Value Collection 204-4048 ER40 Collet 0.75 in

Product Description

The VALUE COLLECTION 204-4048 is an ER40 series collet designed for use in CNC machining centers, milling machines, and other rotating spindle equipment that accepts ER40 collet chucks. The collet holds workpieces or cutting tools with a clamping diameter of 0.75 inches and delivers a total indicator runout (TIR) of 0.0005 inches, making it suitable for precision machining operations where concentricity is critical. Machinists and tool-room technicians install these collets when setting up end mills, drills, reamers, or round-shank tooling in ER40-compatible toolholders.

This collet is intended for use in ER40 collet chucks found on vertical and horizontal machining centers, manual milling machines, and lathe live-center applications in both production and job-shop environments. The 0.75-inch bore size accommodates standard round-shank tooling and workpieces of that diameter. It is a single-piece collet sold individually and suits shops that need a replacement or additional collet for an existing ER40 chuck setup.

Key Features

• ER40 collet series — fits all ER40-compatible collet chucks
• 0.75-inch clamping diameter for standard round-shank tooling
• 0.0005-inch TIR for precision concentricity in critical machining operations
• Sold individually, allowing targeted replacement without buying a full set
• Lightweight at 0.44 pounds for easy handling during tool changes

Compatibility

Designed as an OEM-style replacement or supplemental collet for use in any ER40-standard collet chuck accepting a 0.75-inch bore collet.

Installation Notes

Installation is performed by machinists or tool-room technicians following standard toolholding procedures. Before inserting or removing a collet, ensure the machine spindle is fully stopped and the tool changer or spindle lock is engaged per the machine manufacturer's guidelines. Seat the collet fully into the ER40 collet nut before threading the nut onto the chuck body, and torque the nut with the appropriate ER40 spanner wrench to the chuck manufacturer's specification. Inspect the collet bore and seating taper for chips or debris before each use to maintain the rated TIR.