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-CJ2RA is an official catalog model from the CJ2 Small Bore Actuator series featuring a relief type configuration that is copper, fluorine, and silicon-free with low particle generation. This unit is available in 10mm and 16mm bore sizes with stroke options ranging from 15mm to 200mm, alongside selectable head cover port locations including perpendicular to the axis or axial direction. Configurations can be specified with or without a built-in magnet, band-mounted auto switches such as solid-state or reed variants, and specific lead wire lengths and quantities. Submit the exact part number, quantity, and application requirements to receive a formal quotation.
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-CJ2RA. Final compatibility remains subject to the machine manufacturer’s requirements and complete application data.