Parlec ER25-0406 ER25 Collet 0.406 Inch Bore

Product Description

The PARLEC ER25-0406 is an ER25 series collet designed for use in ER25-compatible toolholding systems on CNC machining centers, milling machines, and similar rotating equipment. It accepts workpieces and cutting tool shanks up to 0.406 inches in diameter, with a minimum collet capacity of 0.367 inches, giving the tool a clamping range suited to standard fractional and metric shank tooling. The overall length is 1.338 inches and the overall diameter is 1.023 inches. This collet is installed by machinists and toolroom technicians and is a consumable-grade precision component in any production or job-shop environment.

ER25 collets are widely used in general machining applications where a reliable, repeatable toolholding interface is required. They seat into ER25 collet chucks mounted on spindles, collet blocks, or tap holders. Typical applications include end mill holding, drill holding, reaming, and tapping on vertical and horizontal machining centers. This size is appropriate for tooling with a 0.406 inch shank diameter in both production and maintenance machining settings.

Key Features

• ER25 series collet for use with ER25-compatible chucks and holders
• 0.406 inch maximum bore diameter with 0.367 inch minimum collet capacity
• 1.338 inch overall length for standard ER25 chuck depth compatibility
• 1.023 inch overall diameter matches ER25 collet envelope specifications
• Single-piece quantity suits toolroom stocking and individual replacement needs

Compatibility

Designed as a direct-fit replacement or addition for ER25-compatible collet chucks and toolholding systems requiring a 0.406 inch bore collet.

Installation Notes

Installation is performed by a machinist or toolroom technician. The spindle or chuck must be fully stopped and de-energized before seating or removing the collet. The collet should be inserted into the ER25 nut before threading onto the chuck body, per standard ER collet assembly practice. Do not exceed the rated clamping range for this collet size, as over- or under-size tooling shanks will reduce grip force and runout performance.