Accupro 784763 ER20 Collet 0.346 Inch

Product Description

The ACCUPRO 784763 is an ER20 series collet designed for use in CNC machining centers, milling machines, and other rotating spindle equipment that accepts ER20 toolholders. The collet holds workpieces or cutting tools up to 0.346 inches in diameter, with a minimum collet capacity of 0.313 inches, providing a clamping range well suited to small-diameter end mills, drills, and reamers. The overall length measures 1.22 inches. Machinists and toolroom professionals install this collet when equipping spindles for precision material removal operations where accurate tool runout and secure clamping are required.

This collet is appropriate for use in both production and job-shop environments running ER20-compatible toolholding systems. It fits the standard ER20 collet nut and chuck configuration found on a wide range of vertical and horizontal machining centers, CNC routers, and manual mills. The 0.346-inch nominal size targets common fractional and metric shank tool diameters that fall within its clamping range, making it a frequently stocked size in general-purpose toolrooms handling light to medium cutting operations.

Key Features

• ER20 collet series for use with standard ER20 chucks and collet nuts
• Nominal collet size of 0.346 inches with a minimum capacity of 0.313 inches
• Overall length of 1.22 inches fits standard ER20 toolholder geometry
• Lightweight construction at 0.1 pounds for easy handling and quick changeover
• Single-piece quantity packaging suitable for individual replacement or toolroom stocking

Compatibility

Designed as an OEM-style replacement or standard toolroom addition for spindle systems using ER20-series collet chucks and collet nuts.

Installation Notes

Installation is performed by qualified machinists or toolroom technicians. Before installing or removing the collet, confirm the machine spindle is fully stopped and the machine is in a safe, locked-out state per shop safety procedures. The collet seats into an ER20 chuck body and is secured with the corresponding ER20 collet nut; use the correct spanner wrench size for the nut to achieve proper clamping torque. Do not exceed the collet clamping range or attempt to clamp tool shanks outside the stated capacity, as this can damage the collet and compromise runout accuracy.