Parlec 5UMER20-0500 ER20 Collet 0.5 Inch

Product Description

The PARLEC 5UMER20-0500 is an ER20 series collet sized for 0.5 inch tool shanks, designed for use in ER20-compatible collet chucks on milling machines, machining centers, and CNC toolholding systems. It holds a nominal 0.5 inch diameter with a minimum collet capacity of 0.451 inches, providing a clamping range suited to standard end mills, drills, and reamers of that shank size. Overall length is 1.24 inches. The part achieves a total indicator runout (TIR) of 0.0002 inches, supporting accurate, repeatable tool positioning in precision machining applications. Installation and tool changes are performed by machinists and CNC operators using a standard ER20 collet chuck and the appropriate spanner nut wrench.

The PARLEC 5UMER20-0500 is used in metalworking shops, job shops, and production machining environments wherever ER20 toolholding is specified. It is suited for light to medium milling, drilling, and reaming operations on vertical and horizontal machining centers, knee mills, and CNC routers equipped with ER20 collet chucks. The 0.5 inch size is one of the most commonly specified shank diameters across standard cutting tool lines, making this collet a frequent go-to in general-purpose toolroom setups.

Key Features

• ER20 series collet for 0.5 inch tool shank diameter
• Minimum collet capacity of 0.451 inches accommodates slight undersize shanks
• 0.0002 inch TIR for precise, low-runout tool clamping
• Overall length of 1.24 inches fits standard ER20 collet chuck bodies
• Lightweight at 0.19 pounds for easy handling during tool changes

Compatibility

Designed as a direct-fit collet for ER20-compatible collet chucks accepting 0.5 inch tool shanks.

Installation Notes

This collet is installed and removed by machinists using an ER20 spanner nut wrench and the appropriate collet chuck. Always power down and lock out the machine spindle before performing tool changes. Inspect the collet bore and chuck taper for chips, burrs, or damage before seating the collet. Do not exceed the rated clamping torque specified by the collet chuck manufacturer for the ER20 nut.