Guhring 9006590011500 Screw Machine Drill Bit Cobalt

Product Description

The GUHRING 9006590011500 is a screw machine length (stub) drill bit engineered for demanding metal-cutting applications. It features a cobalt construction with a TiN (titanium nitride) coating, a 130-degree split point, and a parabolic fast-spiral flute geometry. The bit measures 0.0453 inches (1.15 mm) in diameter with an overall length of 1.1024 inches (28.00 mm). The shortened flute length and rigid body of screw machine length bits reduce deflection and improve hole accuracy in short-depth drilling operations. This bit is suited for machinists, tool and die professionals, and production drilling environments where precision and tool life are critical.

This drill bit is designed for use on hardened materials, nickel alloys, stainless steel, carbon and alloy steels, and titanium alloys. The parabolic fast-spiral flute design improves chip evacuation when drilling tough, stringy, or work-hardening materials. It is a strong fit for CNC machining centers, drill presses, and manual machine tool setups requiring consistent hole quality in difficult-to-machine workpiece materials. The straight cylindrical shank accepts standard drill chucks and collet holders compatible with the 0.0453-inch shank diameter.

Key Features

• Cobalt construction with TiN coating for extended tool life in hard and abrasive materials
• 130-degree cone relief point reduces thrust and improves self-centering on entry
• Parabolic fast-spiral flutes promote aggressive chip evacuation in stainless, nickel alloy, and titanium
• Web-thinned parallel web geometry reduces cutting force and heat buildup
• Screw machine (stub) length body minimizes deflection for tighter positional tolerances
• Conforms to DIN 1897 specification for dimensional consistency
• No coolant-through design — suitable for flooded external coolant or dry cutting setups

Compatibility

Designed as an OEM-style replacement or direct substitute for DIN 1897 Series 659 screw machine length drill bits in 1.15 mm diameter. Compatible with any drill chuck or collet system accepting a 0.0453-inch straight cylindrical shank.

Installation Notes

Installation and use should be performed by qualified machinists or tooling professionals familiar with cutting tool setup and machine operation. Secure the shank fully in a properly sized drill chuck or collet before operation and verify runout before beginning a cut. Do not exceed the recommended feed and speed parameters for the workpiece material. Inspect the cutting edge for wear or chipping before each use, as small-diameter cobalt bits are susceptible to breakage if run at incorrect parameters or in a worn state.