The AirTAC Airtac SCD Standard Cylinder SCD40X200STC 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 SCD40X200STC is a double-acting, double-rod pneumatic cylinder that delivers perfectly symmetrical force in both directions, outputting 528 N at 0.7 MPa. Its 16 mm diameter rod extends from both ends, making it ideal for applications requiring a rear rod for tooling, a stopper, or an external sensor flag. The centre trunnion (TC) mount, supplied with the TCM1 bracket, allows the cylinder to pivot, accommodating swinging or arcing loads.
This specific configuration includes a built-in magnet (-S) for direct mounting of CMSG/DMSG/EMSG sensors, enabling precise, non-contact end-of-stroke detection. With a 200 mm stroke and a body length A of 191 mm, it fits compact dual-action mechanisms. The adjustable air cushion at each end decelerates the piston smoothly, reducing impact noise and vibration for a longer service life in high-cycle applications.
| Model | Airtac SCD Standard Cylinder SCD40X200STC |
|---|---|
| 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 through-rod design allows a tooling plate on each end, enabling a single SCD40X200STC to shuttle parts between two parallel conveyors with equal speed and force in both directions.
With its centre trunnion mount, this cylinder is perfect for swinging gates or clamps. The rear rod can act as a hard stop or mount a cam, while the front rod does the primary work.
The dual-rod support provides inherent anti-rotation, making it suitable for pushing or ejecting parts where rod twist is unacceptable, without needing an external guide for light-duty tasks.
Choose the SCD40 bore when your application needs balanced, equal push-pull force around 528 N at 0.7 MPa. If you require more force, stepping up to the SCD50 bore provides 1154 N at the same pressure. For a simpler setup needing force in only one direction, a single-rod SC cylinder is a lighter and more cost-effective choice. This double-rod design offers better guidance than a single-rod cylinder, but for significant side loads, a dedicated guided cylinder is still required.
To ensure a drop-in replacement, match five key points: 40 mm bore, 200 mm stroke, PT port thread, the TC centre-trunnion mounting style (with F-SC40TC bracket), and the presence of the built-in magnet (-S) for sensor compatibility. This ensures the new unit will fit your existing pivot mechanism and sensor setup without modification.
Double-rod checklist
Because it is a double-rod cylinder, the push and pull forces are identical. At 0.5 MPa, it outputs 345 N; at 0.7 MPa, 528 N; and at its maximum operating pressure of 0.9 MPa, it delivers 950 N. The theoretical force at 1.0 MPa is 108 kgf.
Choose the SCD when you need equal force and speed in both directions, or when you need to mount tooling, a sensor flag, or a mechanical stop on the rear rod. The through-rod also provides better support and inherent anti-rotation for the piston rod compared to a single-rod cylinder.
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