Guhring 9006580036600 Cobalt Jobber Drill Bit No.27

Product Description

The GUHRING 9006580036600 is a cobalt jobber-length drill bit in wire gauge size No.27 (0.1441 inches diameter), built to Series 658 and conforming to DIN 338. It carries a Titanium Nitride (TiN) coating over a high-performance cobalt substrate, giving it elevated heat resistance for sustained cutting in ferrous materials. The 130-degree split point with web thinning reduces entry force and improves centering without a pilot hole. The parabolic flute geometry clears chips aggressively across a 1-17/32-inch flute length, making it well-suited for interrupted cuts and deep-hole work in production environments. Overall length is 2-3/4 inches with a straight-cylindrical shank diameter of 0.1441 inches.

This bit is designed for drilling cast iron and steel in shop and field settings where dimensional accuracy and tool life matter. The 5xD flute-to-diameter ratio supports drilling depths up to 1.3190 inches (33.51 mm) in a single pass without pecking in most setups. Right-hand cut geometry makes it compatible with standard drill presses, CNC machining centers, and handheld corded drills running conventional rotation. Machinists, tool-and-die technicians, and maintenance mechanics are the typical users. It is sold individually.

Key Features

• Wire gauge No.27 diameter: 0.1441 inches, tolerance -0.018 to 0.000 mm for close-tolerance hole sizing
• Cobalt high-performance substrate with TiN coating for extended tool life in steel and cast iron
• 130-degree standard point with web thinning reduces thrust force and self-centers on entry
• Parabolic flute profile accelerates chip evacuation and reduces heat buildup in deep holes
• Tapered web configuration adds rigidity along the full flute length
• DIN 338 specification ensures dimensional interchangeability with standard jobber-length tooling

Compatibility

Designed as a DIN 338 jobber-length drill bit with a straight-cylindrical shank, this bit fits any standard drill chuck accepting a 0.1441-inch shank diameter. Primary workpiece materials are cast iron (material code K) and steel (material code P).

Installation Notes

A licensed machinist or qualified maintenance technician should verify spindle speed and feed rate against material hardness before use. Secure the workpiece fully before drilling to prevent movement during entry. Coolant-through capability is not available on this bit, so external flood or mist coolant is recommended when drilling steel at high cycle rates. Inspect the cutting edges for wear after extended use in hard or abrasive materials, as cobalt bits in TiN-coated form can mask edge degradation that would otherwise be visible.