Accupro ER32HP 12.7 Er Collet 1/2 Inch ER32

Product Description

The ACCUPRO ER32HP 12.7 is an ER-style collet designed for use in ER32 collet chucks on CNC machining centers, milling machines, and other rotating spindle equipment. It accepts a 1/2-inch tool shank and holds a Total Indicator Runout (TIR) of 0.0002 inches (0.005 mm), making it suitable for precision drilling, reaming, and light milling operations. The collet is installed by machinists and toolroom technicians as part of a standard ER32 toolholding system. Its close-tolerance construction supports repeatable tool positioning across high-cycle production environments.

This collet fits ER32 collet chucks commonly found on vertical machining centers, drill-tap machines, and manual knee mills used in both job shop and production floor settings. It is suited for light to medium-duty cutting applications where consistent grip and low runout are required. The 1/2-inch clamping diameter accommodates a wide range of standard cutting tool shanks including end mills, drills, and reamers in that size.

Key Features

• ER32 collet series — fits standard ER32 collet chucks
• 1/2-inch clamping diameter for common cutting tool shanks
• TIR of 0.0002 inches (0.005 mm) for precision toolholding
• Compact profile: approximately 1.23 inches tall and 1 inch in diameter
• Lightweight at 0.35 pounds for easy handling and quick changeover

Compatibility

Designed as a direct-fit replacement collet for ER32 collet chuck systems accepting a 1/2-inch tool shank.

Installation Notes

ER collets are installed and removed by toolroom technicians and machinists using an ER32 collet nut and a suitable spanner wrench. Always ensure the spindle is fully stopped and the machine is locked out before changing collets. Inspect the collet bore and chuck taper for chips or debris before seating the collet to maintain TIR specification. Do not exceed the collet clamping range or use damaged collets, as this compromises tool grip and runout performance.