Guhring 9003010002300 Micro Drill Bit Wire 89 Cobalt

Product Description

The GUHRING 9003010002300 is a cobalt micro drill bit engineered for precision drilling in tight-tolerance applications. It carries a wire gauge size of 89, equivalent to 0.0091 inches in decimal, and features a 118-degree faceted point with web thinning for accurate hole entry and reduced thrust force. The overall length is 0.984 inches, with a straight-cylindrical shank measuring 1.00 mm in diameter. Built to DIN 1899 specification, this bit uses a spiral flute in a right-hand cutting direction. The bright, uncoated cobalt construction provides heat resistance and edge retention when drilling hard or abrasive materials without coolant-through capability.

This micro drill bit is intended for use in ferrous and non-ferrous materials, with aluminum listed as the primary workpiece material and titanium alloy as a secondary application. The 5xD flute-to-diameter ratio and tapered web configuration make it well suited for small-diameter, shallow holes in precision machining, instrument assembly, and general metalworking environments. Maximum drilling depth reaches 0.046 inches (1.16 mm). It fits standard drill chucks and collets accepting a 1.00 mm straight shank and is commonly used by machinists and toolroom technicians working with CNC machines, drill presses, or precision hand equipment.

Key Features

• Wire size 89 (0.0091 inches decimal) for micro-diameter drilling
• 118-degree faceted point with web thinning reduces entry thrust and improves centering
• Cobalt construction resists heat and wear in aluminum and titanium alloy work
• Spiral flute, right-hand cut with tapered web configuration
• Bright uncoated finish maintains dimensional accuracy in tight-tolerance bores
• Conforms to DIN 1899 specification for consistent quality and interchangeability

Compatibility

Designed as an OEM-style replacement or direct substitute for Series 301 micro drill bits conforming to DIN 1899, suitable for standard 1.00 mm straight-shank collets and chucks used in precision CNC and manual drilling applications.

Installation Notes

This bit is installed by a machinist or toolroom technician into a compatible collet or drill chuck that accepts a 1.00 mm straight-cylindrical shank. Verify chuck runout before use, as excessive runout at this diameter will cause premature breakage. Secure all workpieces firmly before drilling at micro diameters, and use manufacturer-recommended feed and speed rates for the specific workpiece material. No coolant-through capability is present, so external lubrication or misting is advised when drilling titanium alloys.