Accupro 588248 ER40 Collet 0.435 Inch

Product Description

The ACCUPRO 588248 is an ER40 series collet designed for use in CNC machining centers, milling machines, and other rotating spindle equipment that accept the ER40 collet standard. This collet holds workpieces or cutting tools with a nominal capacity of 0.435 inches and a minimum collet capacity of 0.422 inches, providing a secure clamping range suited to close-tolerance toolholding applications. Machinists and toolroom technicians install this collet into compatible ER40 collet chucks as part of standard toolholding setups. The collet is sold individually as a single unit.

This collet is used in production machining and toolroom environments where the ER40 collet system is the standard toolholding interface. Typical applications include end mill holding, drill chuck setups, and reamer or tap holding on vertical machining centers, horizontal mills, and CNC lathes equipped with live tooling. It is appropriate for both high-volume production runs and precision one-off work where consistent tool runout and repeatable grip force are required.

Key Features

• ER40 collet series for use with standard ER40 collet chucks and nuts
• 0.435 inch nominal capacity with a minimum collet capacity of 0.422 inches
• Designed for consistent clamping force and low runout in rotating spindle applications
• Single-piece packaging allows individual replacement without purchasing a full set
• Rated to 1000 units of pressure for reliable tool retention under load

Compatibility

Designed as an OEM-style replacement or direct-fit collet for machine spindles and collet chucks built to the ER40 toolholding standard.

Installation Notes

Installation is performed by qualified machinists or toolroom technicians. Before installing or removing a collet, ensure the machine spindle is fully stopped and the machine is locked out per applicable safety procedures. Insert the collet into the ER40 collet chuck and thread on the collet nut by hand before tightening with the appropriate collet wrench to the chuck manufacturer's specified torque. Inspect the collet seating surface and chuck bore for chips or contamination before assembly to maintain tool runout specifications.