Guhring 9038990013800 Micro Drill Bit 0.0543 in Carbide

Product Description

The GUHRING 9038990013800 is a solid carbide micro drill bit designed for precision drilling in demanding metalworking applications. Built to Series 3899 specifications, it features a 140-degree faceted point geometry and a TiAlN coating that extends tool life in abrasive and high-temperature cutting conditions. The right-hand spiral flute promotes efficient chip evacuation in tight bore diameters. At 0.0543 inches (1.38 mm) in diameter, this drill is suited for fine-tolerance work where dimensional accuracy is critical. The straight-cylindrical shank and h7 diameter tolerance make it compatible with standard precision collet systems used in CNC machining centers and manual drill presses.

This micro drill bit is intended for use in machining cast iron and steel workpieces. Its 5xD flute-to-diameter ratio supports drilling to a maximum depth of 0.312 inches (7.93 mm), making it appropriate for through-holes and shallow blind bores in ferrous materials. Typical applications include precision component manufacturing, toolroom work, mold and die operations, and aerospace or automotive part production where small-diameter holes must hold tight positional and size tolerances. It is sold individually and is a direct replacement unit within the Series 3899 product line.

Key Features

• Solid carbide construction with K40 material grade for rigidity and wear resistance in ferrous materials
• TiAlN coating reduces friction and heat buildup, extending tool life in steel and cast iron
• 140-degree faceted point with web thinning improves centering accuracy and reduces thrust force
• Right-hand regular spiral flute design promotes consistent chip evacuation in small-diameter bores
• Straight-cylindrical shank with h7 tolerance fits standard precision collet and chuck systems
• 5xD flute-to-diameter ratio supports maximum drilling depth of 0.312 inches (7.93 mm)

Compatibility

Designed as an OEM-style replacement micro drill bit within the GUHRING Series 3899 line. Rated for primary workpiece materials cast iron (material code K) and steel (material code P). Fits standard straight-bore precision collets and chucks accepting a 3.00 mm (approximately 0.118 inch) shank diameter.

Installation Notes

Installation and use of this tool should be performed by a qualified machinist or toolroom technician familiar with CNC or manual drilling operations. Secure the shank fully in a precision collet or drill chuck before operation, and verify runout is within acceptable limits for the bore tolerance required. Do not exceed the rated maximum drilling depth of 0.312 inches per pass without retracting to clear chips. Eye protection and appropriate machine guarding must be in place per applicable shop safety standards when operating any rotary cutting tool.