The AirTAC Airtac SCD Standard Cylinder SCD100X50S is a genuine double-acting DOUBLE-ROD air cylinder: the Ø25mm piston rod extends from BOTH end caps, giving equal effective area — and therefore equal force — in push and pull. Ø100mm bore, 50mm stroke, PT1/2 ports and adjustable end cushioning.
The SCD100X50S is a double-acting, double-rod pneumatic cylinder that provides perfectly symmetrical force output in both directions. With a 100 mm bore and 25 mm through-rod, it generates an identical 3681 N of thrust on the push and pull strokes when supplied with 0.5 MPa air pressure, rising to 6626 N at the maximum operating pressure of 0.9 MPa.
This 50 mm stroke model features a built-in magnet (-S suffix) along its tie-rod barrel, allowing direct mounting of CMSG, DMSG, or EMSG reed and solid-state sensors for precise, non-contact end-of-stroke detection. The body length (A dimension) is 263 mm, and the adjustable pneumatic cushion at each end is 29 mm long, providing smooth deceleration for the dual rod ends.
| Model | Airtac SCD Standard Cylinder SCD100X50S |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø100 mm |
| Rod diameter | Ø25 mm (both ends) |
| Stroke | 50 mm |
| Rod configuration | Double rod — rod through both caps |
| Acting type | Double acting |
| Port size | PT1/2 |
| Rod thread | M20×1.5 |
| 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, 29 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 | 3682 N | 3682 N |
| 0.7 MPa | 5154 N | 5154 N |
| Max (@1.0 MPa) | 751 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). |
|---|---|
| 100 | 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.
The equal push/pull force of 3681 N at 0.5 MPa makes this cylinder ideal for lateral transfer mechanisms where the load mass and friction are identical in both directions, ensuring consistent cycle times.
With the built-in magnet and a rear rod extension, you can mount CMSG/DMSG sensors on the barrel to confirm full retraction, while using the rear rod tip to trigger an external proximity sensor for a redundant safety check.
The 25 mm rod extending from both ends provides better bearing support than a single-rod cylinder, making it suitable for light alignment and pressing fixtures where rod deflection must be minimized.
Choose the SCD100 bore when your application needs around 3681 N of balanced force at standard plant pressure; if you require significantly less, stepping down to the SCD80 bore provides 2268 N at 0.5 MPa, saving space and air consumption. This double-rod design is the right choice over a single-rod SC cylinder when you need to mount tooling, a mechanical stop, or a sensor flag on the rear rod, or when you require equal speed and force in both directions. For a direct replacement, match the 100 mm bore, 50 mm stroke, PT port thread, basic mounting, and the integrated magnet (-S).
Double-rod checklist
The forces are identical in both directions because the rod area is subtracted from both sides of the piston. At 0.5 MPa, it outputs 3681 N; at 0.7 MPa, 5153 N; and at the maximum operating pressure of 0.9 MPa, it delivers 6626 N.
You select an SCD when the application benefits from having a rod on both ends. This allows you to mount tooling or stops on the rear rod, provides equal force and speed in both stroke directions, and offers improved rod guidance and anti-rotation compared to a single-rod cylinder of the same bore.
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