Accupro A-6120185R No. 49 Micro Drill Bit Solid Carbide

Product Description

The ACCUPRO A-6120185R is a solid carbide micro drill bit designed for precision drilling in tight-tolerance applications. It carries a No. 49 wire gauge designation with a decimal inch equivalent of 0.0728 inches and a metric diameter of 1.85 mm. The 120-degree point angle delivers clean entry geometry suited for harder materials and minimizes walking on entry. A spiral flute with a regular helix promotes chip evacuation in shallow-to-moderate depth holes. This bit is part of ACCUPRO's Miniature Series and is installed by machinists, toolmakers, and precision fabricators working in metal, printed circuit board, and tight-tolerance assembly environments.

This bit fits applications where small-diameter through-holes or blind holes are required in production or repair settings. The bright, uncoated finish makes it appropriate for use in a range of base materials where coating buildup could affect hole diameter tolerances. The straight-cylindrical shank with a 2.00 mm diameter seats directly into standard collets and chucks compatible with that shank size. Overall length is 38.00 mm, with a flute length of 8.40 mm, keeping the tool compact and rigid for micro-drilling work.

Key Features

• No. 49 wire size — 1.85 mm (0.0728 inches) cutting diameter for precision small-hole work
• 120-degree standard point angle for accurate entry and reduced deflection
• Solid carbide construction for rigidity and wear resistance in hard materials
• Spiral flute with regular helix for consistent chip evacuation
• Bright, uncoated finish — no coating buildup affecting hole diameter
• Straight-cylindrical 2.00 mm shank for direct collet or chuck mounting

Compatibility

Designed as an OEM-style replacement or production consumable for use in CNC machining centers, drill presses, and hand-held precision drilling equipment accepting a 2.00 mm straight-cylindrical shank.

Installation Notes

Install by a qualified machinist or toolmaker using a collet or drill chuck rated for the 2.00 mm shank diameter. Ensure the spindle is fully stopped and the machine is powered down or in a safe locked-out state before changing tooling. Do not exceed the recommended spindle speed range for the workpiece material and bit diameter. Micro drill bits are brittle — avoid side loading, misalignment, or using the bit to ream or enlarge an existing hole.