Guhring 9006600004200 Micro Drill Bit 0.0165 in Cobalt

Product Description

The GUHRING 9006600004200 is a cobalt micro drill bit designed for precision drilling in small-diameter applications where standard tooling cannot perform reliably. Built to DIN 1899 specification, this bit features a 118-degree faceted point angle, a TiN (titanium nitride) coating for improved wear resistance, and a web-thinned, tapered web configuration that reduces thrust and aids chip evacuation. The spiral flute geometry supports consistent cutting performance at the 0.0165-inch diameter. With an overall length of 0.984 inches and a straight-cylindrical shank, this bit is intended for use in precision drill presses, CNC machining centers, and high-speed spindle fixtures operated by machinists and tool-and-die professionals.

This micro drill bit is rated for aluminum as its primary workpiece material (material code K, M, N, P) and titanium alloy as a secondary workpiece material (material code S). The 5xD flute-by-diameter ratio and a maximum drilling depth of 0.093 inches make it well-suited for shallow, tight-tolerance holes in precision components, electronics housings, aerospace parts, and medical device manufacturing. The Series 660 designation identifies this as part of a consistent product family with repeatable geometry across sizes.

Key Features

• 0.0165-inch diameter with a diameter tolerance of +0.000 to -0.004 mm for tight fitment
• Cobalt construction with TiN coating for extended tool life in demanding materials
• 118-degree faceted point angle with web thinning reduces entry thrust
• Straight-cylindrical shank compatible with standard collets and precision chucks
• Right-hand cut, regular spiral flute for efficient chip removal
• Conforms to DIN 1899 specification for consistent geometry and interchangeability

Compatibility

Designed as an OEM-style micro drill for use in precision machining applications requiring a 0.0165-inch diameter straight-shank bit with a 1.00 mm shank diameter; verify spindle collet size and runout tolerance before installation.

Installation Notes

Installation should be performed by a qualified machinist or CNC operator. Ensure the spindle is fully stopped and power is locked out before loading or changing the bit. Use a precision collet or drill chuck rated for the 1.00 mm shank diameter to minimize runout at this scale. At micro-drill diameters, even slight misalignment or excessive feed rate can cause immediate tool breakage.