Parlec 5UMER16-0187 ER16 Collet 0.1875 in 3/16

Product Description

The PARLEC 5UMER16-0187 is an ER16 series collet with a 0.1875 inch (3/16 inch) collet size, designed for use in ER16-compatible tool holders and collet chucks. It delivers a total indicated runout (TIR) of 0.0002 inches, making it suitable for precision machining applications where concentricity directly affects surface finish and tool life. The collet has an overall length of 1.082 inches and an overall diameter of 0.669 inches. Machinists and tooling technicians install these collets in CNC machining centers, milling machines, and drilling setups that accept the ER16 standard.

This collet is used in light-duty to medium-duty cutting operations where a 3/16 inch shank tool must be held with minimal runout. Typical applications include end milling, drilling, reaming, and tapping in both vertical and horizontal machining setups. The minimum collet capacity of 0.148 inches allows it to grip a range of shank diameters within that clamping window. It fits production and job-shop environments operating ER16 collet systems.

Key Features

• ER16 series collet for use with standard ER16 tool holders and chucks
• 0.0002 inch TIR for high concentricity and consistent tool positioning
• 3/16 inch (0.1875 inch) nominal collet size with a minimum capacity of 0.148 inches
• Compact 1.082 inch overall length suits space-constrained spindle setups
• 0.669 inch overall diameter consistent with ER16 collet geometry

Compatibility

Designed as an OEM-style replacement or direct-fit collet for tooling systems that accept the ER16 collet standard.

Installation Notes

ER16 collets are installed by machining technicians using the appropriate ER16 collet nut and wrench. Before installation, clean the collet taper, bore, and holder pocket to remove chips, oil, and debris that can affect runout. Never strike a collet to seat it, and never overtighten the collet nut beyond the recommended torque range for the holder manufacturer. Inspect the collet for wear or cracking before each use, as damaged collets should be replaced immediately.