Parlec ER20-0375 ER20 Collet 3/8 Inch

Product Description

The PARLEC ER20-0375 is an ER20 series collet designed for use in CNC machining centers, milling machines, and other rotating spindle equipment that accept ER20 toolholding systems. This collet holds workpieces and cutting tools with a nominal capacity of 0.375 inches (3/8 inch), with a minimum collet capacity of 0.336 inches, allowing it to grip a range of shank diameters within that span. Overall length is 1.24 inches and overall diameter is 0.827 inches. It is installed by machinists and toolroom technicians in production and job-shop environments where precise, repeatable tool clamping is required.

This collet is suited for light to medium-duty material removal operations in both manual and CNC-controlled machining setups. Typical applications include end milling, drilling, reaming, and tapping where an ER20 collet chuck or collet block is already in use. The compact overall length of 1.24 inches suits installations where spindle clearance is a consideration.

Key Features

• ER20 collet series for use with standard ER20 collet chucks and holders
• Nominal capacity of 0.375 inches (3/8 inch) with minimum capacity of 0.336 inches
• Overall length of 1.24 inches for compact tool projection
• Overall diameter of 0.827 inches
• Lightweight at 0.1 pounds for minimal spindle load contribution

Compatibility

Designed for use with ER20-standard collet chucks and collet blocks accepting the ER20 collet series.

Installation Notes

Installation is performed by a machinist or toolroom technician. Always power down and lock out the machine spindle before inserting or removing collets. Seat the collet fully into the collet chuck nut before threading onto the holder, and torque the nut using a proper ER spanner wrench to the chuck manufacturer's specification. Inspect the collet bore and seating taper for chips or contamination before each use to maintain clamping accuracy and runout performance.