Accupro 784955 ER25 Collet 0.188 Inch

Product Description

The ACCUPRO 784955 is an ER25 series collet designed to secure cutting tools in CNC machining centers, milling machines, lathes, and similar rotating spindle equipment. It accepts tool shanks at a nominal capacity of 0.188 inches with a minimum collet capacity of 0.172 inches, giving machinists a reliable clamping range for small-diameter end mills, drills, reamers, and other round-shank tooling. The ER25 standard is one of the most widely adopted collet formats in precision machining, and this collet fits any ER25-compatible chuck or collet holder. Machinists and tool-and-die professionals install this type of collet during tooling changes or as a direct replacement for worn or damaged collets in an existing set.

This collet is suited for use in both manual and CNC machining environments where ER25 collet chucks are already in service. Typical applications include precision milling, drilling, boring, and tapping operations in job shops, production facilities, and maintenance departments. The compact form factor, with a height of 1.9 inches and a cross-section of 1.2 inches by 1.2 inches, fits within standard ER25 chuck bodies without modification. It is sold as a single unit, making it practical for one-off replacements.

Key Features

• ER25 collet series for broad compatibility with ER25-standard collet chucks
• Nominal collet capacity of 0.188 inches for small-diameter tooling
• Minimum collet capacity of 0.172 inches for close-tolerance clamping range
• Compact dimensions: 1.9 inches height, 1.2 inches width, 1.2 inches length
• Lightweight at 0.1 pounds, minimizing added spindle load
• Sold individually for targeted replacement without buying a full set

Compatibility

Designed as an OEM-style replacement collet compatible with ER25-standard collet chucks and collet holders used in CNC and manual machining equipment.

Installation Notes

Installation of collets should be performed by a qualified machinist or tooling technician. Always power down and lock out the machine spindle before inserting or removing a collet from the chuck body. Inspect the collet bore and chuck body for debris, burrs, or damage before seating the collet to ensure proper runout. Never exceed the rated clamping capacity, as overtightening or undersized tooling can damage the collet or the chuck body.