The AirTAC Airtac SCD Standard Cylinder SCD50X150 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, 150mm stroke, PT1/4 ports and adjustable end cushioning.
The AirTAC SCD50X150 is a double-acting, double-rod pneumatic cylinder that provides an identical 825 N of force in both the extend and retract strokes at 0.5 MPa, thanks to its through-rod design. With a 20 mm diameter rod protruding from both ends and a 150 mm stroke, it is ideal for applications requiring balanced motion, such as mounting tooling or a position-sensing flag on the rear rod.
This 50 mm bore model features PT1/4 ports, an M16x1.5 rod thread, and an adjustable air cushion of 21 mm at each end to decelerate the piston smoothly. The body length A(SCD) is 207 mm, making the overall retracted length longer than a comparable single-rod cylinder. It operates on 40-micron filtered air from 0.15 to 1.0 MPa and supports speeds of 30-800 mm/s.
| Model | Airtac SCD Standard Cylinder SCD50X150 |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø50 mm |
| Rod diameter | Ø20 mm (both ends) |
| Stroke | 150 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. |
| ×150 | 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 rear rod can push a second workpiece or return a shuttle on the opposite side of the machine, perfectly synchronizing motion without extra actuators.
The dual-rod support naturally resists rotation, making it suitable for pushing loads where a single-rod cylinder would require an external anti-rotate guide.
Attach a sensor flag or cam to the rear rod extension to trigger external limit switches, keeping the front working area clear for tooling.
Select the SCD50X150 when you need a 50 mm bore with a 150 mm stroke and the unique benefits of a double-rod cylinder: equal force and speed in both directions, and a rear rod extension for dual-sided tasks. If your force requirement is lower, the SCD40 series provides 528 N at 0.5 MPa; for higher force, the SCD63 delivers 1402 N. If you only need a single working end, a standard SC single-rod cylinder is a simpler, more cost-effective choice.
For a direct replacement, match the 50 mm bore, 150 mm stroke, PT port thread, and the specific SCD mounting accessory (e.g., FA, LB, or TC). The SCD is a tie-rod cylinder and is not dimensionally interchangeable with ISO 15552 profiles. If your application involves significant side loads on this 150 mm stroke, consider an external guide rail; the double rod provides better guidance than a single rod but is not a substitute for a fully guided cylinder.
Double-rod checklist
The push and pull forces are identical on a double-rod cylinder. At 0.5 MPa, it provides 825 N; at 0.7 MPa, 1154 N; and at the maximum operating pressure of 0.9 MPa, it delivers 1484 N in both directions.
Choose the SCD when you need to mount tooling, a stopper, or a sensor flag on the rear rod, or when you require perfectly equal force and speed in both directions. The double rod also provides better bearing support and inherent anti-rotation compared to a single-rod cylinder.
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