Parlec ER40-0250 ER40 Collet 1/4 Inch

Product Description

The PARLEC ER40-0250 is an ER40 series collet designed for use in CNC machining centers, milling machines, and other rotating spindle equipment that accept ER40 toolholding systems. This collet clamps tool shanks at a nominal 0.25 inches (1/4 inch), with a minimum collet capacity of 0.211 inches, providing a reliable gripping range for end mills, drills, reamers, and similar cutting tools. The overall length is 1.811 inches. Machinists and toolroom technicians rely on ER-series collets for their concentricity, clamping force, and wide compatibility across standard ER40 chucks and toolholders.

The ER40-0250 is suited for production and job-shop environments where precise tool holding is required. It fits any standard ER40 collet chuck, making it a practical replacement or additional collet for shops running 1/4 inch shank tooling. Typical applications include milling, drilling, reaming, and tapping operations on CNC and manual machine tools.

Key Features

• ER40 series collet for broad chuck compatibility
• Nominal clamping size of 0.25 inches (1/4 inch)
• Minimum collet capacity of 0.211 inches for a usable gripping range
• Overall length of 1.811 inches for standard ER40 chuck seating
• Lightweight at 0.5 pounds for easy handling and toolchanger use

Compatibility

Designed for use with standard ER40 collet chucks and toolholders accepting the ER40 collet series.

Installation Notes

Installation is performed by a machinist or toolroom technician. Ensure the spindle is fully stopped and the machine is in a locked or e-stopped state before changing collets. Clean the collet and chuck bore of chips and coolant before seating the collet. Use the appropriate ER40 torque wrench or spanner nut to secure the collet nut to the chuck manufacturer's specified procedure - do not over-tighten by impact methods.