Guhring 9006590047600 Cobalt Stub Drill Bit 3/16 in

Product Description

The GUHRING 9006590047600 is a cobalt screw machine length (stub) drill bit built for heavy-duty drilling in difficult materials. Measuring 0.1875 inches (3/16 inches) in diameter with an overall length of 2.44 inches, this Series 659 bit features a 130-degree split point and a parabolic flute geometry that clears chips aggressively in deep holes. The web-thinned point reduces entry force and improves centering on hard alloys. Right-hand cut with a straight-cylindrical shank. Manufactured to DIN 1897 standards. Intended for installation by machinists, tool-and-die technicians, and maintenance professionals working with high-strength materials.

This stub-length bit is suited for applications requiring maximum rigidity in short-reach setups. The cobalt construction is appropriate for drilling titanium alloys, stainless steels, and other high-hardness workpiece materials where standard HSS bits fail prematurely. The parabolic flute design supports efficient chip evacuation during interrupted cuts and blind-hole work. Maximum drilling depth is 0.743 inches. Shank length is 1.42 inches. The shorter stub geometry minimizes deflection, making it a practical choice for CNC machining centers, drill presses, and hand-held pneumatic drills where bit rigidity matters.

Key Features

• Cobalt construction rated for heavy-duty drilling in titanium alloys and hard metals
• 130-degree split point reduces thrust force and improves self-centering
• Parabolic flute design accelerates chip removal in deep or interrupted cuts
• Web-thinned parallel web for reduced cutting resistance at entry
• Stub length per DIN 1897 maximizes rigidity and minimizes runout
• Right-hand cut with straight-cylindrical shank for standard chuck compatibility

Compatibility

Designed as an OEM-style replacement or direct-fit stub drill for applications conforming to DIN 1897 specifications in the 0.1500 to 0.2000 inch diameter range. No coolant-through capability; suitable for dry or external-coolant drilling setups.

Installation Notes

Installation should be performed by qualified machinists or maintenance technicians familiar with drill press or CNC tooling procedures. Secure the straight shank fully in a Jacobs-style or collet chuck before operation and verify runout with a dial indicator on precision setups. Do not exceed the rated maximum drilling depth of 0.743 inches per pass without retracting to clear chips. Inspect the cutting edges for wear when transitioning between workpiece materials or after extended runs in abrasive alloys.