Guhring 9003010005100 Micro Drill Bit Wire 76 Cobalt

Product Description

The GUHRING 9003010005100 is a cobalt micro drill bit designed for precision drilling in small-diameter applications. It carries a wire gauge size of 76, which corresponds to a decimal diameter of 0.0201 inches. The 118-degree faceted point angle and web-thinned, tapered web configuration reduce entry force and improve hole accuracy. With an overall length of 0.984 inches and a spiral flute, this bit is built for controlled chip evacuation in tight drilling envelopes. It is suited for use by machinists, tool and die technicians, and precision fabricators working with small-bore requirements in production or repair settings.

This micro drill bit is rated for primary use in aluminum and is also applicable to titanium alloy workpieces, making it relevant across aerospace, automotive, and precision manufacturing environments. The Series 301 designation follows DIN 1899 specification, a standard for short micro drills with straight-cylindrical shanks. The 1.00 mm shank diameter fits standard precision collets and micro drill chucks. With a flute-to-diameter ratio of 5xD and a maximum drilling depth of 0.104 inches, this bit handles shallow, precise bores in production quantities.

Key Features

• Wire size 76 with a decimal diameter of 0.0201 inches for micro-precision drilling
• 118-degree faceted point with web thinning for reduced thrust and clean entry
• Cobalt construction provides heat resistance and edge retention in hard or abrasive materials
• Bright/uncoated finish — compatible with a wide range of cutting fluids without coating interference
• Spiral flute with regular spiral type promotes efficient chip evacuation from shallow holes
• Conforms to DIN 1899 standard for consistent dimensional accuracy

Compatibility

Designed as a DIN 1899-compliant micro drill bit for use in precision collet chucks and micro drill holders accepting a 1.00 mm straight-cylindrical shank. Primary workpiece material rating is aluminum; secondary rating is titanium alloy.

Installation Notes

Installation and use of micro drill bits should be performed by qualified machinists or toolroom technicians familiar with CNC or manual precision drilling equipment. Ensure the spindle and collet are clean and true before seating the shank to prevent runout that could snap a bit of this diameter. Do not exceed the rated maximum drilling depth of 0.104 inches without retracting to clear chips. Use appropriate cutting fluid for the workpiece material and operate at manufacturer-recommended spindle speeds for the diameter and material class.