Confirm the exact configuration
Use the manufacturer part number and model code—not appearance alone. Connection, size, material, voltage, pressure, seal, and control options can differ within the same product family.

SMC
The SMC 21-CG1 is an official catalog model of the CG1 Round Body Repairable Actuator configured as a Clean Series 21 relief type with copper, fluorine, and silicon-free construction plus low particle generation. It features selectable bore sizes ranging from 20mm to 100mm, stroke lengths from 25mm to 300mm, rubber bumper or air cushion options, and multiple mounting styles including basic, front flange, head side flange, and axial foot. Available configurations support optional built-in magnets, male or female rod ends, and various solid-state or reed auto switch types with customizable lead wire lengths. Submit the exact part number, quantity, and application requirements to request a quote for this SMC actuator.
Industrial and obsolete parts are priced per enquiry: the final price depends on available stock, condition, quantity, and your delivery destination, so a fixed list price would be misleading. Request a quote and we confirm current pricing, lead time, and sourcing options — including hard-to-find and discontinued SMC references — within one business day.
For a faster response, include quantity, condition, and delivery destination.
Verified configuration
Engineering context
Use the manufacturer part number and model code—not appearance alone. Connection, size, material, voltage, pressure, seal, and control options can differ within the same product family.
Provide quantity, delivery country and ZIP/postal code, required condition, target date, and photographs of the existing nameplate when available.
Our sourcing response is prepared against SMC 21-CG1. Final compatibility remains subject to the machine manufacturer’s requirements and complete application data.