Accupro 6586777/0859780 Micro Drill Chuck 1/2 in Keyed

Product Description

The ACCUPRO 6586777/0859780 is a micro drill chuck adapter and chuck set designed for use with rotating spindles and drilling equipment that accept a 0.5 inch straight shank. The keyed chuck accepts drill bits from 1/64 inch up to 5/32 inch, making it well suited for precision drilling operations where small-diameter bits must be held securely. The straight shank configuration allows straightforward installation into compatible drill presses, milling machines, and similar equipment. Machinists and toolroom technicians typically specify this type of adapter when downsizing to micro-diameter tooling without changing the host spindle.

This adapter and chuck combination is appropriate for light-duty precision drilling in machine shop, production, and toolroom environments. It is used when a standard spindle needs to accept micro drill bits for fine-detail work in metal, plastic, or composite materials. The keyed design ensures positive bit retention during operation, which is important when running small-diameter drills at higher speeds where bit slippage would cause breakage or dimensional error.

Key Features

• Straight shank diameter of 0.5 inches for compatibility with standard spindle bores
• Chuck capacity range of 1/64 inch to 5/32 inch accommodates a wide range of micro drill bits
• Keyed chuck design provides secure, positive bit clamping
• Adapter and chuck included as a single unit - no additional components required for installation
• UNSPSC Code 27112800 - classified under cutting and drilling tools

Compatibility

Designed as an OEM-style micro drill chuck adapter for rotating spindles and drilling equipment that accept a 0.5 inch straight shank bore.

Installation Notes

Installation is performed by machinists or qualified toolroom personnel. Before mounting, power down and lock out the host machine in accordance with applicable OSHA lockout/tagout procedures. Insert the straight shank fully into the spindle bore and secure according to the machine manufacturer's specifications. Verify chuck runout with a dial indicator before putting the assembly into production use.