Guhring 9003050045000 Cobalt Jobber Drill Bit No.16

Product Description

The GUHRING 9003050045000 is a cobalt jobber length drill bit sized to wire gauge No. 16, equal to 0.1772 inches in diameter. Designed for general-purpose drilling, this bit features a 118-degree cone relief point and a spiral flute with regular helix for efficient chip evacuation. The web-thinned tip reduces thrust and improves penetration into harder workpiece materials. With an overall length of 80 millimeters and a flute length of 47 millimeters, it fits standard drill chucks without adapters. Licensed HVAC techs, plumbers, pipefitters, and general maintenance tradespeople keep cobalt bits like this on hand for drilling through steel and cast iron where standard HSS bits fall short.

This drill bit is suited for use on primary workpiece materials including steel and cast iron, covering ISO material codes P and K. The straight-cylindrical shank with a 4.5 millimeter diameter seats securely in keyless or keyed chucks. Built to DIN 338 standards and manufactured under GUHRING Series 305, it fits general-purpose production and field drilling applications where dimensional accuracy and tool life in ferrous materials are required. It is sold individually with a minimum order quantity of one.

Key Features

• Cobalt construction for improved heat resistance and tool life in steel and cast iron
• 118-degree cone relief point with web thinning for reduced entry thrust
• Spiral flute, regular helix for consistent chip removal in through-hole drilling
• Straight-cylindrical shank at 0.1772 inches fits standard chucks without adapters
• Built to DIN 338 specification with h8 diameter tolerance for precise hole sizing
• Maximum drilling depth of 1.585 inches (40.25 millimeters) at 5xD flute-to-diameter ratio

Compatibility

Designed as a general-purpose jobber length drill bit conforming to DIN 338, compatible with any standard drill chuck or press accepting a straight-cylindrical shank in the No. 16 wire gauge size class. Suitable for right-hand rotation drilling in steel and cast iron workpieces.

Installation Notes

Install and operate this bit with a standard drill press, hand drill, or CNC spindle set to right-hand rotation. Secure the shank fully in the chuck jaws before operation and verify runout before drilling to prevent premature wear. Use appropriate cutting fluid or oil when drilling ferrous materials to extend tool life. Wear ANSI-rated eye protection and ensure the workpiece is firmly clamped before drilling.