Guhring 9006590025500 Cobalt Stub Drill Bit 0.1004 in

Product Description

The GUHRING 9006590025500 is a cobalt stub-length (screw machine length) drill bit built for heavy-duty drilling in difficult materials. Manufactured to DIN 1897 standards with an M35 cobalt steel grade, this bit carries a 130-degree point angle with cone relief geometry and web thinning for reduced thrust and improved chip flow. The 2-flute regular spiral design paired with a straight-cylindrical shank suits standard drill chucks without adapters. The h8 diameter tolerance ensures consistent, close-tolerance hole sizing across production runs. This bit is appropriate for machinists, tool-and-die technicians, and precision fabricators working in production or job-shop environments.

Rated for primary use in titanium alloy workpieces, this bit is suited for aerospace, medical device, and precision manufacturing applications where work hardening and heat generation are primary concerns. The cobalt construction resists heat buildup during extended cutting cycles. The stub-length body provides added rigidity compared to jobber-length bits, making it the preferred choice in short-reach setups, CNC drill presses, and gang-drilling fixtures. The 3xD flute-to-diameter ratio supports chip evacuation in shallow to moderate depth holes up to 0.401 inches (10.18 mm).

Key Features

• M35 cobalt tool material rated for titanium alloy and other hard-to-machine metals
• 130-degree cone relief point with web thinning reduces entry thrust and improves centering
• DIN 1897 stub-length body provides rigidity and minimizes deflection in tight setups
• h8 diameter tolerance for close-tolerance, repeatable hole sizing
• Straight-cylindrical shank compatible with standard drill chucks and collets sized for 2.55 mm
• No coolant-through requirement; suitable for flood, mist, or dry cutting depending on application

Compatibility

Designed as a DIN 1897 Series 659 stub-length drill bit; fits any standard drill chuck or collet accepting a 2.55 mm straight-cylindrical shank. Intended for use in titanium alloy as the primary workpiece material, and generally appropriate for other high-strength, work-hardening alloys in production drilling applications.

Installation Notes

Installation and use should be performed by qualified machinists or tooling technicians familiar with drill press, CNC, or hand-drill setups for tight-tolerance work. Secure the shank fully in the chuck or collet and verify runout before engaging the workpiece. Ensure the machine spindle is fully stopped before changing or inspecting the bit. Follow applicable shop safety standards and tooling manufacturer guidelines for speeds and feeds when cutting titanium or similarly abrasive alloys.