Accupro 784957 ER25 Collet 0.313 Inch

Product Description

The ACCUPRO 784957 is an ER25 series collet designed for use in CNC machining centers, milling machines, and other rotating spindle applications. It accepts a collet size of 0.313 decimal inches with a minimum collet capacity of 0.281 inches, making it suitable for gripping a range of small-diameter tooling. Machinists and tool-and-die professionals install ER collets as the primary workholding interface between the spindle and cutting tools such as end mills, drills, and reamers. The compact profile measures 1.9 inches in height and 1.2 inches in width and length, fitting standard ER25 collet chucks without modification.

This collet is used in residential shop environments and commercial production machine shops wherever ER25-compatible toolholding is required. It is appropriate for general-purpose milling, drilling, and light turning operations. The 0.313-inch collet size is a common fractional dimension used for standard shank tooling in everyday machining applications. A single collet is packaged per unit, making it straightforward to stock as a direct replacement or addition to an existing ER25 collet set.

Key Features

• ER25 collet series for use with standard ER25 collet chucks and toolholders
• 0.313 decimal inch collet size with a minimum capacity of 0.281 inches
• Compact dimensions: 1.9 inches height by 1.2 inches width by 1.2 inches length
• Lightweight at 0.1 pounds for minimal spindle load contribution
• Single-piece packaging for individual replacement or set supplementation

Compatibility

Designed as an OEM-style replacement or supplement for use with standard ER25 collet chucks and compatible toolholding systems.

Installation Notes

ER collets are installed by machinists or toolroom personnel following standard spindle lockout procedures before changing tooling. The collet should be seated properly into the collet nut before tightening onto the chuck body using the appropriate ER25 spanner wrench. Never impact-drive collet nuts, as this can damage the collet taper and reduce runout accuracy. Inspect the collet and chuck bore for debris or damage before each installation.