Parlec ER40-0312 ER40 Collet 0.312 Inch

Product Description

The PARLEC ER40-0312 is an ER40 series collet designed for CNC machining centers, milling machines, and turning equipment that use ER40 toolholding systems. It accepts round shank cutting tools up to 0.312 inches in diameter and clamps down to a minimum capacity of 0.273 inches, providing a secure grip across that range. The overall length is 1.811 inches. Machinists and toolroom technicians rely on ER-style collets for their repeatable runout performance and broad compatibility with standard ER collet chucks.

This collet is suited for production and job-shop environments running drills, end mills, reamers, or taps with round shanks in the 0.273 to 0.312 inch range. It fits any ER40-rated collet chuck or toolholder conforming to the ER40 standard, making it a common stocking item for shops running a wide variety of cutting tool diameters. Both manual and CNC spindle applications are typical use cases.

Key Features

• ER40 collet series for use with standard ER40 chucks and toolholders
• 0.312 inch nominal collet size with a clamping range down to 0.273 inches
• 1.811 inch overall length for consistent projection in ER40 chucks
• Designed for repeatable tool seating and consistent runout control
• Lightweight at 0.5 pounds for easy handling during tool changes

Compatibility

Designed as a standard ER40-series collet compatible with any ER40 collet chuck or toolholder conforming to the ER40 specification.

Installation Notes

Installation is performed by machinists or toolroom technicians using a standard ER40 collet nut and spanner wrench. Ensure the spindle or toolholder is fully stopped and locked out before inserting or removing the collet. Seat the collet fully into the collet nut before threading it onto the chuck to avoid damage to the collet or chuck threads. Inspect the collet bore and chuck taper for chips or debris before assembly.