Accupro 784862 ER16 Collet 0.406 Inch

Product Description

The ACCUPRO 784862 is an ER16 series collet designed for use in CNC machining centers, milling machines, and other rotating spindle applications. It accepts a maximum tool shank diameter of 0.406 inches with a minimum collet capacity of 0.375 inches, making it suited for close-tolerance work holding of end mills, drills, and reamers within that range. The collet measures 1.9 inches in height and 1.2 inches in diameter and weighs 0.05 pounds. Machinists and tool room technicians install this collet as part of a standard ER16 collet chuck system. Precision ground to ER16 specification, it delivers consistent runout performance for light-duty to medium-duty cutting operations.

The ACCUPRO 784862 is appropriate for use in vertical and horizontal machining centers, drill presses, and any spindle equipped with an ER16-compatible collet chuck. It is commonly used in job shops, production machining environments, and tool rooms where a variety of small-diameter cutting tools must be held securely. The 0.375 inch to 0.406 inch clamping range makes this collet a practical choice for holding metric and imperial tool shanks that fall within that capacity window.

Key Features

• ER16 collet series for use with standard ER16 collet chucks
• Maximum collet capacity of 0.406 inches for close-tolerance tool holding
• Minimum collet capacity of 0.375 inches, providing a 0.031 inch clamping range
• Compact form factor: 1.9 inches height, 1.2 inches diameter
• Lightweight at 0.05 pounds, minimizing added spindle load

Compatibility

Designed as a direct-fit replacement or spare for any spindle or collet chuck system built to the ER16 collet standard.

Installation Notes

Installation is performed by a machinist or tool room technician. Before inserting or removing the collet, power down the spindle completely and confirm the machine is in a locked-out state per applicable safety procedures. Seat the collet into the ER16 collet chuck nut before threading it onto the chuck body to avoid damaging the collet groove. Torque the chuck nut using an appropriate ER spanner wrench to the chuck manufacturer specifications — do not over-tighten by hand or with improvised tools.