Guhring 9006590043700 Cobalt Stub Drill Bit 0.1719 in

Product Description

The GUHRING 9006590043700 is a cobalt screw machine length drill bit engineered for demanding metal cutting applications. Manufactured to DIN 1897 standards, this stub-length bit features a 0.1719 inch (11/64 inch) diameter, a 130-degree split point, and a parabolic flute geometry with web thinning for fast chip evacuation and reduced thrust. The straight-cylindrical shank mounts in standard drill chucks and quick-change holders. With a 2-flute parabolic design and a 3xD flute-to-diameter ratio, this bit handles high-performance drilling in difficult materials including titanium alloy. It is a heavy-duty grade tool suited for production environments and machine shop use.

This drill bit is designed for stub-length drilling operations where rigidity and hole accuracy matter in tight workpiece setups. Its primary rated workpiece material is titanium alloy, though cobalt construction also supports drilling in stainless steel, hardened steel, and other high-strength alloys. The web-thinned, parallel-web configuration reduces the force needed to start and advance the cut. With an overall length of approximately 2.28 inches and a flute length of approximately 0.94 inches, it fits short-reach setups common in screw machine, turret lathe, and CNC drilling operations.

Key Features

• Cobalt construction for heat resistance and extended tool life in hard metals
• 130-degree point angle for aggressive, self-centering entry on hard materials
• Parabolic flute with web thinning promotes efficient chip evacuation and reduced thrust
• DIN 1897 stub-length standard for maximum rigidity in short-reach drilling
• Right-hand cut with straight-cylindrical shank for universal chuck compatibility
• Diameter tolerance of +0.000 to -0.018 mm for controlled hole sizing

Compatibility

Designed as a DIN 1897 Series 659 stub-length drill bit for use in standard drill chucks, screw machines, turret lathes, and CNC machining centers that accept straight-cylindrical shanks. Rated for titanium alloy and suitable for other high-strength metal applications consistent with cobalt tooling.

Installation Notes

Installation and use of this drill bit should be performed by qualified machinists or tooling technicians familiar with metal cutting operations. Secure the straight shank fully and concentrically in the chuck before operation to avoid runout. Set spindle speed and feed rate according to the workpiece material and machine specifications before starting the cut. Coolant-through is not supported on this bit; apply external cutting fluid at the point of contact when drilling titanium or other heat-sensitive alloys.