Guhring 9012420083000 Screw Machine Drill Bit 0.3268in

Product Description

The GUHRING 9012420083000 is a screw machine length drill bit engineered for high-precision drilling in metal fabrication and machining applications. Built from submicron solid carbide and coated with TiN (titanium nitride) for extended tool life, this bit features a 140-degree split point (SU-type) with web thinning for reduced thrust and cleaner entry. The straight-cylindrical shank provides secure chuck engagement, and the right-hand spiral flute geometry promotes efficient chip evacuation. At 0.3268 inches (8.30 mm) in diameter, it falls within the Series 1242 product family and conforms to DIN 6539 specifications. Machinists and toolroom technicians rely on this bit for consistent performance in demanding production environments.

This drill bit is designed for use on brass, cast iron, and steel workpieces across general machining, screw machine, and CNC drilling operations. Its shorter screw machine (stub) length provides increased rigidity compared to jobber-length bits, making it well suited for drilling operations where chatter control and positional accuracy are critical. The 3xD flute-to-diameter ratio supports chip clearance in moderate-depth hole applications.

Key Features

• Submicron solid carbide construction for rigidity and wear resistance
• TiN coating extends cutting edge life on ferrous and non-ferrous materials
• 140-degree SU split point with web thinning reduces entry thrust and walking
• Right-hand cut with regular spiral flute for efficient chip evacuation
• Straight-cylindrical shank fits standard drill chucks and collets
• Conforms to DIN 6539 specification for dimensional consistency
• Parallel web configuration maintains core strength throughout flute length

Compatibility

Designed as an OEM-style replacement or direct-use carbide drill bit for screw machine and CNC machining setups requiring a 0.3268 inch (8.30 mm) diameter straight-shank bit with DIN 6539 geometry. Compatible with standard drill chucks and ER collet systems accepting straight-cylindrical shanks in this diameter range.

Installation Notes

This bit is installed by qualified machinists or toolroom technicians in drill press, screw machine, or CNC machining center spindles. Always ensure the machine spindle is fully stopped and locked out before changing tooling. Secure the shank fully in the chuck or collet to the recommended engagement depth to prevent pullout under load. Inspect cutting edges for wear or chipping before each use, as carbide tools can fracture if run on a damaged edge.