Parlec ER40-0354 ER40 Collet 0.3543 Inch 9mm

Product Description

The PARLEC ER40-0354 is an ER40 series collet designed for use in ER40-compatible toolholders on CNC machining centers, milling machines, and other rotating spindle equipment. It accepts workpieces and cutting tool shanks up to 0.3543 inches (9.00 mm) in diameter, with a minimum collet capacity of 0.315 inches (8.0 mm). The overall length is 1.811 inches. This collet is installed and serviced by machinists and tool-and-die professionals working in production and job-shop environments.

The ER40-0354 is suited for high-speed milling, drilling, reaming, and tapping applications where consistent tool runout and secure clamping are required. The ER40 collet series is widely used in both manual and CNC setups across light and heavy production environments. It is a single-piece collet compatible with standard ER40 collet chucks and toolholders.

Key Features

• ER40 series collet for broad compatibility with ER40-standard toolholders
• Collet capacity range: 0.315 inches (8.0 mm) minimum to 0.3543 inches (9.00 mm) maximum
• Overall length of 1.811 inches for standard ER40 chuck engagement
• Single-piece construction for consistent clamping force and concentricity

Compatibility

Designed as an OEM-style replacement collet for use with ER40-standard collet chucks and toolholders accepting the ER40 collet series.

Installation Notes

Installation is performed by a machinist or toolroom technician. Always ensure the spindle is fully stopped and the machine is in a safe, powered-down state before changing collets. Use a calibrated collet wrench or spanner nut wrench sized for the ER40 chuck to achieve proper clamping torque. Inspect the collet bore and chuck taper for chips or debris before seating the collet.