Accupro A-6120046R Micro Drill Bit No. 77 0.0181 in Carbide

Product Description

The ACCUPRO A-6120046R is a solid carbide micro drill bit sized at No. 77 (0.0181 inches decimal equivalent) with a 120-degree drill point angle. Designed for precision drilling in tight tolerances, this miniature-series bit features a bright/uncoated finish, a straight-cylindrical shank, and a right-hand cutting direction with a regular spiral flute. The overall length is 25.00 mm and the flute length is 2.00 mm. Its solid carbide construction delivers the rigidity needed when drilling small-diameter holes in metal, circuit board material, plastic, or similar substrates where dimensional accuracy is critical.

This bit is intended for production and job-shop environments where miniature hole sizes are required. Typical applications include PCB drilling, instrument manufacturing, watchmaking, mold work, and precision machining operations where wire-gauge drill sizes are standard. The No. 77 size and 1.00 mm shank diameter make it compatible with high-speed CNC spindles, drill presses, and precision hand-held units equipped with appropriate collets or chucks. It is sold individually (Pkg Qty: 1) with a minimum order quantity of 10 units.

Key Features

• Solid carbide construction for rigidity and wear resistance in small-diameter drilling
• No. 77 wire gauge size — 0.0181 inches decimal equivalent
• 120-degree standard point angle for positive engagement and reduced walking
• Bright/uncoated finish — compatible with a wide range of workpiece materials
• Regular spiral flute with right-hand cutting direction
• Straight-cylindrical shank at 1.00 mm diameter fits standard precision collets

Compatibility

Designed as an OEM-style miniature drill bit replacement or production-supply bit for precision machining setups requiring No. 77 wire-gauge diameter tooling with a straight-cylindrical shank.

Installation Notes

Installation and use should be performed by machinists or tooling technicians familiar with micro-diameter drill bit handling. Ensure the spindle and collet are clean and properly sized for the 1.00 mm shank before seating the bit. At this diameter, excessive feed pressure or runout can cause bit breakage — verify spindle runout is within tolerance before beginning a drilling cycle. Secure the workpiece firmly and use appropriate cutting fluid or lubrication per the workpiece material requirements.