Parlec ER20-0393 ER20 Collet 0.3937 Inch 10mm

Product Description

The PARLEC ER20-0393 is an ER20 series collet designed for use in ER20-compatible toolholders and collet chucks. Sized at 0.3937 inches (10.00 mm), it accepts round shanked cutting tools and workholding applications requiring precise, repeatable clamping. The collet spans an overall length of 1.24 inches and an overall diameter of 0.827 inches. With a minimum collet capacity of 0.3543 inches (9.0 mm), it provides a defined clamping range suitable for standard end mills, drills, and reamers. Machinists and toolroom technicians install this collet into ER20 chucks used on CNC machining centers, lathes, and manual mills.

This ER20 collet is suited for light to medium metal removal operations in both production and job-shop environments. It is commonly used in vertical and horizontal machining centers, drilling machines, and manual milling setups where an ER20 spindle nose or toolholder is present. The 10.00 mm nominal size covers a broad range of metric and fractional shank tooling used in everyday machining operations.

Key Features

• ER20 collet series for use with standard ER20 chucks and toolholders
• Nominal collet size of 0.3937 inches (10.00 mm)
• Minimum collet capacity of 0.3543 inches (9.0 mm) for defined clamping range
• Overall length of 1.24 inches for compact fitment in ER20 toolholders
• Overall diameter of 0.827 inches
• Compatible with a wide range of round shank cutting tools including end mills, drills, and reamers

Compatibility

Designed as a direct-fit collet for ER20-series collet chucks and toolholders. Suitable for use with any ER20-compliant chuck conforming to DIN 6499 standards.

Installation Notes

Installation is performed by toolroom technicians or machinists. Before inserting or removing collets, ensure the machine spindle is fully stopped and the toolholder is removed from the spindle where applicable. Seat the collet fully into the nut before engaging the nut onto the chuck body to prevent damage to the collet taper. Inspect the collet bore and chuck taper for chips or contamination before assembly to maintain clamping accuracy.