The AirTAC Airtac SCD Standard Cylinder SCD50X5 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, 5mm stroke, PT1/4 ports and adjustable end cushioning.
The SCD50X5 is a compact-stroke double-rod air cylinder that delivers identical push and pull thrust from both ends—825 N at 0.5 MPa. Its through-rod design, with a 20 mm diameter rod extending from each cap, is ideal for short-travel two-sided actuation where space is tight and force symmetry matters.
At 5 mm stroke, this model operates well within the 50 mm bore's 1200 mm maximum standard stroke. The body length A(SCD) is 207 mm, and the adjustable air cushion on each end is 21 mm, giving smooth deceleration even in rapid short-cycle applications.
| Model | Airtac SCD Standard Cylinder SCD50X5 |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø50 mm |
| Rod diameter | Ø20 mm (both ends) |
| Stroke | 5 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. |
| ×5 | 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 5 mm stroke and dual rod ends let you eject parts from a fixture in either direction with equal force, simplifying tooling for symmetrical push-off stations.
Use the rear rod as a hard stop or spacer gauge. With 825 N of force at 0.5 MPa, it sets a precise 5 mm gap between components in assembly jigs.
Both rod ends can drive independent clamp arms with exactly the same force and speed, ensuring a workpiece is gripped evenly from two sides without differential motion.
Choose the SCD50X5 when you need a short, balanced push-pull stroke from both ends of the cylinder. If 825 N at 0.5 MPa is insufficient, stepping up to the 63 mm bore (SCD63) increases the equal-both-ways force to 1402 N. For applications requiring force in only one direction, the single-rod SC series is a simpler, more compact alternative. This double-rod unit is not a substitute for a guided cylinder under side load; for any stroke, ensure the load is guided externally if radial forces are present. As a direct replacement, match the 50 mm bore, 5 mm stroke, PT port thread, basic mounting, and absence of a magnet.
Double-rod checklist
Because it is a double-rod cylinder, the push and pull forces are identical. At 0.5 MPa it produces 825 N, at 0.7 MPa it is 1154 N, and at the maximum operating pressure of 0.9 MPa it reaches 1484 N.
You choose an SCD when you need a rod on both ends of the cylinder—for attaching tooling or sensors to the rear, for equal force and speed in both directions, or for the better bearing support a through-rod provides against rod deflection. If you only need force from one end, a single-rod SC cylinder is the correct choice.
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