The AirTAC Airtac SCD Standard Cylinder SCD40X380 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, 380mm stroke, PT1/4 ports and adjustable end cushioning.
The SCD40X380 is a double-acting pneumatic cylinder with a continuous piston rod that extends from both ends, giving you identical 528 N output force in each direction at 0.5 MPa. Its 16 mm diameter rod runs through both end caps, so the effective pressure area—and therefore thrust and speed—is perfectly balanced for push and pull strokes. With a 380 mm stroke and a body length A of 191 mm, it fits into machinery where you need to mount tooling or a position flag on the rear rod.
This genuine AirTAC SCD cylinder uses a PT1/4 port and an adjustable air cushion (21 mm) to decelerate the piston quietly at each end of travel. Operating on filtered air from 0.15 to 1.0 MPa, it handles temperatures from -20 to +70 °C and reaches speeds up to 800 mm/s. The through-rod construction improves bearing support compared to a single-rod cylinder, helping resist minor side loads and rotation in two-sided actuation tasks.
| Model | Airtac SCD Standard Cylinder SCD40X380 |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø40 mm |
| Rod diameter | Ø16 mm (both ends) |
| Stroke | 380 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. |
| ×380 | 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 rear rod drives a secondary tool or counterbalance, while the front rod moves the main load—both strokes deliver the same 528 N force, keeping motion symmetrical.
With a rod fixed at both ends, the piston body travels along it, naturally resisting rotation. Ideal for pushing components onto a conveyor without twisting.
Attach a sensor flag or cam to the rear rod extension to trigger CMSG/DMSG reed switches mounted on the barrel, enabling end-of-stroke detection without front-rod interference.
Choose the SCD40X380 when your application needs equal force and speed in both directions from a compact 40 mm bore. If you require more thrust, step up to the SCD50 bore, which provides 825 N at 0.5 MPa; for a lighter, faster cycle, the SCD32 delivers 345 N. If you only need a working stroke from one end, the single-rod SC series is a simpler, lower-cost alternative. For true guided motion under side load, pair this cylinder with an external linear guide rather than relying solely on the dual-rod support.
At 380 mm, this is a longer stroke where rod buckling and deflection can become a concern. Ensure the load is aligned axially with the rod, or add an external guide rail to absorb bending moments. When replacing an existing SCD40X380, match the bore, stroke, PT port thread, and any mounting accessory exactly to guarantee drop-in fit and performance.
Double-rod checklist
Push and pull forces are equal on a double-rod cylinder. The SCD40X380 produces 528 N at 0.5 MPa, 739 N at 0.7 MPa, and 950 N at 0.9 MPa in both directions.
Pick the SCD when you need identical force and speed extending and retracting, or when you want to use the rear rod for mounting a sensor target, stopper, or secondary tooling. The through-rod also provides better guidance and anti-rotation than a single-rod design.
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