Accupro 785049 ER40 Collet 0.813 Inch

Product Description

The ACCUPRO 785049 is an ER40 series collet designed for use in CNC machining centers, milling machines, and other rotating spindle equipment that accepts ER40 toolholding systems. This collet holds cutting tools and workholding shanks with a capacity of 0.813 inches decimal inch size, with a minimum collet capacity of 0.781 inches. The ER40 collet style is a widely adopted standard in precision machining, offering reliable clamping force and runout control for end mills, drills, reamers, and taps. It is installed by machinists, tool-and-die makers, and CNC setup technicians in both production and job-shop environments.

This collet is suited for light to heavy-duty material removal operations in residential shop and commercial production settings alike. The ER40 series accommodates a broad range of shank diameters, making it a versatile choice for toolrooms that standardize on a single collet chuck system. The 1.75 inch width and 2 inch height fit standard ER40 chucks used across a wide variety of spindle configurations.

Key Features

• ER40 collet series for use with ER40-compatible chucks and tool holders
• Decimal inch capacity of 0.813 inches with minimum capacity of 0.781 inches
• Height of 2 inches and width of 1.75 inches for standard ER40 chuck fitment
• Lightweight at 0.6 pounds for reduced spindle load
• Single-piece package quantity for individual replacement or toolroom stocking

Compatibility

Designed for use with ER40-compatible collet chucks and toolholding systems that accept the ER40 collet standard.

Installation Notes

Installation is performed by a machinist or CNC technician. Always power down and lock out the machine spindle before changing collets. Inspect the collet bore and chuck nut seating surfaces for chips or wear before installation. Avoid overtightening the collet nut, as this can deform the collet and reduce clamping accuracy.