Parlec 40ERPN ER40 Collet Nut

Product Description

The PARLEC 40ERPN is an ER40 collet nut designed for use with ER40-series collet chucks in CNC machining and toolholding applications. The collet nut threads onto the collet chuck body and applies the clamping force needed to secure an ER40 collet and retain the cutting tool at the correct grip pressure. At 0.65 pounds, it is a solid, close-tolerance component built for repeated installation and removal cycles in production environments. Machinists, tool crib technicians, and CNC setup personnel are the primary users of this part.

The 40ERPN is used wherever ER40 collet chucks are employed - milling, drilling, reaming, and tapping operations on vertical and horizontal machining centers. ER40 is a widely adopted collet series in both job shop and high-volume production settings. This collet nut serves as a direct replacement or spare component for any ER40-compatible chuck body that accepts a standard ER40 collet nut thread form. Coolant-through functionality is not supported by this part.

Key Features

• Designed for the ER40 collet series - matches standard ER40 thread form and seating geometry
• No coolant-through design - suited for dry or flood coolant applications where internal coolant delivery is not required
• Sold individually - single-piece packaging supports tool crib restocking and replacement without overbuying
• Compact weight of 0.65 pounds minimizes added rotating mass on the spindle

Compatibility

Designed as an OEM-style replacement collet nut for ER40-series collet chuck bodies requiring a standard ER40 collet nut.

Installation Notes

Installation and removal of collet nuts should be performed by a qualified machinist or CNC setup technician using the correct spanner wrench for the ER40 nut profile. Always ensure the spindle is fully stopped and the machine is in a safe, locked-out state before servicing toolholders. Hand-tighten the collet nut to seat the collet, then apply final torque with a proper ER spanner wrench - do not use pipe wrenches or improvised tools, as these can damage the nut flats or distort the collet seat. Inspect the collet nut threads and seating taper regularly for wear, chips, or contamination before each use.