Accupro 588860 ER20 Collet 0.247 Inches

Product Description

The ACCUPRO 588860 is an ER20 series collet designed for use in CNC machining centers, milling machines, and other rotating spindle applications that accept ER20 toolholders. This collet holds cutting tools with a decimal inch size of 0.247 inches and provides a minimum collet capacity of 0.234 inches, allowing it to grip within a defined clamping range. Weighing 0.5 pounds, it is a single-piece unit packaged individually. Machinists and toolroom technicians install ER collets as standard workholding components when securing end mills, drills, reamers, and similar round-shank tooling in production and job-shop environments.

The ACCUPRO 588860 is suited for use in any machine spindle or toolholder assembly that accepts the ER20 collet series. ER20 collets are common in light to medium-duty machining operations across general manufacturing, aerospace component work, and precision metalworking shops. This collet is appropriate for applications requiring accurate tool runout control and repeatable clamping at 0.247-inch shank diameters. It is typically installed by machinists, CNC operators, or toolroom technicians performing tool changes or machine setup.

Key Features

• ER20 collet series for use with ER20-compatible toolholders and spindles
• Nominal collet size of 0.247 inches for consistent shank grip
• Minimum collet capacity of 0.234 inches providing a defined clamping range
• Lightweight single-piece construction at 0.5 pounds
• Individual packaging with a minimum order quantity of one unit

Compatibility

Designed as a direct-fit replacement or toolroom addition for any ER20-standard collet chuck or toolholder that accepts the ER20 collet series.

Installation Notes

ER collets are installed and removed by machinists using an appropriate ER20 collet nut and spanner wrench. Always power down and lock out the machine spindle before changing collets. Inspect the collet and toolholder bore for chips, damage, or wear before seating the collet, as contamination directly affects runout and clamping force. Do not exceed the clamping range of the collet by attempting to grip shank diameters outside the rated capacity.