Parlec 5UMER20-0125 ER20 Collet 0.125 Inch

Product Description

The PARLEC 5UMER20-0125 is an ER20 series collet with a 0.125 inch (1/8 inch) collet size and a minimum collet capacity of 0.086 inch. It delivers a total indicator runout (TIR) of 0.0002 inch, making it suitable for precision machining applications where concentricity is critical. The overall length is 1.24 inches and the overall diameter is 0.827 inch. This collet is installed in ER20-compatible collet chucks and is used by machinists, toolroom technicians, and CNC operators in production and job shop environments.

This collet is designed for use in ER20 collet chucks mounted in milling machines, machining centers, lathes, and similar CNC or manual machine tool setups. It accepts round shank cutting tools, drill bits, and end mills with a 1/8 inch shank. The 0.0002 inch TIR rating supports close-tolerance work including light milling, drilling, and reaming operations where tool runout directly affects part quality and surface finish.

Key Features

• ER20 collet series - fits standard ER20 collet chucks and nuts
• 0.125 inch (1/8 inch) collet size with 0.086 inch minimum collet capacity
• 0.0002 inch TIR for precision concentricity and reduced tool runout
• 1.24 inch overall length for compact toolholder stack-up
• 0.827 inch overall diameter
• Lightweight at 0.19 pounds

Compatibility

Designed for use with ER20-compatible collet chucks and collet nuts. Accepts tooling with a 1/8 inch round shank.

Installation Notes

Installation is performed by qualified machinists or toolroom technicians. Always power down and lock out the machine spindle before changing collets. Seat the collet fully into the collet nut before threading onto the chuck body, and use the appropriate ER20 collet wrench and torque to manufacturer specifications for the chuck in use. Inspect the collet bore and chuck taper for chips or contamination before assembly to maintain TIR performance.