 3.00 mm solid carbide stub drill conforming to DIN 6539. Compatible with standard straight-shank drill chucks and ER collet holders accepting 3.00 mm shank diameters.

Installation Notes

Installation and tool changes should be performed with the machine in a full stop and locked-out state per applicable lockout/tagout procedures. Seat the straight shank fully into the collet or chuck and verify runout before beginning a cut. Avoid side loading this bit, as carbide is brittle and susceptible to chipping under lateral force. Consult your machine tool manufacturer and applicable OSHA or shop safety standards for proper speeds, feeds, and coolant setup prior to use.