Accupro 588862 ER20 Collet 0.31 Inches

Product Description

The ACCUPRO 588862 is an ER20 series collet designed for use in CNC machining centers, milling machines, and other rotating spindle equipment. It holds workholding and cutting tool shanks with a collet capacity of 0.31 inches and a minimum collet capacity of 0.281 inches. Rated to 1000 psi clamping pressure, it provides consistent tool grip during high-speed operations. Machinists and tool-room technicians install this collet as part of an ER20 collet chuck system, where precise tool runout control directly affects surface finish and dimensional accuracy.

This collet is suited for light-to-medium duty machining applications in production and job-shop environments. It fits any ER20-compatible collet chuck and is appropriate for holding end mills, drills, reamers, and similar round-shank tooling within its capacity range. The 0.31-inch size covers a commonly used shank diameter in standard tooling inventory.

Key Features

• ER20 collet series for use with ER20-compatible collet chucks
• 0.31-inch collet capacity with a minimum capacity of 0.281 inches
• 1000 psi clamping pressure rating for secure tool retention
• Single-piece package quantity for individual replacement or inventory builds
• Lightweight at 0.5 pounds for easy handling during tool changes

Compatibility

Designed as an OEM-style replacement or standard addition for any ER20-compatible collet chuck system requiring a 0.31-inch collet capacity.

Installation Notes

Installation is performed by qualified machinists or tool-room technicians. Power down and lock out the spindle drive before inserting or removing collets. Seat the collet fully into the collet nut before threading onto the chuck body, and use a calibrated torque wrench with the appropriate spanner to tighten to the chuck manufacturer's specification. Inspect collet bore and seating surfaces for chips or wear before each use.