Accupro CY01010000MSC Drill Chuck 3/8 Inch Threaded 1/2-20

Product Description

The ACCUPRO CY01010000MSC is a keyed drill chuck designed for use with threaded-mount drilling equipment. It accepts bit shanks from 1/32 inch up to 3/8 inch (0.3750 inch decimal), making it suitable for a wide range of twist drills and step bits used in trade and light industrial work. The chuck mounts via a 1/2-20 threaded interface and uses a K34 key for tightening and releasing the jaws. The sleeve diameter measures 37 millimeters, and the chuck body is constructed from steel for durability under repeated use. Installation requires no adapters when paired with a compatible 1/2-20 threaded spindle.

This drill chuck fits benchtop drill presses, floor-standing drill presses, and portable drilling equipment equipped with a 1/2-20 threaded spindle. It is well suited for metal fabrication shops, electrical contractors drilling panel knockouts, plumbers boring holes through framing, and HVAC technicians drilling sheet metal or structural members. The keyed design provides a secure bit grip during high-torque operations, reducing bit slip compared to keyless alternatives. It is intended for professional trade use where consistent clamping force and repeatable bit changes are required.

Key Features

• Capacity range from 1/32 inch to 3/8 inch accommodates a broad selection of twist drills and step bits
• 1/2-20 threaded mount for direct installation on compatible spindles without adapters
• Keyed operation using K34 key for positive jaw engagement and reduced bit slip
• Steel chuck body for resistance to wear and deformation under load
• 37-millimeter sleeve diameter with plain bearing design
• Closed length of 60 millimeters and open length of 51 millimeters for compact profile

Compatibility

Designed as an OEM-style replacement or direct-fit chuck for drill presses and drilling equipment with a 1/2-20 threaded spindle mount.

Installation Notes

Installation should be performed by a qualified technician with the drill press or drilling tool fully de-energized and unplugged before work begins. Thread the chuck onto the 1/2-20 spindle by hand until snug, then secure according to the equipment manufacturer's procedure. Use the K34 key to verify jaw movement through the full capacity range before returning the tool to service. Inspect the chuck and key for wear or damage at regular service intervals.