Guhring 9064000025500 Micro Drill Bit 2.55mm Solid Carbide

Product Description

The GUHRING 9064000025500 is a solid carbide micro drill bit designed for precision drilling in demanding metalworking applications. Built to Series 6400 standards, it features a 2.55 mm diameter, a 140-degree faceted point, and a TiAlN coating that extends tool life at elevated cutting temperatures. The spiral flute geometry and web-thinned, tapered web configuration promote clean chip evacuation and reduce entry thrust. The straight-cylindrical shank measures 4.00 mm in diameter, suiting standard collet and chuck tooling. This bit is sized for applications requiring tight tolerances, with a diameter tolerance of +0.002 to +0.012 mm.

This micro drill bit is suited for production and maintenance machining environments where small-diameter, high-accuracy holes are required. Primary workpiece materials include cast iron, stainless steel, and steel. Secondary applications cover aluminum and titanium alloy. The 4xD flute-to-diameter ratio and 12.20 mm maximum drilling depth make it appropriate for shallow, precision holes in components such as hydraulic manifolds, valve bodies, instrumentation housings, and structural fabrications. A licensed machinist or toolroom technician is the typical end user.

Key Features

• Solid carbide DK460UF grade construction for rigidity and wear resistance in hard materials
• TiAlN coating provides thermal protection and extended tool life in ferrous and stainless steel cutting
• 140-degree faceted point reduces walking and improves entry accuracy on hard substrates
• Web-thinned tapered web lowers thrust force and aids chip break at the drill tip
• Straight-cylindrical shank compatible with standard ER collets and drill chucks
• Diameter tolerance of +0.002 to +0.012 mm supports close-tolerance hole requirements

Compatibility

Designed as an OEM-style solid carbide micro drill for use in CNC machining centers, drill presses, and manual toolroom equipment accepting a 4.00 mm straight-cylindrical shank. Rated for primary use in cast iron, stainless steel, and steel, with secondary suitability for aluminum and titanium alloy workpieces.

Installation Notes

Installation and operation should be performed by a qualified machinist or toolroom technician familiar with small-diameter carbide tooling. Secure the shank fully in a balanced, runout-minimized collet or chuck before operation, as carbide micro drills are brittle and sensitive to side load and runout. This bit does not support coolant-through delivery; apply cutting fluid externally as required by workpiece material. Follow machine manufacturer feed and speed guidelines for carbide tooling at this diameter to prevent breakage.