The AirTAC Airtac SCD Standard Cylinder SCD50X350 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, 350mm stroke, PT1/4 ports and adjustable end cushioning.
The SCD50X350 is a tie-rod double-rod cylinder that produces an identical 825 N of thrust in both extend and retract at 0.5 MPa, thanks to its through-rod design. With a 350 mm stroke and a 20 mm rod projecting from both end caps, it is purpose-built for tasks where a rear connection point for tooling, a sensor flag, or a mechanical stop is needed.
At 0.9 MPa the output rises to 1484 N, and the adjustable air cushion on each end (21 mm length) decelerates the piston smoothly. The body length A(SCD) is 207 mm, and the PT1/4 ports keep it compatible with standard pneumatic plumbing. This model uses the default TPU seal and PT threads, suiting general industrial environments from -20 to +70 °C.
| Model | Airtac SCD Standard Cylinder SCD50X350 |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø50 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, 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. |
| ×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 ends allows a single SCD50X350 to operate two mechanisms in sequence, such as opening and closing a pair of linked gates or diverters on a conveyor line, with equal 825 N force on each side.
The dual-rod support provides inherent anti-rotation, making the SCD50X350 a reliable choice for pushing components into a press or fixture where any twist of the tooling would cause a jam or misalignment.
Mount a positive stop on the rear rod to set a precise mechanical end-point for a transfer shuttle. The front rod can simultaneously carry the shuttle itself, all driven by the cylinder's equal 1484 N thrust at 0.9 MPa.
This 50 mm bore double-rod cylinder is a balanced choice for symmetric push-pull tasks. If you need more force, the SCD63 delivers 1402 N at 0.5 MPa; for a lighter, more compact setup, the SCD40 provides 528 N. Because the rod extends from both sides, the SCD offers better guidance than a single-rod SC, but it is not a guided cylinder—if the 350 mm stroke exposes the rod to side loads, add an external linear guide or switch to a guided cylinder to prevent rod bending.
For a direct replacement, match the 50 mm bore, 350 mm stroke, PT1/4 port thread, basic mounting style, and the absence of a magnet. If your previous cylinder used a magnetic piston for sensors, specify the -S suffix on the new SCD50X350S to accept CMSG/DMSG switches.
Double-rod checklist
Because it is a double-rod cylinder, the push and pull forces are equal. At 0.5 MPa it produces 825 N, at 0.7 MPa it delivers 1154 N, and at the maximum operating pressure of 0.9 MPa the force is 1484 N in both directions.
Choose the SCD when you need identical force and speed in both directions, a rear rod extension to mount sensors or tooling, or better resistance to rod deflection. The through-rod design balances the bearing loads, but for applications with high side forces, a dedicated guided cylinder is still the correct solution.
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