Seco 02828372 ER32 Collet 8mm HP32 Series

Product Description

The SECO 02828372 is an ER32 precision collet in the HP32 series, designed for use in ER32-compatible collet chucks on CNC machining centers, milling machines, and manual machine tools. This collet accepts an 8 mm (0.3150 inch) tool shank and delivers a total indicator runout (TIR) of 0.003 mm (0.000118 inch), making it suitable for close-tolerance work where concentricity directly affects surface finish and tool life. The overall length is 40 mm and the overall diameter is 33 mm. No through-coolant is provided. Machinists and toolroom technicians install this collet as part of a standard ER32 toolholding setup.

This collet is suited for production and job-shop environments running milling, drilling, reaming, and tapping operations. It fits any machine spindle or toolholder configured for the ER32 collet series. The 8 mm bore accommodates end mills, drills, reamers, and taps with 8 mm shanks. The HP32 designation indicates a high-precision ground collet appropriate for applications where runout control is critical to dimensional accuracy.

Key Features

• ER32 series collet, HP32 high-precision designation
• 8 mm bore (0.3150 inch) for standard metric shank tooling
• 0.003 mm (0.000118 inch) TIR for tight concentricity control
• 40 mm overall length, 33 mm overall diameter
• No through-coolant — suited for dry or flood coolant setups where internal coolant is not required

Compatibility

Designed for use with any ER32-standard collet chuck or toolholder. Fits the ER32 collet series as defined by DIN 6499 / ISO 15488 geometry common across a wide range of machine spindles and toolholding systems.

Installation Notes

Installation is performed by machinists or toolroom technicians familiar with ER collet systems. Power down and lock out the machine spindle before seating or removing the collet. Use a calibrated torque wrench and the manufacturer-specified ER32 collet nut when tightening — do not use standard wrenches that can over- or under-torque the nut. Inspect the collet bore and chuck taper for chips or contamination before assembly, as debris directly degrades runout performance.