Guhring 9003050048000 Cobalt Jobber Drill No 12 0.189in

Product Description

The GUHRING 9003050048000 is a cobalt jobber-length drill bit in No. 12 wire size (0.1890 inches diameter), built to DIN 338 standards for general-purpose drilling in steel and cast iron. The 118-degree standard point angle and web-thinned tip reduce entry force and help center the bit without a pilot hole. A steam oxide coating provides corrosion resistance and mild lubricity during cutting. The two-flute regular spiral design evacuates chips efficiently through a 2.0472-inch flute length, with an overall length of 3.3858 inches. Machinists, maintenance technicians, and fabrication shops reach for this drill when working through ferrous metals in production or repair applications.

This bit suits general-purpose metal drilling in both shop and field environments. Primary target materials are steel and cast iron, making it a fit for structural fabrication, machine maintenance, and light manufacturing. The straight cylindrical shank seats directly in standard drill chucks and collet-style holders without adapters. Maximum drilling depth is 1.7640 inches, which covers the majority of through-hole and blind-hole tasks encountered in everyday metalwork. It ships individually and is available in multiples for toolcrib stocking.

Key Features

• Cobalt construction with steam oxide coating for durability in ferrous metal drilling
• 118-degree standard point angle with web-thinned, tapered web for reduced entry force
• DIN 338 specification, Series 305 — consistent geometry for predictable performance
• Regular spiral, right-hand cut with 2-flute design for efficient chip evacuation
• Straight cylindrical shank (0.1890 inches) fits standard drill chucks without adapters
• Maximum drilling depth of 1.7640 inches suits most through-hole and blind-hole applications

Compatibility

Designed as a DIN 338 general-purpose jobber drill for use in drill presses, hand drills, and machining centers that accept straight-shank tooling at 0.1890-inch shank diameter. Primary workpiece materials are steel and cast iron.

Installation Notes

Install in a properly sized drill chuck or collet and verify the shank is fully seated and secured before use. Secure the workpiece firmly to prevent rotation during drilling. Apply cutting fluid or light oil when drilling steel to manage heat buildup and extend tool life. Inspect the cutting edges before each use and replace the bit if chipping or excessive wear is observed.