Accupro 587386 ER40 Collet Set 23 Piece

Product Description

The ACCUPRO 587386 is a 23-piece ER40 collet set designed for precision workholding in CNC machining and manual milling applications. The set covers a collet capacity range from 0.118 inches (3 mm) to 1.023 inches (26 mm), with individual collets sized in 1 mm increments across the full range. Each collet is manufactured to a Total Indicator Runout (TIR) of 0.01 mm, supporting close-tolerance operations where concentricity directly affects surface finish and tool life. The ER40 series is among the most widely used collet standards in production machine shops, and this set is suited for machinists, toolroom technicians, and CNC setup personnel.

This collet set is intended for use in ER40-compatible collet chucks mounted in CNC machining centers, manual knee mills, lathes with collet chuck attachments, and similar machine tool spindles. The 23 included collets span metric sizes from 4 mm through 26 mm, providing coverage for a broad selection of end mills, drills, reamers, and other round-shank cutting tools. The set is appropriate for both production environments and toolroom use where a range of tool diameters must be held with consistent accuracy.

Key Features

• 23 collets included, covering metric sizes 4 mm through 26 mm in 1 mm increments
• ER40 collet system, compatible with standard ER40 collet chucks
• 0.01 mm TIR for consistent concentricity and reduced tool runout
• Collet capacity range of 0.118 to 1.023 inches (approximately 3 to 26 mm)
• Single package quantity suitable for toolroom stocking or direct machine setup use

Compatibility

Designed for use with ER40-series collet chucks conforming to the ER collet system standard. Compatible with any machine tool spindle or chuck body configured to accept ER40 collets.

Installation Notes

ER40 collets are installed and removed by a qualified machinist or CNC setup technician using the appropriate ER40 spanner nut and wrench. The machine spindle must be fully stopped and the machine powered down before changing collets. Collet and chuck mating surfaces should be clean and free of chips or coolant residue before seating to maintain TIR performance. Follow the machine tool manufacturer torque recommendations for the spanner nut to avoid collet damage or improper clamping.