Guhring 9006590150000 Cobalt Stub Drill Bit 15mm

Product Description

The GUHRING 9006590150000 is a cobalt stub-length (screw machine length) drill bit designed for high-performance drilling in demanding materials. Built to DIN 1897 standards, it features a 15 mm (0.5906 inches) diameter, a 130-degree split point, and a parabolic flute geometry that evacuates chips efficiently and reduces heat buildup. Web thinning lowers entry thrust, making it well-suited for tough, work-hardening alloys. The straight-cylindrical shank fits standard drill chucks without modification. This is a heavy-duty grade tool intended for use by machining professionals, maintenance technicians, and toolroom operators working with precision tolerances.

This drill bit is rated for primary use in titanium alloy workpieces and other hard or abrasive metals where standard HSS tooling fails prematurely. The stub-length body provides added rigidity compared to jobber-length bits, reducing deflection in short-reach applications such as CNC machining centers, manual drill presses, and screw machine setups. The 3xD flute-to-diameter ratio and 130-degree point angle are optimized for controlled penetration in structural and aerospace-grade materials. Overall length is 4.37 inches with a flute length of 2.2047 inches and a maximum drilling depth of 1.319 inches.

Key Features

• 15 mm (0.5906 inches) diameter with a tight tolerance of +0.000 to -0.027 mm for precise hole sizing
• 130-degree standard point angle with web thinning for reduced entry thrust in hard alloys
• Parabolic flute geometry promotes fast chip evacuation and reduced heat accumulation
• Cobalt tool material provides superior heat and wear resistance over standard HSS
• DIN 1897 stub-length specification delivers increased rigidity and reduced deflection
• Straight-cylindrical shank compatible with standard drill chucks and collet holders

Compatibility

Designed as an OEM-specification replacement or direct-use stub drill conforming to DIN 1897. Suitable for use in CNC machining centers, manual drill presses, and screw machine applications where a straight-cylindrical shank stub drill in the 0.5000 to 0.6000 inch (13.50 to 17.00 mm) diameter range is specified.

Installation Notes

Installation and use should be performed by qualified machinists or toolroom technicians familiar with cutting tool setup and speeds-and-feeds selection for cobalt tooling. Secure the shank fully in the drill chuck or collet before operation and verify runout with a dial indicator when precision tolerances are critical. Do not exceed the recommended maximum drilling depth of 1.319 inches per pass without retracting to clear chips. Use appropriate cutting fluid or coolant for titanium alloy and other hard-material applications to maximize tool life.