Guhring 9003010007200 Micro Drill Bit 0.0283 in Cobalt

Product Description

The GUHRING 9003010007200 is a cobalt micro drill bit engineered for precision drilling in demanding materials at very small diameters. The bit measures 0.0283 inches in diameter with an overall length of 0.984 inches and a 118-degree faceted point angle. The web-thinned, tapered web design reduces thrust force at entry, which is critical at this scale. A spiral flute geometry promotes chip evacuation in shallow holes. The straight-cylindrical shank seats in standard collet or drill chuck systems. Diameter tolerance is held to +0.000 to -0.004 mm, ensuring consistent hole sizing in tight-tolerance applications. This bit is intended for use by machinists, toolroom technicians, and precision fabricators working with micro-hole requirements.

This micro drill bit is rated for primary use in aluminum and non-ferrous materials (material code K, M, N, P) and is also suited for titanium alloy and other difficult-to-machine materials (material code S). The 5xD flute-to-diameter ratio and maximum drilling depth of 0.146 inches make it appropriate for shallow, precision micro-holes in production and toolroom environments. The DIN 1899 specification governs geometry and dimensional standards for this series. Series 301 designates the GUHRING product family for this class of micro drill.

Key Features

• 0.0283-inch diameter cobalt construction for high-heat resistance in tough materials
• 118-degree faceted point with web thinning reduces entry thrust and improves centering
• Tapered web and spiral flute promote chip clearance in micro-depth holes
• Diameter tolerance of +0.000 to -0.004 mm for repeatable, close-tolerance hole sizing
• Right-hand cut with straight-cylindrical shank for standard collet and chuck compatibility
• Conforms to DIN 1899 geometry specification

Compatibility

Designed as an OEM-style micro drill bit for use in standard straight-shank collets and drill chucks capable of accepting a 1.00 mm shank diameter. Suited for machining aluminum, non-ferrous metals, and titanium alloy workpieces where micro-hole drilling is required.

Installation Notes

Installation and use should be performed by qualified machinists or toolroom personnel familiar with micro-diameter tooling. Secure the straight-cylindrical shank firmly in a precision collet or drill chuck rated for the shank diameter before operation. At this diameter, excessive feed rate or runout will cause breakage — verify spindle runout is within acceptable limits before use. Coolant-through is not supported on this bit; use external mist or flood coolant where the workpiece material requires it.