Accupro A-6120023R Micro Drill Bit Wire 89 Solid Carbide

Product Description

The ACCUPRO A-6120023R is a solid carbide micro drill bit designed for precision drilling in tight-tolerance applications. It carries a wire gauge size of 89, which corresponds to a decimal diameter of 0.0091 inches. The bit features a 120-degree standard point angle and a spiral flute geometry with right-hand cut direction, promoting clean chip evacuation in small-diameter holes. The bright, uncoated finish suits applications where coating buildup at these tiny diameters would affect dimensional accuracy. With an overall length of 25 mm and a 1.00 mm straight-cylindrical shank, it fits standard collet chucks used in CNC machining centers, drill presses, and precision hand tools.

This micro drill bit is suited for precision machining of printed circuit boards, instrument components, medical device parts, and other small-format workpieces requiring sub-0.010-inch hole diameters. The miniature series designation reflects its application in high-precision drilling where standard jobber-length bits are too large. Machinists, tool-and-die makers, and PCB fabrication technicians are the primary users. The solid carbide construction handles hard materials and maintains edge integrity at high spindle speeds typical of micro-drilling operations.

Key Features

• Wire size 89 with a decimal diameter of 0.0091 inches for sub-millimeter hole production
• Solid carbide construction provides rigidity and edge retention in hard or abrasive materials
• 120-degree standard point angle reduces thrust force on entry
• Spiral flute with regular spiral type promotes chip evacuation in deep micro holes
• Bright, uncoated finish maintains true diameter at extremely small cutting geometries
• Straight-cylindrical shank at 1.00 mm diameter fits standard micro collet chucks

Compatibility

Designed as an OEM-style replacement and standard micro drill bit for use in CNC machining centers, micro drill presses, and precision drilling fixtures that accept a 1.00 mm straight-cylindrical shank.

Installation Notes

Installation and use of micro drill bits should be performed by qualified machinists or technicians familiar with high-speed micro-drilling procedures. Ensure the spindle and collet are clean and properly seated before chucking the bit, as runout at this diameter scale can cause immediate breakage. Power down and lock out the machine before changing the bit. Operate within the spindle speed range recommended for solid carbide at this diameter to avoid premature breakage or workpiece damage.