The AirTAC Airtac SCD Standard Cylinder SCD50X70S 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. Ø50mm bore, 70mm stroke, PT1/4 ports and adjustable end cushioning.
The SCD50X70S is a 50 mm bore double-rod pneumatic cylinder delivering identical push and pull force, rated at 825 N at 0.5 MPa. Its through-rod design, with a 20 mm rod extending from both ends, ensures balanced thrust and consistent speed in each direction, making it ideal for tasks where a rear rod connection is needed for tooling or stroke confirmation.
This model includes a built-in magnet, allowing CMSG, DMSG, or EMSG sensors to be clamped directly onto the tie-rod barrel for non-contact position sensing. With a 70 mm stroke and adjustable air cushion (21 mm length), it provides smooth deceleration. The body length A(SCD) is 207 mm, and the port size is PT1/4.
| Model | Airtac SCD Standard Cylinder SCD50X70S |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø50 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, 21 mm |
| Max stroke | Up to 1200 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 | 825 N | 825 N |
| 0.7 MPa | 1155 N | 1155 N |
| Max (@1.0 MPa) | 168 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). |
|---|---|
| 50 | 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 shuttle table where a tooling plate is mounted on each rod end, moving workpieces between two stations with equal force and speed in both directions.
The dual-rod configuration provides inherent anti-rotation stability for a narrow pusher blade, eliminating the need for an external guide rail in light-duty sorting tasks.
The rear rod extension carries a sensor flag past a CMSG magnetic switch mounted on the barrel, confirming full retraction in a compact space where the front rod end is inaccessible.
Select the SCD50X70S when your application requires equal force in both directions and a rear rod for auxiliary functions. If you need more thrust, the SCD63 bore steps up to 1402 N at 0.5 MPa. For applications needing only a single working end, the standard SC single-rod cylinder is a more economical choice. This double-rod cylinder is not a substitute for a guided unit under significant side load.
To ensure a correct replacement, match the 50 mm bore, 70 mm stroke, PT1/4 port thread, basic mounting, and the built-in magnet feature. The magnet suffix (-S) is essential for retaining sensor compatibility.
Double-rod checklist
The force is identical in both directions because the rod area is subtracted from both sides of the piston. At 0.5 MPa it provides 825 N, at 0.7 MPa it is 1154 N, and at the maximum operating pressure of 0.9 MPa it reaches 1484 N.
Choose the SCD when you need a rear rod connection for mounting a sensor flag, stopper, or secondary tooling, or when you require perfectly equal force and speed in both directions. The through-rod also provides better guidance and bending moment resistance than a single-rod cylinder.
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