Parlec ER40-0875 ER40 Collet 7/8 Inch

Product Description

The PARLEC ER40-0875 is an ER40 series collet with a nominal clamping size of 0.875 inches (7/8 inch) and a minimum collet capacity of 0.836 inches, giving it a working range suited to common shank diameters in that size class. Overall length is 1.811 inches. The collet fits into any standard ER40 collet chuck and is used to grip cutting tools or workpiece stock during milling, drilling, tapping, and turning operations. Machinists, toolroom technicians, and CNC setup operators are the primary users. The part weighs 0.5 pounds.

ER40-series collets are a widely used toolholding standard across CNC machining centers, manual milling machines, lathes with collet attachments, and dedicated collet chuck setups. The ER40-0875 is suited for gripping 7/8-inch shank end mills, drills, reamers, taps, and similar round-shank tooling. It is appropriate for both production and jobshop environments where accurate, repeatable tool runout is required. The collet is installed into an ER40-compatible chuck body and drawn in with the matching ER40 locknut.

Key Features

• ER40 collet series - fits any standard ER40 chuck body and locknut
• Nominal collet size of 0.875 inches (7/8 inch) with a minimum capacity of 0.836 inches
• Overall length of 1.811 inches for compact toolholding envelope
• Single-piece collet construction for consistent clamping force distribution
• Lightweight at 0.5 pounds, minimizing added mass in the spindle

Compatibility

Designed as a direct-fit replacement or addition for any ER40-standard collet chuck accepting the ER40 collet series at a 0.875-inch nominal size.

Installation Notes

ER40 collets are installed by a machinist or toolroom technician. Before changing collets, power down the machine spindle completely and confirm it has come to a full stop. Insert the collet into the ER40 locknut before seating it in the chuck taper, then thread and torque the locknut using an appropriate ER40 spanner wrench to the chuck manufacturer's specification. Inspect the collet seating surface and taper bore for chips or damage before each installation to maintain runout accuracy.