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-CDG1RN is an official catalog model of the CG1 round body repairable actuator featuring the 21 clean series designation for copper, fluorine, and silicon-free construction with low particle generation. This component provides configurable bore sizes of 20mm, 25mm, 32mm, 40mm, 50mm, and 63mm, along with stroke lengths ranging from 25mm to 300mm, and supports both male and female rod end port threads. Options include built-in magnets, various auto switch types with multiple lead wire and prewired connector lengths, and quantities ranging from 1 to 4 pieces. Submit the exact part number, quantity, and application requirements to request a quote for this 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-CDG1RN. Final compatibility remains subject to the machine manufacturer’s requirements and complete application data.