The AirTAC Airtac SCD Standard Cylinder SCD63X350S 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, 350mm stroke, PT1/4 ports and adjustable end cushioning.
The SCD63X350S is a double-acting, double-rod pneumatic cylinder that delivers exactly 1402 N of thrust in both directions at 0.5 MPa because the 20 mm rod passes through both end caps, subtracting the same area from each side. At the maximum operating pressure of 0.9 MPa the output climbs to 2523 N, giving this 63 mm bore cylinder a substantial force envelope for mid-range automation tasks.
With a 350 mm stroke and a body length A(SCD) of 210 mm, this cylinder provides a long, balanced stroke while the through-rod design improves bearing support and naturally resists rotation better than a single-rod unit. The built-in magnet, indicated by the -S suffix, allows CMSG, DMSG, or EMSG sensors to be clamped directly onto the tie-rod barrel for non-contact end-of-stroke or mid-stroke position sensing without extra brackets.
| Model | Airtac SCD Standard Cylinder SCD63X350S |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø63 mm |
| Rod diameter | Ø20 mm (both ends) |
| Stroke | 350 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. |
| ×350 | 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 rod extending from both caps lets you mount a gripper on the front and a counterbalance or secondary tool on the rear, moving both in perfect sync across the 350 mm stroke.
With the built-in magnet, a DMSG sensor on the rear barrel section detects the piston position using the rear rod's motion, keeping the front tooling area clear of sensor hardware.
The dual-rod bearing arrangement resists twisting, making this cylinder suitable for pushing flat panels or sheets where a single-rod cylinder might rotate under load.
Choose the SCD63 bore when your application needs roughly 1400 N of balanced push-pull force at standard plant air. If you can drop to about 825 N, the smaller SCD50 saves space and weight; when you need more than 2268 N at 0.5 MPa, step up to the SCD80. Because this is a 350 mm stroke, be mindful of the long unsupported rod extending from the rear cap—if the rear rod carries a tool or flag that sees any side load, add an external linear guide or consider a guided cylinder instead of relying on the rod bearings alone.
This model replaces any AirTAC SCD63 cylinder with the same 350 mm stroke, PT ports, basic mounting, and the -S magnet option. It is not a dimensional drop-in for ISO 15552 cylinders. For single-direction work where you only need force from one rod end, the single-rod SC63 series is a lighter and more compact alternative.
Double-rod checklist
Push and pull force are identical because the 20 mm rod passes through both sides. At 0.5 MPa you get 1402 N, at 0.7 MPa it is 1962 N, and at the 0.9 MPa maximum operating pressure the force reaches 2523 N in both directions.
Pick the SCD when you need equal force and speed in both directions, want to mount tooling or a sensor flag on the rear rod, or require the better rod guidance and anti-rotation that the through-rod design provides. If you only need force from one end, the single-rod SC63 is simpler and usually costs less.
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