Parlec 5UMER16-0375 ER16 Collet 0.375 Inch

Product Description

The PARLEC 5UMER16-0375 is an ER16 series collet with a 0.375 inch (3/8 inch) collet size, designed for use in ER16-compatible collet chucks on milling machines, machining centers, and CNC lathes. It delivers a total indicator runout (TIR) of 0.0002 inches, making it suitable for applications where concentricity and tool holding precision are critical. The collet measures 1.082 inches in overall length and 0.669 inches in overall diameter. Machinists and tool room technicians use this collet to securely grip cutting tools, drills, reamers, and end mills during metal removal operations.

This collet fits standard ER16 collet chucks and is sized for tooling with a 0.375 inch shank. The minimum collet capacity is 0.336 inches, allowing it to grip slightly undersized shanks within the ER16 clamping range. It is used in both manual and CNC machining environments across job shops, production facilities, and maintenance tool rooms where repeatable tool holding and low runout are required. Each unit is sold individually.

Key Features

• ER16 collet series - compatible with standard ER16 collet chucks
• 0.0002 inch TIR for precise concentricity in close-tolerance machining
• 0.375 inch nominal collet size with a minimum capacity of 0.336 inches
• Compact 1.082 inch overall length suits tight spindle clearance situations
• 0.669 inch overall diameter fits standard ER16 chuck bore dimensions
• Lightweight at 0.06 pounds - does not add significant mass to the spindle assembly

Compatibility

Designed as a direct-fit replacement or spare for use in ER16-standard collet chucks requiring a 0.375 inch collet size. No specific compatible system families or replaced part numbers were provided in the product data.

Installation Notes

Installation is performed by machinists or tool room technicians. Before inserting or removing a collet, ensure the machine spindle is fully stopped and locked out per machine-specific lockout/tagout procedures. Seat the collet into the collet nut before threading the assembly into the chuck to avoid damaging the collet taper. Inspect the collet bore and chuck taper for chips or contamination prior to assembly, as debris will directly affect TIR performance.