Parlec 5UMER11-0187 ER11 Collet 0.1875 in Bore

Product Description

The PARLEC 5UMER11-0187 is an ER11 collet designed for precision tool holding in CNC machining centers, milling machines, and high-speed spindle applications. It accepts a 0.1875-inch bore diameter and delivers a total indicator runout (TIR) of 0.0002 inches, making it well-suited for finish milling, drilling, and reaming operations where concentricity matters. The overall length is 0.708 inches with an overall diameter of 0.452 inches. Machinists and CNC technicians install this collet into compatible ER11 collet chucks or tool holders as part of a standard tool holding setup.

This collet fits standard ER11 collet chuck systems used in precision machining environments, including production shops and tool rooms. The ER11 series is commonly found in compact spindle heads and high-speed routing applications where a smaller collet envelope is required. It is appropriate for light to moderate cutting loads across a range of workpiece materials when paired with the correct ER11 nut and holder.

Key Features

• 0.1875-inch bore diameter for direct tool shank clamping
• 0.0002-inch TIR for high concentricity and repeatable tool positioning
• 0.708-inch overall length suits compact ER11 holders
• 0.452-inch overall diameter conforms to ER11 collet geometry
• Single-piece collet construction for consistent clamping force

Compatibility

Designed as an OEM-style replacement collet for use with standard ER11 collet chuck holders and associated clamping nuts.

Installation Notes

Installation is performed by qualified machinists or CNC technicians. Before changing collets, power down and lock out the spindle drive per facility lockout/tagout procedures. Seat the collet fully into the ER11 nut before threading onto the holder, and never torque the nut without a tool shank or collet plug installed, as this can damage the collet seating surface. Inspect the collet bore and holder taper for chips or debris before assembly.