Accupro 785043 ER40 Collet 1 Inch

Product Description

The ACCUPRO 785043 is an ER40 series collet designed for use in ER40-compatible collet chucks on CNC machining centers, manual mills, lathes, and toolholding systems. With a collet size of 1 inch (1.0000 decimal inch) and a minimum collet capacity of 0.969 inches, this collet provides a precise clamping range suitable for securing round shank tooling and workpieces. Machinists and toolroom technicians install ER collets as part of a rotating toolholding assembly to transmit cutting forces accurately and maintain runout tolerances during milling, drilling, reaming, and tapping operations.

This collet is suited for production machining environments and job shops running CNC or manual equipment with ER40 collet chucks. It is appropriate for both roughing and finishing operations where secure, repeatable tool clamping is required. The 1-inch collet size accommodates tooling with a full 1-inch shank diameter, while the tapered collet body ensures even clamping pressure across the tool shank when the chuck nut is torqued to specification.

Key Features

• ER40 collet series for use with ER40-compatible chuck bodies
• 1-inch (1.0000 decimal inch) collet size with 0.969-inch minimum capacity
• Tapered collet design distributes clamping load evenly around the tool shank
• Compact form factor: 1.75 inches height, 1.5 inches width, 1.5 inches length
• Lightweight at 0.35 pounds for easy handling during tool changes

Compatibility

Designed as an OEM-style replacement or standard toolholding component for use with ER40 collet chucks in CNC and manual machining applications.

Installation Notes

ER collets are installed by a qualified machinist or toolroom technician using a standard ER40 collet chuck and matching chuck nut. Before installing or changing collets, ensure the spindle is fully stopped and the machine is in a safe, locked-out state per your facility lockout/tagout procedure. Insert the collet into the chuck nut before threading onto the chuck body, and torque the nut using an appropriate ER spanner wrench. Inspect the collet seating surface and chuck bore for chips or damage before each use to maintain runout accuracy.