Parlec ER20-0315 ER20 Collet 0.315 Inches 8mm

Product Description

The PARLEC ER20-0315 is an ER20 series collet designed for use in ER20-compatible collet chucks on CNC machining centers, milling machines, and other precision rotating spindle equipment. With a collet size of 0.315 inches (8.00 mm) and an overall length of 1.24 inches, this collet secures workpieces and cutting tools within its clamping range. The minimum collet capacity is 0.2756 inches (7.0 mm), giving the user a defined clamping range suitable for standard tooling shanks in that size class. Installation and removal are performed by machinists and CNC toolroom technicians as part of routine tooling setup.

This collet is suited for precision machining applications in both production and job-shop environments. It fits into any ER20-standard collet chuck and is used when holding drills, end mills, reamers, or round-shank tooling in the 7.0 mm to 8.0 mm diameter range. It is appropriate for light to moderate cutting operations where accurate tool runout and consistent clamping force are required. Typical environments include horizontal and vertical machining centers as well as manual knee mills equipped with ER20 chucks.

Key Features

• ER20 series collet with 8.00 mm (0.315 inch) nominal collet size
• Clamping range from 0.2756 inches (7.0 mm) up to full nominal size
• Overall length of 1.24 inches for compact tool projection
• Designed to seat in standard ER20 collet chucks without modification
• Weighs 1 pound, keeping spindle assembly mass minimal

Compatibility

Designed as an OEM-style replacement or direct-fit collet for use with standard ER20 collet chucks in precision machining applications.

Installation Notes

Installation is performed by qualified machinists or CNC toolroom technicians. Before inserting or removing the collet, ensure the machine spindle is fully stopped and all power is locked out per applicable machine safety procedures. Seat the collet fully into the ER20 chuck nut before threading onto the chuck body, and use a calibrated collet wrench to tighten to the chuck manufacturer's specified torque. Inspect the collet bore and chuck taper for debris or damage before each use to maintain tool runout within acceptable limits.