Parlec ERS20-0375 ER20 Collet 3/8 Inch

Product Description

The PARLEC ERS20-0375 is an ER20 series collet designed to hold workpieces and cutting tools with a 0.375 inch (3/8 inch) bore diameter. It measures 1.24 inches in overall length with an overall diameter of 0.827 inches. ER20 collets provide a spring-grip clamping action that centers the tool concentrically within the collet chuck, making them a standard choice for milling, drilling, and tapping operations on CNC and manual machining equipment. This collet is installed by machinists and tool room technicians.

The ERS20-0375 is suited for use in any ER20-compatible collet chuck or toolholder. Typical applications include light to medium milling, drilling, reaming, and tapping where a 3/8 inch shank tool or workpiece needs secure, concentric clamping. The ER20 series is widely used in CNC machining centers, manual milling machines, and drill presses across production and job shop environments.

Key Features

• ER20 collet series with 0.375 inch bore diameter for 3/8 inch shank tooling
• 1.24 inch overall length for compact toolholder projection
• 0.827 inch overall diameter fits standard ER20 chuck nuts and collet chucks
• Spring-grip design provides concentric clamping for accurate tool runout
• Rated to 1800 units clamping pressure per specification

Compatibility

Designed as an OEM-style replacement collet for use in ER20-compatible collet chucks and toolholders accepting a 3/8 inch bore collet.

Installation Notes

Installation is performed by a machinist or tool room technician. Before changing collets, ensure the machine spindle is fully stopped and the toolholder is removed from the spindle or the machine is powered down per shop lockout/tagout procedures. Insert the collet into the collet chuck nut before threading onto the holder body, and tighten the nut using the appropriate ER20 collet wrench and torque wrench to the chuck manufacturer's specification. Inspect the collet for wear, cracks, or deformation before each use and replace if damaged.