Guhring 9038990014500 Micro Drill Bit 1.45mm Carbide

Product Description

The GUHRING 9038990014500 is a solid carbide micro drill bit designed for precision drilling in tight-tolerance applications. Built from K40-grade carbide and coated with TiAlN for heat and wear resistance, this bit handles demanding materials including cast iron and steel. It features a 140-degree faceted point angle with web-thinning geometry for improved centering and reduced thrust at entry. Overall length is 38 mm (approximately 1.50 inches), with a 3 mm (approximately 0.12 inch) straight-cylindrical shank. This is a tool for machinists, toolroom technicians, and precision fabricators working with small-diameter hole requirements.

This micro drill bit is suited for small-hole drilling operations in cast iron and steel workpieces across production machining and toolroom environments. The 5xD flute-to-diameter ratio supports chip evacuation in moderate-depth bores, with a maximum drilling depth of 7.83 mm (approximately 0.31 inches). The straight-cylindrical shank fits standard collet chucks and drill chucks sized for 3 mm shanks. Series 3899 is GUHRING's purpose-built line for micro-diameter solid carbide drilling, and this 1.45 mm diameter variant carries an h7 diameter tolerance for consistent fit and repeatable hole sizing.

Key Features

• 1.45 mm (0.0571 inch) drill diameter with h7 tolerance for tight, repeatable sizing
• Solid carbide K40-grade construction for rigidity and wear resistance in hard materials
• TiAlN coating extends tool life in cast iron and steel applications
• 140-degree faceted point with web-thinning reduces walking and entry thrust
• Regular spiral flute with 10 mm flute length supports chip clearance in shallow-to-moderate bores
• Right-hand cut, straight-cylindrical 3 mm shank for compatibility with standard toolholding

Compatibility

Designed for use in cast iron and steel workpieces. Fits standard collet chucks and drill chucks accepting a 3 mm straight-cylindrical shank. Part of GUHRING Series 3899 micro carbide drill tooling.

Installation Notes

This tool should be installed by a qualified machinist or toolroom technician. Secure the shank fully in a collet or drill chuck rated for the 3 mm shank diameter before operation. Ensure the spindle is at a complete stop before changing or inspecting the bit. Micro-diameter carbide tools are brittle — avoid side loading, runout beyond manufacturer tolerance, and hand-tightening in worn toolholders that cannot maintain concentricity.