Parlec 25ERPN ER25 Collet Nut

Product Description

The PARLEC 25ERPN is an ER25 collet nut designed to secure ER25 series collets in compatible toolholders. The collet nut threads onto the toolholder nose and applies clamping force to the collet, holding cutting tools at the correct grip and runout tolerance. This component is a standard consumable in CNC machining centers, manual mills, and multi-axis turning setups. Machinists and toolroom technicians replace collet nuts when thread wear or damage compromises clamping consistency. At 0.26 pounds, the 25ERPN is a lightweight but precision-critical part in the spindle assembly.

The 25ERPN is suited for use in production machining environments where ER25 toolholding is the standard. ER25 collet systems are widely used in light to medium-duty milling, drilling, tapping, and reaming applications. This nut is appropriate for shops running high-cycle operations where collet nut condition directly affects tool life, surface finish, and dimensional accuracy.

Key Features

• Compatible with ER25 collet series for broad toolholder fitment
• Threaded collet nut design applies uniform clamping force across the collet taper
• Lightweight construction at 0.26 pounds minimizes added spindle mass
• Sold individually, suitable for single-nut replacement or stocking as a spare

Compatibility

Designed as an OEM-style replacement collet nut for ER25 series collet toolholding systems.

Installation Notes

Installation should be performed by a qualified machinist or toolroom technician. Power down and lock out the spindle before removing or installing any collet nut. Use a proper ER collet nut spanner wrench to achieve correct seating torque - do not use pliers or improvised tools, as these can damage the nut face or bearing surface. Inspect the collet and toolholder taper for debris or wear before reassembly.