Guhring 9038990016800 Micro Drill Bit 1.68mm Carbide

Product Description

The GUHRING 9038990016800 is a solid carbide micro drill bit engineered for precision drilling in demanding industrial and machining applications. Built from K40-grade solid carbide with a TiAlN coating, this bit delivers extended tool life and heat resistance at high cutting speeds. It features a 140-degree faceted point angle and a web-thinned geometry that reduces entry force and improves chip evacuation. With a 1.68 mm diameter and a 38 mm overall length, this tool is sized for tight-tolerance bores where accuracy and repeatability are critical. It is a right-hand cut tool intended for use in CNC machining centers, drill presses, and precision manual setups.

This micro drill bit is designed for drilling cast iron and steel workpieces in production and toolroom environments. The spiral flute with a 5xD flute-to-diameter ratio and a 12 mm flute length supports chip clearance in depths up to 9.48 mm. The straight-cylindrical shank at 3.00 mm diameter seats directly into standard collets and chucks. It suits applications in aerospace, automotive, die-and-mold, and general precision machining where small-diameter, close-tolerance holes are required.

Key Features

• K40-grade solid carbide substrate for rigidity and wear resistance in ferrous materials
• TiAlN coating provides oxidation resistance and extends cutting life at elevated temperatures
• 140-degree faceted point minimizes walking and reduces thrust force on entry
• Web-thinned geometry improves chip flow and reduces heat buildup at the cutting tip
• Straight-cylindrical shank with h7 diameter tolerance for precise collet and chuck fitment
• 5xD flute ratio supports drilling depths up to 9.48 mm without parabolic flute requirements

Compatibility

Designed as an OEM-specification micro drill bit within the GUHRING Series 3899, suited for CNC and manual drilling operations in cast iron and steel workpieces where a 1.68 mm bore diameter is required.

Installation Notes

Installation and use should be performed by a qualified machinist or toolroom technician. Secure the shank fully in a precision collet or drill chuck rated for the shank diameter before operating. Verify spindle runout is within acceptable tolerance for micro-diameter tooling, as excess runout accelerates tool breakage at this diameter. Follow machine manufacturer guidelines for feed rate and spindle speed when working with solid carbide micro tools.