Guhring 9003010005700 Micro Drill Bit Size 74 Cobalt

Product Description

The GUHRING 9003010005700 is a cobalt micro drill bit sized at wire gauge 74 (0.0225 inches decimal), engineered for precision drilling in demanding production and maintenance applications. Built to DIN 1899 specifications, this bit features an overall length of 0.984 inches and a 118-degree faceted point with web thinning on a tapered web configuration. The straight-cylindrical shank measures 1.00 mm in diameter, and the spiral flute geometry is designed for efficient chip evacuation. Machinists, toolroom technicians, and precision fabricators working with tight-tolerance micro-hole requirements will find this bit suited to production-level demands.

This micro drill is rated primarily for aluminum and non-ferrous materials (material codes K, M, N, P), with secondary suitability for titanium alloys (material code S). The 5xD flute-to-diameter ratio and maximum drilling depth of 0.120 inches (3.05 mm) make it appropriate for shallow micro-hole drilling in precision components, printed circuit board assemblies, thin-wall tubing, and similar fine-detail workpieces. The bright/uncoated finish is typical for cobalt tooling used where coating adhesion or contamination is a concern.

Key Features

• Wire gauge size 74 with 0.0225-inch decimal diameter and diameter tolerance of +0.000 to -0.004 mm
• 118-degree faceted point with web thinning for reduced entry force and accurate hole placement
• Cobalt construction provides elevated heat resistance versus standard high-speed steel
• Spiral flute with 5xD ratio supports chip clearing in shallow micro-drilling operations
• Bright/uncoated finish compatible with applications where coated tooling is not preferred
• Conforms to DIN 1899 specification for consistent dimensional standards

Compatibility

Designed as an OEM-specification micro drill bit per DIN 1899 Series 301, suitable for use with standard precision drill presses, CNC machining centers, and micro-drilling spindles that accept a 1.00 mm straight-cylindrical shank.

Installation Notes

Installation and use of micro drill bits should be performed by qualified machinists or toolroom personnel using equipment rated for the required spindle speeds at this diameter. Secure the straight-cylindrical shank firmly in a precision collet or chuck rated for the shank diameter before operation, and verify runout before drilling. At diameters this small, excessive feed pressure or improper spindle alignment significantly increases the risk of bit breakage. Follow applicable shop safety standards and machine manufacturer guidelines for micro-diameter tooling.