Parlec ER16-0312 ER16 Collet 0.312 Inch Bore

Product Description

The PARLEC ER16-0312 is an ER16-series collet designed for precision workholding in CNC machining and manual milling applications. With a collet bore of 0.312 inches and a minimum collet capacity of 0.273 inches, it accommodates a useful range of shank diameters within a single collet. The overall length is 1.082 inches and the overall diameter measures 0.669 inches. This collet is installed by machinists and toolroom technicians wherever repeatable, concentric tool clamping is required in ER16-compatible spindles and toolholders.

ER16 collets are common in compact CNC machining centers, benchtop mills, engravers, and high-speed spindle applications where small-diameter tooling is the norm. This particular collet accepts tooling shanks up to 0.312 inches, making it well-suited for end mills, drills, reamers, and taps in that size range. It is a standard-format collet appropriate for production, toolroom, and repair-shop environments where ER16 toolholding systems are already in service.

Key Features

• ER16 collet series for compatibility with standard ER16 chucks and toolholders
• 0.312 inch maximum bore accepts a range of common shank diameters
• Minimum collet capacity of 0.273 inches provides a practical clamping range within a single collet
• Compact overall length of 1.082 inches suits space-constrained spindle assemblies
• Overall diameter of 0.669 inches conforms to standard ER16 collet geometry

Compatibility

Designed for use with ER16-compatible collet chucks and toolholding systems. Accepts tool shanks from 0.273 inches to 0.312 inches in diameter.

Installation Notes

Installation is performed by machinists or toolroom technicians familiar with ER collet systems. Always ensure the spindle or toolholder is fully de-energized and at a complete stop before changing collets. Seat the collet in the collet nut before threading the nut onto the chuck body, and tighten to the toolholder manufacturer's specification using a proper collet wrench. Inspect the collet bore and seating taper for chips or damage before each use to maintain clamping accuracy.