Value Collection 290-1704 Taper Drill Chuck Arbor JT4

Product Description

The VALUE COLLECTION 290-1704 is a taper drill chuck arbor designed to connect a JT4-mount drill chuck to a straight-shank machine spindle. The arbor features a 5/8-inch straight shank that seats into the spindle, while the JT4 Jacobs taper on the opposite end accepts compatible drill chucks. With a shank length of 2.5 inches, this arbor provides a secure, concentric interface between the chuck and the machine. Machinists, tool-room technicians, and maintenance professionals install this type of arbor on drill presses, milling machines, and similar equipment when mounting or replacing drill chucks.

This arbor is suited for use on benchtop and floor-standing drill presses, vertical milling machines, and other machine tools that accept a 5/8-inch straight shank. The JT4 Jacobs taper mount is a widely used standard in drill chuck attachment, making this arbor a practical replacement or spare component in shop environments where chuck changes are routine. It is appropriate for light-duty to medium-duty drilling applications across general metalworking, woodworking, and maintenance trade settings.

Key Features

• JT4 Jacobs taper mount accepts standard JT4-compatible drill chucks
• 5/8-inch straight shank diameter fits machine spindles requiring that bore size
• 2.5-inch shank length provides adequate engagement depth for secure mounting
• Tapered mount design ensures concentric chuck-to-spindle alignment
• Lightweight at 0.037 pounds, minimizing added mass on the spindle

Compatibility

Designed as a standard replacement or spare arbor for machine tools equipped with a 5/8-inch straight-shank spindle and requiring a JT4 Jacobs taper chuck mount.

Installation Notes

A qualified machinist or maintenance technician should install this arbor. Power down and lock out the machine before any chuck or arbor service. The straight shank must be fully seated and secured in the spindle collet or set-screw socket before use. When seating the JT4 taper, use a firm press-fit or arbor press rather than striking the chuck directly with a hammer to avoid damaging the taper surface.