The AirTAC Airtac SCD Standard Cylinder SCD40X200S 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 SCD40X200S is a double-acting, double-rod pneumatic cylinder delivering identical push and pull force of 528 N at 0.5 MPa (950 N at 0.9 MPa), thanks to its 16 mm rod passing through both end caps. This symmetric output makes it ideal for tasks where a tool or sensor flag must be mounted on the rear rod, or where equal speed and force are required in both directions.
This model includes a built-in magnet (-S suffix), allowing easy attachment of CMSG, DMSG, or EMSG reed and solid-state sensors directly onto the tie-rod barrel for precise end-of-stroke detection. With a 200 mm stroke and a compact body length A of 191 mm, it features PT1/4 ports, an M12x1.25 rod thread, and an adjustable air cushion of 21 mm to decelerate the piston smoothly at both ends.
| Model | Airtac SCD Standard Cylinder SCD40X200S |
|---|---|
| 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 protruding rear rod can carry a second tool, stripper plate, or linkage, performing work on both the extend and retract strokes with equal 528 N force.
Ideal for small part transfer units where a sensor flag on the rear rod monitors position without interfering with the main tooling on the front rod.
The dual-rod support naturally resists rod rotation, making it suitable for simple push-and-eject stations where a single rod might twist under load.
For applications needing a bit more force, stepping up to the 50 mm bore SCD50 delivers 825 N at 0.5 MPa. If your task only requires a single working end, the standard single-rod SC40 series is a more economical choice, though you lose the rear rod access and equal force profile. For direct replacement, match bore, stroke, PT port thread, the basic mounting style, and the -S magnet option to ensure drop-in compatibility with an existing AirTAC SCD40 assembly.
With a 200 mm stroke, the through-rod design provides better bearing support than a single-rod cylinder, but it is not a guided unit. If the application imposes significant side loads, consider adding an external linear guide or switching to a dedicated guided cylinder to prevent premature rod bearing wear and bending.
Double-rod checklist
Because it is a double-rod cylinder, the push and pull forces are identical. At 0.5 MPa it outputs 528 N, at 0.7 MPa it outputs 739 N, and at the maximum operating pressure of 0.9 MPa it delivers 950 N in both directions.
Choose the SCD when you need to mount tooling or a sensor target on the rear rod, require perfectly equal force and speed in both directions, or want the improved bearing support and anti-rotation characteristics of a through-rod design.
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