Accupro 784915 ER20 Collet 0.313 Inch Capacity

Product Description

The ACCUPRO 784915 is an ER20 series collet designed for precision workholding in CNC milling, drilling, and routing applications. With a collet size of 0.313 inches and a minimum collet capacity of 0.281 inches, this collet clamps cutting tools and workpieces securely within ER20-compatible toolholders and spindles. At 0.05 pounds, it is a compact, lightweight component suited for high-speed machining environments where runout control and consistent clamping force are critical. Machinists and CNC operators install this collet as part of standard ER20 toolholder assemblies on vertical and horizontal machining centers.

The ACCUPRO 784915 fits ER20 collet chucks used in a wide range of CNC machining centers, milling machines, and drill presses equipped with ER20-standard spindle tooling. It is appropriate for both production shops and job shops running light to medium cutting loads. The 0.313-inch capacity accommodates common fractional shank cutting tools, making it a frequently stocked collet size for general-purpose machining work.

Key Features

• ER20 collet series for compatibility with ER20-standard toolholders and chucks
• 0.313-inch collet size with a minimum capacity of 0.281 inches
• Compact profile: 1.9 inches in height, 1.2 inches in width, and 1.2 inches in length
• Lightweight at 0.05 pounds for reduced spindle load
• Single-piece package quantity suitable for individual replacement or toolcrib stocking

Compatibility

Designed as a standard ER20-series collet for use with ER20-compatible collet chucks and toolholders on CNC milling machines, machining centers, and drill presses.

Installation Notes

Installation is performed by a machinist or CNC operator. Power down and lock out the machine spindle before inserting or removing any collet. Seat the collet fully into the ER20 nut before threading onto the toolholder body, and tighten with the appropriate ER collet wrench to manufacturer torque guidelines. Inspect the collet bore and seating surfaces for chips or wear before each use to maintain clamping accuracy and prevent tool pullout.