Guhring 9006590060400 Cobalt Stub Drill Bit 0.2378 in

Product Description

The GUHRING 9006590060400 is a stub-length, screw machine cobalt drill bit designed for high-performance drilling in demanding metalworking applications. Built to DIN 1897 standards, this Series 659 bit features a parabolic flute geometry and web-thinned point that work together to improve chip evacuation and reduce thrust load. The 130-degree split point improves self-centering on entry and minimizes walking on hard or slippery workpiece surfaces. At 0.2378 inches in diameter with an overall length of 2.7559 inches, this bit is sized for stub-length rigidity in close-clearance setups. It is installed and used by machinists and tool-room technicians on CNC drilling centers, drill presses, and manual machines.

This bit is rated for drilling titanium alloy as its primary workpiece material, making it appropriate for aerospace, medical, and precision machining applications where tool life and hole quality in difficult alloys are critical. The cobalt construction provides heat resistance needed for work-hardening materials. The parallel web configuration and 3xD flute-to-diameter ratio support consistent performance across short-depth holes. Maximum drilling depth is 0.864 inches. The straight-cylindrical shank at 0.2378 inches diameter seats cleanly in standard drill chucks and collet holders.

Key Features

• Cobalt tool material for heat resistance in titanium alloy and other hard metals
• Parabolic flute design with web thinning improves chip flow and reduces thrust
• 130-degree standard point angle with web-thinned geometry for positive self-centering
• Stub length (DIN 1897) provides added rigidity in short-reach drilling setups
• Straight-cylindrical shank compatible with standard chucks and collet systems
• Right-hand cut, 2-flute configuration for general-purpose hole-making in metalwork

Compatibility

Designed as a DIN 1897 stub-length replacement drill bit suitable for use in standard drill chucks and collet holders accepting a 0.2378-inch straight-cylindrical shank. Primary workpiece material rating is titanium alloy per manufacturer specification.

Installation Notes

Installation and use of this drill bit should be performed by qualified machinists or toolroom technicians familiar with cutting tool setup and machine operation. Ensure the machine spindle is fully stopped and locked out before mounting or removing the bit from its holder. Verify chuck or collet grip is within the shank diameter tolerance range before operation. Follow shop-standard speeds and feeds for cobalt tooling in titanium alloy to avoid work-hardening or premature tool wear.