Accupro 784914 ER20 Collet 0.375 Inch 3/8

Product Description

The ACCUPRO 784914 is an ER20 series collet designed for use in ER20-compatible toolholders on CNC machining centers, manual mills, and other rotating spindle equipment. It accepts shank tooling up to 0.375 inches (3/8 inch) in diameter, with a minimum collet capacity of 0.343 inches, providing a secure clamping range suitable for end mills, drills, reamers, and similar cutting tools. Machinists and tool-crib technicians install ER collets as standard workholding components. The compact form factor measures 1.9 inches in height and 1.2 inches in width and length, and the unit weighs 0.05 pounds.

This collet is suited for light to medium-duty material removal operations in residential shop, commercial machine shop, and production environments. The ER20 series is a widely adopted collet standard, making this part a routine replacement or additional-inventory item for shops running ER20 toolholders. It is appropriate wherever precise, repeatable tool runout and consistent clamping force are required in an ER20 spindle setup.

Key Features

• ER20 collet series for use with ER20-compatible toolholders
• 0.375 inch (3/8 inch) nominal collet size
• Minimum collet capacity of 0.343 inches for clamping range flexibility
• Compact dimensions: 1.9 inches height, 1.2 inches width, 1.2 inches length
• Lightweight at 0.05 pounds for easy handling during tool changes

Compatibility

Designed as a standard ER20-series collet for use in any ER20-compatible toolholder or collet chuck accepting 0.375 inch shank tooling.

Installation Notes

ER collets are installed by machinists and CNC operators. Before changing tooling, power down the spindle and verify the machine is in a safe, locked-out state per your facility lockout/tagout procedures. Clean the toolholder bore and collet seating surface before installation to ensure proper runout. Do not exceed the collet clamping range; using tooling outside the specified capacity range can result in slippage or damage.