The AirTAC Airtac SCD Standard Cylinder SCD40X200 is a genuine double-acting DOUBLE-ROD air cylinder: the Ø16mm piston rod extends from BOTH end caps, giving equal effective area — and therefore equal force — in push and pull. Ø40mm bore, 200mm stroke, PT1/4 ports and adjustable end cushioning.
The SCD40X200 is a double-acting pneumatic cylinder with a through-rod that extends from both ends, giving you identical 528 N output in push and pull at 0.5 MPa. Its 16 mm diameter rod runs clean through the 40 mm bore, so the effective piston area is the same on both sides—no force asymmetry to compensate for in your control logic.
With a 200 mm stroke and a retracted body length A of 191 mm, this tie-rod cylinder fits well in mid-reach dual-tooling stations. The PT1/4 ports and adjustable air cushion (21 mm length) let you dial in smooth deceleration at both ends of travel, while the standard TPU seals handle -20 to +70 °C.
| Model | Airtac SCD Standard Cylinder SCD40X200 |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø40 mm |
| Rod diameter | Ø16 mm (both ends) |
| Stroke | 200 mm |
| Rod configuration | Double rod — rod through both caps |
| Acting type | Double acting |
| Port size | PT1/4 |
| Rod thread | M12×1.25 |
| 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 | 528 N | 528 N |
| 0.7 MPa | 739 N | 739 N |
| Max (@1.0 MPa) | 108 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). |
|---|---|
| 40 | Bore size in mm. |
| ×200 | 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 equal 528 N force in both directions makes this cylinder ideal for small part shuttles where the load and speed profile must be identical on the forward and return stroke.
The rear rod extension provides a convenient mounting point for a sensor flag or trip dog, keeping the front tooling area clear while enabling end-of-stroke detection without adding brackets to the load.
The dual-rod support improves resistance to rotation compared to a single-rod cylinder, useful for light pressing or alignment fixtures where twisting the tooling would cause misalignment.
Choose the SCD40X200 when you need a compact double-rod actuator with balanced bidirectional force. If 528 N at 0.5 MPa is slightly low, stepping up to the 50 mm bore SCD50 series provides 825 N each way. For applications that only need force from one end, the single-rod SC40 cylinder offers a higher push force (628 N at 0.5 MPa) because the full bore area is used on the extend stroke. To replace an existing SCD40X200, match the 40 mm bore, 200 mm stroke, PT port thread, and any mounting accessory; the basic configuration here uses no magnet or brackets.
Double-rod checklist
Because the piston rod passes through both end caps, the push and pull forces are identical. At 0.5 MPa you get 528 N, at 0.7 MPa it is 739 N, and at the maximum operating pressure of 0.9 MPa the output is 950 N in both directions.
Pick the SCD40 when you need symmetric force and speed in both directions, or when you want to mount tooling, a stopper, or a sensor target on the rear rod. The through-rod also gives better guidance than a single rod, though it is not a replacement for a fully guided cylinder under high side loads.
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