Jacobs 31410 Keyless Drill Chuck 1/2 in 4MT Taper Shank

Product Description

The JACOBS 31410 is a keyless drill chuck designed for use with 4MT (Morse Taper 4) spindles on heavy-duty drilling equipment. It accepts round-shank drill bits from 3/64 inch (0.0394 inch) up to 1/2 inch (0.5120 inch) capacity, making it well suited for a wide range of drilling applications in metal, wood, and composite materials. The chuck features a ball bearing design and an integral taper shank mount. With a maximum rated speed of 7,000 RPM and a total indicated runout (TIR) of 0.0016 inch, this chuck delivers the precision and repeatability that machining and fabrication professionals require. The steel construction handles demanding production environments.

This chuck is intended for use on drill presses, milling machines, lathes, and similar machine tools equipped with a 4MT spindle. It suits industrial, commercial, and job shop environments where frequent bit changes demand a reliable keyless mechanism. Machinists, tool and die makers, and maintenance technicians working with large-frame drilling equipment are the primary installers. The keyless sleeve design allows rapid bit changes without a chuck key, reducing downtime during high-volume drilling operations.

Key Features

• Keyless operation for fast, tool-free bit changes up to 1/2 inch capacity
• 4MT integral taper shank mount for direct spindle engagement without an adapter
• Ball bearing design supports smooth operation and extended service life
• Maximum 7,000 RPM rated speed suitable for production drilling
• Low TIR of 0.0016 inch for consistent, accurate hole placement
• Steel chuck body built for heavy-duty shop and industrial use

Compatibility

Designed for machine tool spindles with a No. 4 Morse Taper (4MT) socket, including drill presses, milling machines, and lathes configured for 4MT tooling.

Installation Notes

Installation is performed by a machinist or qualified tool technician. Power down and lock out the machine at the main disconnect before mounting or removing the chuck. Seat the taper shank fully into the spindle socket using a soft mallet or draw bar as appropriate for the machine design - never force a taper with excessive side loading. Inspect the spindle socket and taper shank for burrs, chips, or corrosion before seating to ensure full contact and minimize runout.