Accupro 587529 ER40 Collet 0.4370 Inch

Product Description

The ACCUPRO 587529 is an ER40 series collet designed for use in CNC machining centers, milling machines, and other rotating spindle equipment that accepts ER40 toolholding systems. This collet holds workpieces or cutting tools with a decimal inch size of 0.4370 inches and a minimum collet capacity of 0.406 inches, giving it a functional clamping range suited to a variety of shank diameters within that window. Machinists and tool crib technicians install these collets as part of standard toolchanging operations. The ER40 series is one of the most widely used collet standards in production and job-shop environments.

This collet is suited for use in any ER40-compatible collet chuck mounted in a mill spindle, lathe, or dedicated collet fixture. It is appropriate for both production runs and general-purpose machining operations where repeatable tool or workpiece holding is required. The single-piece quantity makes it a practical choice for replacing a worn or damaged collet in an existing set without purchasing a full range.

Key Features

• ER40 collet series for use with ER40-compatible collet chucks
• Nominal collet size of 0.4370 decimal inches
• Minimum collet capacity of 0.406 inches for clamping range flexibility
• Compact form factor: 2 inches height, 1 inch width, 1 inch length
• Lightweight at 0.6 pounds for easy handling during toolchanges

Compatibility

Designed as a direct-fit replacement for ER40 collet chucks and holders that accept the ER40 collet standard. Confirm chuck series compatibility before installation.

Installation Notes

Installation is performed by qualified machinists or toolroom technicians. The spindle or collet chuck must be fully de-energized and brought to a complete stop before removing or seating a collet. Use the appropriate ER40 collet wrench and chuck nut for proper seating and torque. Inspect the collet bore and chuck taper for chips or wear before installation to ensure accurate runout.