The AirTAC Airtac SCD Standard Cylinder SCD200X175S is a genuine double-acting DOUBLE-ROD air cylinder: the Ø40mm piston rod extends from BOTH end caps, giving equal effective area — and therefore equal force — in push and pull. Ø200mm bore, 175mm stroke, PT3/4 ports and adjustable end cushioning.
The SCD200X175S is a heavy-duty double-rod pneumatic cylinder that delivers identical push and pull thrust in both directions—15080 N at 0.5 MPa, scaling to 27143 N at the maximum operating pressure of 0.9 MPa. With a 40 mm diameter rod protruding from both end caps and a body length A of 362 mm, this tie-rod actuator is built for large-scale tooling that requires a rear rod extension for mounting cams, flags, or secondary linkages.
This specific model includes a built-in magnet (-S suffix), allowing CMSG, DMSG, or EMSG sensors to be clamped directly onto the barrel for non-contact position sensing. The 175 mm stroke is well within the 1500 mm maximum for the 200 bore, and the adjustable air cushion (33 mm length) at each end decelerates the piston smoothly. The default TPU seal and PT ports suit standard compressed-air environments from -20 to +70 °C.
| Model | Airtac SCD Standard Cylinder SCD200X175S |
|---|---|
| Series | SCD double-rod tie-rod cylinder (ISO 6430 class) |
| Bore size | Ø200 mm |
| Rod diameter | Ø40 mm (both ends) |
| Stroke | 175 mm |
| Rod configuration | Double rod — rod through both caps |
| Acting type | Double acting |
| Port size | PT3/4 |
| Rod thread | M36×2 |
| 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 – 500 mm/s |
| Cushion | Adjustable, 33 mm |
| Max stroke | Up to 1500 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 | 15080 N | 15080 N |
| 0.7 MPa | 21111 N | 21111 N |
| Max (@1.0 MPa) | 3075 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). |
|---|---|
| 200 | Bore size in mm. |
| ×175 | 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 front and rear rods can each drive a clamp or locator pin, synchronizing two work-holding points from a single cylinder body for large weldments or assembly pallets.
With a 40 mm rod on both ends supported by bearings in each cap, the SCD200 resists twisting better than a single-rod cylinder, making it suitable for pushing wide, off-centre loads without adding an external anti-rotation guide.
The rear rod is an ideal mounting point for a sensor flag or trip dog. The built-in magnet on this -S model also enables direct barrel-mounted sensors, giving two independent ways to confirm the shuttle's position.
Choose the SCD200 bore when your application needs approximately 15080 N of balanced force at standard plant pressure. If your load is lighter, stepping down to the SCD160 bore reduces the force to 9425 N at 0.5 MPa, saving air consumption and physical space. For applications that only need force from one side, the single-rod SC200 is a more compact and cost-effective choice. The through-rod design provides better guidance than a single-rod cylinder, but if your 175 mm stroke involves significant side load, an external guide rail or a dedicated guided cylinder is still required to protect the rod bearings.
For a direct replacement, match the 200 mm bore, 175 mm stroke, PT port thread, basic mounting, and the magnet option. The built-in magnet is essential if your existing setup uses barrel-mounted reed or solid-state sensors for end-of-stroke detection.
Double-rod checklist
Because it is a double-rod cylinder, the effective piston area is identical on both sides. The force is 15080 N at 0.5 MPa, 21111 N at 0.7 MPa, and 27143 N at the maximum operating pressure of 0.9 MPa. The theoretical force at 1.0 MPa is 3075 kgf.
Use the SCD when you need equal force and speed in both directions, or when you need to attach tooling, a stopper, or a position sensor to a rear rod. The through-rod also provides better bearing support and inherent anti-rotation compared to a single-rod SC cylinder. If you only need a single working end, the SC200 is a simpler and more economical option.
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