Value Collection SC80040991 ER16 Collet Chuck Straight Shank

Product Description

The VALUE COLLECTION SC80040991 is an ER16 collet chuck with a straight shank, designed for use in milling, drilling, and light machining operations. It accepts ER16 collets and covers a clamping range of 0.019 to 0.394 inches, making it suitable for a wide variety of tooling diameters. The chuck features a total indicator runout (TIR) of 0.0004 inches, supporting accurate, repeatable tool positioning. The shank diameter measures 5/8 inch with a shank length of 7.1 inches. Actuation is performed with a wrench via the collet nut, which has a hex diameter of 13/16 inch. Machinists and toolroom technicians are the primary installers and users of this chuck.

This ER16 collet chuck is suited for use in vertical machining centers, knee mills, and CNC lathes or mills that accept a straight-shank toolholder. The straight shank design allows it to be held in a variety of spindle or quill configurations. It is commonly used in production and job-shop environments where consistent runout and broad collet capacity coverage are required across multiple tool diameters.

Key Features

• ER16 collet system with a clamping range of 0.019 to 0.394 inches
• TIR of 0.0004 inches for precise, repeatable tool runout
• Straight shank with 5/8 inch diameter and 7.1 inch shank length
• Wrench-actuated collet nut with 13/16 inch hex diameter
• Collet nut diameter of 0.86 inches and lock nut length of 0.68 inches
• Compact overall footprint suitable for tight-clearance machining setups

Compatibility

Designed as an OEM-style replacement or direct-fit toolholder for machines accepting a straight-shank ER16 collet chuck with a 5/8 inch shank diameter.

Installation Notes

Installation and tool changes should be performed by a qualified machinist or toolroom technician with the machine powered down and the spindle fully stopped. Use the correct ER16 collet wrench and spanner to properly seat and torque the collet nut — never use improvised tools that could damage the nut or chuck body. Verify runout with a dial indicator after installation before beginning any cutting operation. Follow the machine manufacturer's guidelines for shank retention and drawbar force where applicable.