Accupro 588266 ER40 Collet

Product Description

The ACCUPRO 588266 is an ER40 series collet designed for use in CNC machining centers, milling machines, lathes, and other rotating spindle equipment. ER collets are the industry-standard workholding solution for securing cutting tools and workpieces during precision machining operations. This collet weighs 0.85 pounds and is rated to 1000 PSI clamping pressure, providing reliable tool grip across a wide range of cutting applications. Machinists and toolroom technicians rely on ER40 collets for their ability to accommodate a broad bore range within a single collet nut system, reducing setup time and tool inventory requirements.

The ER40 series collet is suited for production machining environments where consistent tool runout and repeatable clamping force are critical. Typical applications include end milling, drilling, reaming, and tapping in both manual and CNC setups. The ER40 designation indicates a 40 mm collet body diameter, placing it in the mid-to-large size range of the ER collet family, appropriate for larger spindle toolholders commonly found in full-size vertical and horizontal machining centers.

Key Features

• ER40 series collet body for compatibility with standard ER40 toolholders and collet nuts
• 1000 PSI rated clamping pressure for secure tool retention under cutting loads
• Single-piece collet package quantity for individual replacement or toolroom stocking
• Lightweight at 0.85 pounds for easy handling and spindle balance considerations

Compatibility

Designed as an OEM-style replacement or direct-fit addition for ER40 series toolholders and collet nut assemblies used in standard CNC and manual spindle machines.

Installation Notes

Installation of ER collets should be performed by a qualified machinist or toolroom technician. Before installing or removing a collet, ensure the machine spindle is fully stopped and the machine is powered down or placed in an e-stop state. Seat the collet into the toolholder before threading on the collet nut, and use a calibrated collet wrench and torque method appropriate to the toolholder manufacturer specifications. Inspect the collet bore and seating taper for chips or damage before each use to maintain runout accuracy.