Accupro A-6100191R Micro Drill Bit 1.91 Mm Solid Carbide

Product Description

The ACCUPRO A-6100191R is a solid carbide micro drill bit designed for precision drilling in tight-tolerance applications. It measures 1.91 mm (0.0752 inches) in diameter with an overall length of 38 mm and a flute length of 12 mm. The 120-degree standard point angle promotes accurate entry and reduces walking on hard surfaces. The bright, uncoated finish suits applications where coating buildup or contamination is a concern. This bit belongs to the Miniature series and is intended for machinists, tool-and-die technicians, and precision fabricators working on small-diameter bore requirements.

This micro drill bit fits drilling operations where extremely small hole diameters are required, such as printed circuit board work, instrument manufacturing, watchmaking fixtures, and precision mold or die components. The right-hand spiral flute geometry clears chips efficiently during through-hole and blind-hole drilling. The straight-cylindrical shank with a 2.00 mm diameter seats securely in standard collet chucks and drill chucks sized for miniature tooling. It is suited to CNC machining centers, drill presses, and precision hand-held drilling equipment operating at appropriate spindle speeds for carbide micro tooling.

Key Features

• Solid carbide construction for rigidity and wear resistance in hard and abrasive materials
• 1.91 mm (0.0752 inches) cutting diameter for precise micro-bore applications
• 120-degree standard point angle for controlled entry and reduced bit deflection
• Bright, uncoated finish — no coating interference in sensitive or contamination-critical applications
• Regular spiral flute with right-hand cut for efficient chip evacuation
• Straight-cylindrical shank at 2.00 mm diameter for broad collet and chuck compatibility

Compatibility

Designed as an OEM-style replacement and standard miniature series micro drill bit suitable for collet chucks and drill chucks accepting a 2.00 mm straight-cylindrical shank.

Installation Notes

Micro drill bits should be installed and removed by a qualified machinist using a properly sized collet or drill chuck; never force or overtighten. Secure the workpiece firmly before drilling to prevent bit deflection or breakage at small diameters. Run at manufacturer-recommended spindle speeds for solid carbide micro tooling in the specific work material. Inspect the cutting edge before each use — solid carbide is brittle at micro diameters and should be replaced rather than reground in the field.