Accupro PNI03091800MSC Drill Chuck 1/8 in Keyless 3/8-24

Product Description

The ACCUPRO PNI03091800MSC is a keyless drill chuck designed for precision drilling applications requiring a threaded mount interface. It accepts drill bits and tooling up to 1/8 inch (0.1250 inch decimal) in diameter, with a minimum capacity of 0.0120 inch, making it suited for fine-bore work in light machining and toolroom environments. The chuck uses a 3/8-24 threaded mount and incorporates ball bearing construction for smooth, consistent jaw actuation. The stainless steel chuck body provides corrosion resistance in demanding shop conditions. This chuck is installed and serviced by machinists, tool and die makers, and maintenance technicians working with drill presses, CNC equipment, or hand-held pneumatic and electric drilling tools.

This chuck fits applications where a compact, keyless design is required for fast bit changes without a chuck key. With a sleeve diameter of 26.5 millimeters (approximately 1.04 inches) and a closed length of approximately 1.89 inches, it is suited for benchtop drill presses, small machining centers, and precision hand tools where space and weight constraints matter. The 0.28-pound weight keeps rotational mass low, which benefits high-cycle drilling operations. Typical use cases include light metalworking, electronics assembly tooling, and precision woodworking setups where repeatable bit holding is critical.

Key Features

• Keyless design allows rapid bit changes without a separate chuck key
• Ball bearing construction provides smooth jaw movement and consistent clamping force
• Stainless steel chuck body resists corrosion in coolant-exposed and high-humidity environments
• 3/8-24 threaded mount is a widely used standard interface on drill presses and portable tools
• Compact sleeve diameter of 26.5 millimeters suits confined spindle areas
• Low weight of 0.28 pounds reduces spindle load in high-speed applications

Compatibility

Designed as an OEM-style replacement or upgrade chuck for drilling tools and machines that accept a 3/8-24 threaded spindle mount and require a maximum tool shank capacity of 1/8 inch.

Installation Notes

Installation is performed by qualified machinists or maintenance technicians. Power down and lock out the machine before removing or installing any chuck. Thread the chuck onto the spindle by hand first to avoid cross-threading, then secure according to the machine manufacturer's torque guidance. Verify jaw runout with a dial indicator after installation before returning the tool to service.