Parlec ERS20-0157 ER20 Collet 4mm Bore

Product Description

The PARLEC ERS20-0157 is an ER20 series collet designed for precision workholding in CNC milling, drilling, and tapping operations. With a 4 mm bore diameter and an overall length of 1.24 inches, this collet seats into ER20-compatible toolholders to grip and center cutting tools with consistent clamping force. The ER20 series is one of the most widely used collet standards in machining, offering a broad clamping range and reliable concentricity for high-speed spindle applications. Machinists and CNC setup techs install these collets as standard consumables during tool changes and spindle maintenance.

This collet is suited for use in vertical and horizontal machining centers, CNC mills, and drill-tap centers equipped with ER20 collet chucks or toolholding nuts. The 4 mm bore accepts tools with a 4 mm shank, making it a common choice for small-diameter end mills, drills, and taps used in precision or high-mix-low-volume production environments. It is sold individually, making it practical for single-tool replacements or targeted inventory replenishment.

Key Features

• ER20 collet series - fits any ER20-compatible toolholder or collet chuck
• 4 mm bore diameter for precise shank grip on small cutting tools
• Overall length of 1.24 inches for standard ER20 chuck seating depth
• Clamping pressure rated at 1800 for secure tool retention at speed
• Sold individually - MOQ of 1, no minimum bulk purchase required

Compatibility

Designed as a direct-fit collet for any ER20-standard collet chuck or toolholder. Specific machine or chuck compatibility was not provided in the product data; verify ER20 collet chuck compatibility with your toolholder manufacturer before installation.

Installation Notes

ER20 collets are installed by machinists or CNC toolroom technicians as part of routine tool setup. Power down and lock out the spindle drive before handling collets or toolholders. Inspect the collet seating surface and the chuck bore for chips or wear before assembly; debris on either surface degrades clamping force and concentricity. Follow the toolholder manufacturer torque specification for the collet nut - overtightening can distort the collet and reduce tool life.