The AirTAC Airtac SCD Standard Cylinder SCD50X220S is a genuine double-acting DOUBLE-ROD air cylinder: the Ø20mm piston rod extends from BOTH end caps, giving equal effective area — and therefore equal force — in push and pull. Ø50mm bore, 220mm stroke, PT1/4 ports and adjustable end cushioning.
The SCD50X220S delivers balanced, identical force in both directions—825 N at 0.5 MPa—because the 20 mm rod passes through both end caps, subtracting the same area on each side. This 220 mm stroke model stays within the standard range for the 50 mm bore and includes a factory-installed magnet, so CMSG/DMSG/EMSG sensors clip directly onto the tie-rod barrel for reliable end-of-stroke detection.
With a body length A of 207 mm and a 21 mm adjustable air cushion at each end, the cylinder decelerates the piston smoothly without metal-to-metal impact. The dual rod ends let you mount tooling or a stroke-adjustment stop on the rear side while the front side drives the main load, making it a practical choice for two-sided assembly fixtures and transfer mechanisms.
| Model | Airtac SCD Standard Cylinder SCD50X220S |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø50 mm |
| Rod diameter | Ø20 mm (both ends) |
| Stroke | 220 mm |
| Rod configuration | Double rod — rod through both caps |
| Acting type | Double acting |
| Port size | PT1/4 |
| Rod thread | M16×1.5 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 800 mm/s |
| Cushion | Adjustable, 21 mm |
| Max stroke | Up to 1200 mm |
Specifications follow the official AirTAC SCD (double-rod) datasheet. Because the rod runs through both caps, the effective area is (bore² − rod²) in both directions. Confirm against the product label before installation. Thread options: PT (standard) / G.
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 825 N | 825 N |
| 0.7 MPa | 1155 N | 1155 N |
| Max (@1.0 MPa) | 168 kgf | |
Push and pull are EQUAL on a double-rod cylinder — both chambers lose the rod area, so effective area = (bore² − rod²) each way. Actual usable force is lower than theoretical due to friction and back-pressure; size with a safety margin.
| SCD | Double-rod tie-rod cylinder series (rod out both ends). |
|---|---|
| 50 | Bore size in mm. |
| ×220 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Related types: SC (single rod), SCJ (adjustable stroke), SCT (multi-position). SCD mounting: Basic, FA, LB, TC, TCM1. Seals: TPU standard / H = Viton / N = NBR. Thread: blank = PT, G = G thread.
The rod extending from both ends lets one cylinder drive two opposing clamps or stops simultaneously with perfectly synchronized motion and equal force.
With the built-in -S magnet, mount a CMSG reed switch on the rear end cap to confirm retracted position without interfering with the front tooling.
Use the rear rod to carry a counterbalance or a secondary pusher in a reciprocating shuttle, keeping the load symmetric and the cycle time consistent.
Choose the SCD50 when 825 N of balanced thrust at 0.5 MPa fits your load. If you need more force, the SCD63 provides 1402 N at the same pressure; for a lighter, more compact drive, the SCD40 offers 528 N. Because this is a double-rod cylinder, both ends move together with equal speed and force—if your application only needs force from one end, the single-rod SC50 is a simpler, lower-cost alternative. For a drop-in replacement, match the 50 mm bore, 220 mm stroke, PT port thread, basic mounting, and the -S magnet suffix exactly.
At a 220 mm stroke, the through-rod design gives better bearing support than a single-rod cylinder, but it is not a guided unit. If the rod tips experience any side load, add an external linear guide or switch to a guided cylinder to prevent premature bushing wear and rod bending.
Double-rod checklist
Push and pull force are identical because the rod area is subtracted on both sides. At 0.5 MPa you get 825 N, at 0.7 MPa it is 1154 N, and at the maximum operating pressure of 0.9 MPa the force reaches 1484 N.
Pick the SCD when you need equal force and speed in both directions, or when you want to use the rear rod extension for mounting a sensor flag, a mechanical stop, or secondary tooling. The through-rod also improves bushing support compared to a single-rod cylinder of the same stroke.
Genuine AirTAC parts produced by AirTAC factory.
Covers non-human-caused product damage.
Standard models usually ship in 3-4 days.
Most inquiries answered within 7-8 hours.
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.