The AirTAC Airtac SCD Standard Cylinder SCD63X50H 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, 50mm stroke, PT1/4 ports and adjustable end cushioning.
The SCD63X50H brings balanced double-rod actuation to high-temperature environments, using Viton (FKM) seals rated for continuous operation from 0 to +150 °C. With a 63 mm bore and 50 mm stroke, it outputs an identical 1402 N of force in both directions at 0.5 MPa, making it a reliable pick for hot-work tooling that needs symmetric thrust.
Both ends of the Ø20 mm through-rod are threaded M16×1.5, so you can mount tooling, stripper plates, or external stroke flags on the rear rod. The body length A(SCD) is 210 mm, and the adjustable air cushion (28 mm) decelerates the piston smoothly at each end, protecting the end caps during high-cycle hot processes.
| Model | Airtac SCD Standard Cylinder SCD63X50H |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø63 mm |
| Rod diameter | Ø20 mm (both ends) |
| Stroke | 50 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. |
| ×50 | 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.
Viton seals let this cylinder operate directly beside heated platens or in drying ovens up to 150 °C, where standard seals would degrade. The equal push-pull force simplifies clamp-and-release sequences.
With a rod protruding from both ends, one side can push the finished part while the rear rod actuates a secondary stripper or confirmation switch, all in a single compact stroke.
The identical force in both directions is ideal for applying balanced tension to webs, belts, or cables during thermal processing, where force consistency matters more than raw power.
This 63 mm bore double-rod actuator is a natural fit when you need equal push-pull force and can tolerate elevated ambient temperatures. If your load demands more thrust, stepping up to the SCD80 bore provides 2268 N at the same 0.5 MPa. For applications that only require a single working direction, a single-rod SC63 cylinder may be a simpler choice, but you lose the rear rod access and the perfectly balanced force profile.
When replacing an existing SCD63X50H, match the bore, 50 mm stroke, PT port thread, basic mounting, and the -H Viton seal suffix. The double-rod design offers better guidance than a single-rod cylinder, but for a 50 mm stroke side loads are rarely a concern; if your tooling imposes a significant bending moment, consider adding an external linear guide rather than relying solely on the rod bearings.
Double-rod checklist
Because it is a double-rod cylinder, the effective piston area is the same on both sides. At 0.5 MPa it delivers 1402 N in each direction, rising to 2523 N at 0.9 MPa. The theoretical maximum at 1.0 MPa is 286 kgf.
No. Like any standard pneumatic cylinder, the SCD63X50H will drift or drop if supply air is cut or the valve is centred. The adjustable air cushion only decelerates the piston near stroke end; it does not lock the rod. For load holding without live pressure, you must add an external rod lock or a pilot-operated check valve.
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