Guhring 9006570018500 Cobalt Jobber Drill Bit No 49

Product Description

The GUHRING 9006570018500 is a cobalt jobber-length drill bit in No. 49 wire size (0.073 inch diameter), built for high-performance drilling in tough materials. The bit is coated with Titanium Nitride (TiN) to reduce friction and extend cutting life. It features a 130-degree split point that self-centers on entry and cuts aggressively without walking, reducing the need for a center punch. With an overall length of 1.811 inches and a flute length of 0.866 inches, this is a short, rigid geometry suited for precise hole placement. The straight shank accepts standard drill chucks. Series 657 from GUHRING conforms to DIN 338 standards and is manufactured to M35 cobalt grade.

This bit is designed for drilling stainless steel and high-temperature alloys, material categories where standard HSS tooling underperforms and wear rates are high. The TiN coating and cobalt substrate handle the work-hardening characteristics of austenitic stainless and nickel-based alloys. Typical applications include fabrication shops, aerospace maintenance, and mechanical contractors drilling into stainless fastener plates, brackets, or structural components. The tool application category is listed as centering, confirming its usefulness in precision hole-start operations. Maximum drilling depth is 0.866 inches per the flute length, with a manufacturer-listed maximum drilling depth of 2.625 inches.

Key Features

• M35 cobalt high-speed steel construction resists heat buildup when drilling stainless steel and high-temp alloys
• TiN (Titanium Nitride) coating reduces friction and extends tool life between sharpenings
• 130-degree split point self-centers on contact and minimizes thrust force required
• Web-thinned, tapered web configuration improves chip evacuation and reduces cutting torque
• Right-hand, regular spiral flute geometry per DIN 338 specification
• Straight cylindrical shank at 0.073 inch diameter fits standard keyless and keyed drill chucks

Compatibility

Designed as a DIN 338-compliant jobber drill bit compatible with standard straight-shank drill chucks and spindles accepting wire-size tooling in the No. 49 range (0.073 inch diameter). Suitable for use in benchtop drill presses, CNC machining centers, and handheld drills configured for stainless steel or high-temperature alloy work.

Installation Notes

This drill bit is installed by machinists, tool-and-die workers, and mechanical trade professionals. Secure the straight shank firmly in the chuck before use and verify runout is within acceptable limits for the application. When drilling stainless steel or high-temp alloys, use appropriate cutting fluid or coolant to manage heat — dry drilling accelerates TiN coating wear and can work-harden the workpiece surface. Allow the bit to cut at consistent feed pressure; backing off pressure mid-hole can cause rubbing and premature dulling.