Guhring 9003290044500 Cobalt Stub Drill Bit 0.1752 in

Product Description

The GUHRING 9003290044500 is a cobalt (M35 grade) screw machine length drill bit designed for high-performance drilling in demanding materials. Built to DIN 1897 standards, this stub-length bit measures 0.1752 inches (4.45 mm) in diameter with an overall length of 2.2835 inches (58.00 mm). The 130-degree split point geometry and web-thinned, tapered web construction reduce thrust and improve centering without a center punch. Spiral flute design with oxide tip coating promotes chip evacuation and extends tool life in difficult-to-machine workpieces. Licensed HVAC, plumbing, and mechanical trades rely on cobalt-grade bits for cutting through hard alloys without sacrificing dimensional accuracy.

This drill bit is rated for primary use in titanium alloy workpieces, making it a practical choice for aerospace, industrial maintenance, and mechanical fabrication applications where standard HSS tooling fails prematurely. The straight-cylindrical shank seats securely in standard 3-jaw chucks and drill presses. With a flute-to-diameter ratio of 3xD and a maximum drilling depth of 0.9449 inches (24.00 mm), this bit is optimized for shallow, accurate holes in hard stock. The stub length reduces deflection compared to jobber-length bits, improving hole straightness in tight setups.

Key Features

• M35 cobalt construction for heat resistance and extended tool life in hard alloys
• 130-degree drill point angle with web thinning for reduced entry thrust and improved centering
• Oxide tip coating enhances lubricity and wear resistance at the cutting edge
• DIN 1897 stub-length profile minimizes deflection in close-clearance drilling setups
• Right-hand spiral flute design promotes efficient chip evacuation
• Diameter tolerance of +0.000 to -0.018 mm for consistent, accurate hole sizing

Compatibility

Designed as an OEM-style replacement stub drill bit conforming to DIN 1897 specifications, suitable for use in standard straight-shank drill chucks and compatible with drill presses, CNC machines, and handheld power drills accepting 4.45 mm (0.1752 inch) shank diameters.

Installation Notes

Installation of this drill bit should be performed by qualified machinists or trade professionals familiar with rotary cutting tool safety. Ensure the machine spindle is fully powered down and locked out before changing tooling. Seat the straight-cylindrical shank fully into the chuck and tighten securely to prevent slippage during operation. Do not exceed the recommended maximum drilling depth of 0.9449 inches per pass without retracting to clear chips.