Kennametal 1729906 ER32 Collet 3/8 Inch

Product Description

The KENNAMETAL 1729906 is an ER32 precision collet sized for 0.375 inch (3/8 inch) tool shanks. It is designed for use in ER32-compatible collet chucks mounted in CNC machining centers, milling machines, and lathes. The collet delivers a maximum total indicator runout (TIR) of 0.0152 mm (0.000600 inch), making it suitable for applications where concentricity and repeatability are critical. Overall length is 1.575 inches (40.01 mm). The minimum collet capacity is 0.335 inch, allowing it to clamp a small range of shank diameters below the nominal size. This collet is typically installed and serviced by machinists and toolroom technicians.

This collet is appropriate for use in production machining environments, toolroom applications, and precision milling or drilling operations that demand tight runout tolerances. It fits standard ER32 collet chucks used across a wide range of machine tool brands and configurations in both job shop and high-volume manufacturing settings. The 3/8 inch nominal size accommodates common end mills, drills, and boring tools with 0.375 inch shanks.

Key Features

• ER32 collet series - fits any standard ER32 collet chuck
• 0.375 inch (3/8 inch) nominal collet size for common tool shanks
• Maximum TIR of 0.0152 mm (0.000600 inch) for high concentricity
• Overall length of 1.575 inches (40.01 mm)
• Minimum collet capacity of 0.335 inch for slight undersize shank clamping
• Lightweight at 0.3086 pounds - easy single-handed handling during tool changes

Compatibility

Designed as an OEM-style replacement collet for use in standard ER32 collet chuck systems. Fits any machine tool or toolholder configured for the ER32 collet series.

Installation Notes

Installation is performed by qualified machinists or toolroom technicians. Before inserting or removing the collet, ensure the machine spindle is fully stopped and the collet chuck is clear of any stored energy. Seat the collet fully into the collet chuck nut before threading the nut onto the chuck body to avoid cross-threading or collet damage. Torque the collet nut using an appropriate ER32 spanner wrench - do not use makeshift tools that may damage the nut flats or collet seating surfaces.