Guhring 9006600008500 Micro Drill Bit 0.0335 in Cobalt

Product Description

The GUHRING 9006600008500 is a cobalt micro drill bit designed for precision drilling in small-diameter applications where dimensional accuracy is critical. At 0.0335 inches in diameter with a 118-degree faceted point, it delivers clean entry geometry on hard and difficult-to-machine materials. A TiN coating reduces surface friction and extends tool life in repetitive drilling cycles. The overall length is 0.984 inches, with a 1.50 mm straight-cylindrical shank sized for standard collets and precision drill chucks. Web-thinning and a tapered web configuration reduce thrust load at the cutting edge, which matters when working at this scale. This bit is used by machinists, tool-and-die technicians, and precision fabricators.

The 9006600008500 is rated primarily for aluminum and non-ferrous materials, with secondary suitability for titanium alloys. The Series 660 geometry follows DIN 1899 specification, a standard for short micro drills used in fine-pitch hole applications. The 5xD flute-to-diameter ratio and regular spiral flute type support chip evacuation in shallow, small-bore holes. Maximum drilling depth is 0.159 inches (4.03 mm). This tool is appropriate for CNC machining centers, manual drill presses, and precision hand-held drilling fixtures where runout control is maintained.

Key Features

• Cobalt construction with TiN coating for extended tool life in hard and abrasive materials
• 118-degree faceted point with web-thinning for reduced thrust and cleaner entry
• DIN 1899 Series 660 specification for consistent micro-drill geometry
• Straight-cylindrical shank at 1.50 mm for compatibility with standard precision collets
• Right-hand spiral flute design promotes chip evacuation in small-bore holes
• Diameter tolerance of +0.000 to -0.004 mm for tight positional accuracy

Compatibility

Designed as a DIN 1899-compliant micro drill bit suitable for use in CNC machining centers and precision drilling setups that accept a 1.50 mm straight-cylindrical shank. Rated for aluminum (K, M, N, P material codes) and titanium alloy (S material code) workpieces.

Installation Notes

Installation and use should be performed by qualified machinists or tooling technicians. Secure the shank in a precision collet or drill chuck with verified runout within acceptable tolerances for micro-diameter tooling — excessive runout at this diameter will cause premature breakage. Confirm spindle speed and feed rate are appropriate for the workpiece material before engaging the cut. Do not force the drill; micro drills are brittle and will snap under lateral load or excessive feed pressure.