The AirTAC Airtac SCD Standard Cylinder SCD63X70 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, 70mm stroke, PT1/4 ports and adjustable end cushioning.
The SCD63X70 is a double-acting pneumatic cylinder with a through-rod design, giving you identical push and pull force in both directions—1402 N at 0.5 MPa. The 20 mm diameter rod extends from both ends, making it ideal for short-stroke, two-sided tooling or applications where you need to mount a sensor flag or stopper on the rear rod.
With a 70 mm stroke and a body length A(SCD) of 210 mm, this 63 mm bore cylinder fits compact spaces while providing up to 2523 N of thrust at the maximum operating pressure of 0.9 MPa. It features an adjustable air cushion (28 mm length) for smooth deceleration and PT1/4 ports as standard.
| Model | Airtac SCD Standard Cylinder SCD63X70 |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø63 mm |
| Rod diameter | Ø20 mm (both ends) |
| Stroke | 70 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. |
| ×70 | 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.
Operates a transfer shuttle that pushes a workpiece from one side and then pulls the empty carrier back with equal force, using the rear rod for a counterbalance or guide.
The rear rod extension provides a clean mounting point for a sensor flag or cam, allowing end-of-stroke detection without interfering with the primary tooling on the front rod.
Dual rod extensions improve resistance to rotation, making this cylinder suitable for a short-stroke pusher in a labeling or stamping fixture where rod twist must be minimized.
Choose the SCD63X70 when your application needs balanced bidirectional force in a compact envelope. If you require higher thrust, the SCD80 bore steps up to 2268 N at 0.5 MPa, while the SCD50 offers 825 N for lighter duties. This double-rod unit is the right choice over a single-rod SC when you need to attach tooling or sensors to both ends, but remember it is not a guided cylinder—for significant side loads, add an external guide rail.
For a direct replacement, match the 63 mm bore, 70 mm stroke, PT port thread, basic mounting style, and the absence of a magnet. Using a genuine AirTAC SCD ensures the same tie-rod dimensions and cushion performance.
Double-rod checklist
Because it is a double-rod cylinder, the push and pull forces are identical. At 0.5 MPa it outputs 1402 N, at 0.7 MPa it is 1962 N, and at the maximum operating pressure of 0.9 MPa it reaches 2523 N.
Select the SCD when you need equal force and speed in both directions, or when you require a rear rod extension for mounting sensors, stoppers, or secondary tooling. The through-rod also provides better guidance and anti-rotation than a single-rod cylinder of the same bore.
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