Guhring 9006590048500 Cobalt Stub Drill Bit 0.191 in

Product Description

The GUHRING 9006590048500 is a cobalt screw machine length drill bit designed for high-performance drilling in demanding materials. Built to DIN 1897 standards, this stub-length bit measures 0.191 inches (wire size #11) in diameter with an overall length of 2.44 inches. The parabolic flute geometry promotes efficient chip evacuation, and the 130-degree split point with web thinning reduces thrust and walking at entry. The straight-cylindrical shank provides a secure, concentric grip in standard drill chucks and collets. This is a professional-grade tool intended for use by machinists and maintenance technicians working in production or repair environments.

This drill bit is rated for primary use in titanium alloy workpieces, where cobalt construction and parabolic flute geometry are essential for managing heat buildup and extending tool life. Its stub-length format keeps deflection low in tight clearance applications and short-reach setups common in screw machine operations and fixture work. The maximum drilling depth is 0.737 inches, making it well suited for through-holes and shallow blind holes in metal plate and structural components. The 3xD flute-to-diameter ratio supports effective chip clearance in short-cycle production drilling.

Key Features

• Cobalt construction rated for heavy-duty drilling in titanium alloys and other hard metals
• Parabolic flute design improves chip flow and reduces heat accumulation at depth
• 130-degree point angle with web thinning lowers entry thrust and improves point stability
• Stub-length format minimizes deflection in confined or short-reach drilling setups
• Straight-cylindrical shank fits standard drill chucks and collet holders without modification
• Manufactured to DIN 1897 specification for consistent dimensional tolerancing

Compatibility

Designed as a DIN 1897 stub-length replacement or production drill bit for use in screw machine operations, CNC drilling, and manual drill press applications requiring a 0.191-inch diameter cobalt bit with a straight-cylindrical shank.

Installation Notes

Installation and use of this bit should be performed by qualified machinists or tooling technicians familiar with metal cutting operations. Secure the shank fully in the chuck or collet before operation and verify runout before drilling into finish workpieces. Do not exceed the maximum drilling depth of 0.737 inches per pass without retracting to clear chips. Use appropriate cutting fluid or coolant when drilling titanium alloys to manage heat and extend tool life.