The AirTAC Airtac SCD Standard Cylinder SCD63X800S is a genuine double-acting DOUBLE-ROD air cylinder: the Ø20mm piston rod extends from BOTH end caps, giving equal effective area — and therefore equal force — in push and pull. Ø63mm bore, 800mm stroke, PT1/4 ports and adjustable end cushioning.
The SCD63X800S is a double-acting, double-rod pneumatic cylinder where the piston rod extends from both ends, guaranteeing identical push and pull force of 1402 N at 0.5 MPa (2523 N at 0.9 MPa). This 63 mm bore unit uses a 20 mm diameter rod on each side and includes a built-in magnet, allowing easy mounting of CMSG/DMSG/EMSG sensors directly on the tie-rod barrel for contactless position feedback.
With an 800 mm stroke and a body length A of 210 mm, this cylinder is well-suited for long-transfer applications like shuttle tables where a rear rod can carry a secondary tool or a sensor flag. The adjustable air cushion (28 mm) at both ends decelerates the piston smoothly, protecting end caps during high-cycle operation at speeds up to 800 mm/s.
| Model | Airtac SCD Standard Cylinder SCD63X800S |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø63 mm |
| Rod diameter | Ø20 mm (both ends) |
| Stroke | 800 mm |
| Rod configuration | Double rod — rod through both caps |
| Acting type | Double acting |
| Port size | PT1/4 |
| Rod thread | M16×1.5 |
| 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, 28 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 | 1402 N | 1402 N |
| 0.7 MPa | 1962 N | 1962 N |
| Max (@1.0 MPa) | 286 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). |
|---|---|
| 63 | Bore size in mm. |
| ×800 | 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 lets you mount tooling on both ends, perfectly balancing the load. Use the front rod to push a pallet into position while the rear rod simultaneously retracts a stop pin, all with equal force.
The built-in -S magnet enables CMSG/DMSG sensors to be clamped along the 800 mm stroke length. This is ideal for multi-position stopping or verifying full extension and retraction on a long transfer axis.
With 2523 N of force available at 0.9 MPa on both ends, use this cylinder for a two-station pressing operation. The front rod can press a bearing into a housing while the rear rod simultaneously ejects a finished part from a fixture.
Choose the SCD63 bore when your application needs about 1400 N of balanced force in both directions at standard plant pressure. If you need more thrust, stepping up to the SCD80 bore provides 2268 N at the same 0.5 MPa. For strokes of 800 mm, the long unsupported rod on a basic double-rod cylinder can experience bending under side load; if your tooling applies any radial force, consider adding an external linear guide or switching to a dedicated guided cylinder. This SCD63X800S is a direct dimensional replacement only for another AirTAC SCD63 double-rod cylinder matching the 800 mm stroke, PT port, basic mounting, and the -S magnet option.
Double-rod checklist
Because it is a double-rod cylinder, the effective piston area is identical on both sides. The force is 1402 N at 0.5 MPa, 1962 N at 0.7 MPa, and 2523 N at the maximum operating pressure of 0.9 MPa. The theoretical force at 1.0 MPa is 286 kgf.
Choose the SCD when you need perfectly equal force and speed in both directions, or when you require a rear rod extension to mount a sensor flag, a mechanical stop, or secondary tooling. The dual-rod support also provides better inherent guidance against rod rotation compared to a single-rod cylinder, though it is not a replacement for an external guide under heavy side loads.
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