Accupro A-6120133R Micro Drill Bit 1.33 Mm Solid Carbide

Product Description

The ACCUPRO A-6120133R is a solid carbide micro drill bit designed for precision drilling in tight-tolerance applications. Measuring 1.33 mm (0.0524 inches) in diameter with a 120-degree drill point angle, it delivers clean, accurate entry points in hard and abrasive materials where standard high-speed steel bits fall short. The bright, uncoated finish suits applications where coating residue or heat transfer is a concern. With a 30.00 mm overall length and a 1.50 mm straight-cylindrical shank, this bit fits standard precision chucks used in CNC machining centers, drill presses, and hand-held precision spindles. It is part of the Miniature Series, built for fine-detail work requiring consistent geometry and repeatable hole quality.

This micro drill bit is suited for machinists, tool-and-die makers, electronics fabricators, and precision metalworking shops working with ferrous and non-ferrous metals, plastics, composites, and printed circuit board substrates. The right-hand cutting direction and spiral flute design make it compatible with standard clockwise-rotation spindles. Typical applications include instrument manufacturing, medical device components, watchmaking, and any production environment requiring sub-2 mm bore diameters with tight positional tolerances.

Key Features

• Solid carbide construction provides superior hardness and wear resistance compared to HSS alternatives
• 1.33 mm (0.0524 inches) drill diameter for fine, precise bores in miniature workpieces
• 120-degree point angle reduces thrust force and improves centering on entry
• Bright, uncoated finish maintains dimensional accuracy without coating buildup
• 6.70 mm flute length with regular spiral flute for efficient chip evacuation in shallow holes
• 1.50 mm straight-cylindrical shank compatible with standard precision collets and chucks

Compatibility

Designed for use with standard precision spindles and collets accepting a 1.50 mm straight-cylindrical shank, common to CNC machining centers, micro drill presses, and precision hand-held rotary tools.

Installation Notes

Installation and use of this bit should be performed by qualified machinists or tooling technicians familiar with micro-diameter tooling. Ensure the spindle and collet are clean and properly seated before securing the shank to prevent runout. Power down and de-energize the machine before changing tooling. Micro carbide bits are brittle and susceptible to breakage from side loading, misalignment, or excessive feed rates — follow machine manufacturer recommendations for speeds and feeds at this diameter.