Guhring 9006600007400 Micro Drill Bit No. 69 Cobalt Tin

Product Description

The GUHRING 9006600007400 is a cobalt micro drill bit designed for precision drilling in demanding materials. Built to DIN 1899 standards, it carries a No. 69 wire gauge size with a decimal diameter of 0.0292 inches. The bit features a 118-degree faceted point, a spiral flute, and a straight-cylindrical shank with a 1.00 mm shank diameter. A titanium nitride (TiN) coating reduces friction and extends tool life in production environments. Overall length is 0.984 inches, with a maximum drilling depth of 0.145 inches. This tool is intended for use by machinists, tool-and-die technicians, and precision manufacturing professionals.

This micro drill is primarily suited for drilling aluminum and non-ferrous materials, with a secondary rating for titanium alloys. The 5xD flute-by-diameter ratio supports chip evacuation in short, blind, or through-hole applications at this diameter range. The web-thinned, tapered web configuration reduces thrust load at entry, making it practical for tight-tolerance work in aerospace, medical device, and precision mechanical assemblies. Right-hand cut orientation is standard for conventional drill press and CNC spindle use. This is a Series 660 tool manufactured to DIN 1899 specification.

Key Features

• No. 69 wire size, 0.0292-inch decimal diameter with tolerance of +0.000 to -0.004 mm
• 118-degree faceted drill point for clean entry on aluminum and titanium alloy workpieces
• TiN coating reduces friction and improves tool life in production drilling applications
• Web-thinned tapered web lowers thrust force at the cutting edge
• Spiral flute geometry supports chip clearance in 5xD depth applications
• Manufactured to DIN 1899 specification, Series 660

Compatibility

Designed as a DIN 1899 Series 660 micro drill for use in standard straight-shank drill chucks and collet systems accepting a 1.00 mm shank. Primary workpiece material rating is aluminum (K, M, N, P material codes); secondary rating covers titanium alloys (S material code).

Installation Notes

Installation and use should be performed by qualified machinists or tooling technicians familiar with micro-diameter drill handling. Secure the straight-cylindrical shank in a precision collet or drill chuck rated for the shank diameter before operation. At micro diameters, runout in the spindle or chuck can cause immediate tool breakage — verify TIR before drilling. No coolant-through capability is present on this bit; external coolant or cutting fluid application is recommended when drilling titanium alloys.