Guhring 9006220031000 Jobber Drill Bit 3.1mm Cobalt

Product Description

The GUHRING 9006220031000 is a cobalt jobber-length drill bit designed for precision drilling in a range of materials including aluminum, non-ferrous metals, and plastics. Built to DIN 338 standards, this bit features a 130-degree split point with web thinning for reduced thrust and improved centering on entry. The parabolic flute geometry promotes efficient chip evacuation, making it well suited for deep-hole and high-cycle drilling operations. At 3.1 mm in diameter (0.1220 decimal inch) with a bright, uncoated finish, it delivers clean hole geometry without the added friction of a coating layer. Licensed machinists, tool-and-die shops, and industrial maintenance technicians are the primary users.

This drill bit is sized at 3.1 mm and fits applications where tight-tolerance holes in the 0.1000 to 0.1500 decimal inch range are required. The straight-cylindrical shank accepts standard drill chucks across benchtop drill presses, CNC machining centers, and handheld power tools. Primary workpiece materials include aluminum, non-ferrous alloys, and plastics as classified under material codes K, N, and P per DIN 338. The parabolic flute with a 5xD flute-to-diameter ratio supports a maximum drilling depth of 1.234 inches (31.35 mm), making it effective for through-holes and blind-hole work in production and maintenance environments.

Key Features

• Cobalt construction provides elevated heat resistance for high-speed and interrupted-cut drilling
• 130-degree drill point angle reduces thrust and improves self-centering on entry
• Parabolic flute profile with 5xD ratio promotes fast chip evacuation in deeper holes
• Web-thinned, tapered web configuration lowers cutting resistance and extends tool life
• Bright, uncoated finish maintains tight diameter tolerance of -0.018 to 0.000 mm
• DIN 338 specification ensures dimensional consistency and interchangeability with standard tooling

Compatibility

Designed as an OEM-style replacement or direct-fit tooling option for applications requiring DIN 338 jobber-length drill bits in the 3.00 to 4.00 mm diameter range. Compatible with any standard drill chuck accepting a 0.1220 inch straight-cylindrical shank.

Installation Notes

Installation and use should be performed by qualified machinists or maintenance technicians familiar with rotating cutting tools. Secure the shank fully in the chuck and verify runout before drilling. Always power down and lock out the spindle before changing tooling. Follow shop-specific speeds and feeds for the workpiece material; do not exceed the rated maximum drilling depth of 1.234 inches per pass without retracting to clear chips.