The AirTAC Airtac SCD Standard Cylinder SCD50X165S 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, 165mm stroke, PT1/4 ports and adjustable end cushioning.
The SCD50X165S is a double-acting, double-rod pneumatic cylinder that outputs an identical 825 N of force in both directions at 0.5 MPa, thanks to its 20 mm rod passing through both end caps. This balanced thrust makes it ideal for applications where the tooling or load must be driven with the same power on the extend and retract strokes, such as symmetrical clamping or two-sided brushing.
With a 165 mm stroke and a compact body length A of 207 mm, this model fits well in mid-stroke transfer tasks. The built-in magnet (denoted by the -S suffix) allows direct mounting of CMSG or DMSG reed switches on the tie-rod barrel for reliable end-of-stroke sensing without extra brackets, simplifying your electrical setup.
| Model | Airtac SCD Standard Cylinder SCD50X165S |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø50 mm |
| Rod diameter | Ø20 mm (both ends) |
| Stroke | 165 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. |
| ×165 | 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 through-rod design provides a rear rod end to mount a second tool, a counter-balance weight, or a stroke confirmation flag, enabling work on both sides of the machine frame simultaneously.
Delivering a consistent 825 N in both extend and retract, this cylinder is perfect for clamping fixtures where the grip force must be identical regardless of the stroke direction.
The dual-rod support offers better resistance to rod rotation than a single-rod cylinder, making it suitable for simple pushing or ejecting tasks where the tooling must not twist.
Choose the SCD50X165S when your mechanism needs equal push and pull force and you want to mount position sensors directly on the cylinder body. If you need more force, stepping up to the SCD63 bore provides 1402 N at the same 0.5 MPa. For applications where the force only matters in one direction, a single-rod SC50 cylinder offers a higher push force (1178 N) because the full bore area is available on the extend stroke.
This is a direct dimensional and performance replacement for another AirTAC SCD50 double-rod cylinder with a 165 mm stroke, PT ports, basic mounting, and a magnet. It is not a drop-in for ISO 15552 cylinders. If your application involves significant side loads, a guided cylinder is a safer choice than relying solely on the dual-rod support.
Double-rod checklist
Because the 20 mm rod occupies area on both sides of the piston, the push and pull forces are identical. At 0.5 MPa you get 825 N, at 0.7 MPa you get 1154 N, and at the maximum operating pressure of 0.9 MPa the force reaches 1484 N in both directions.
Choose the SCD when you need equal force and speed in both directions, or when you require a rear rod extension to mount sensors, cams, or secondary tooling. The dual-rod design also provides better guidance against rod rotation compared to a single-rod cylinder, though it is not a substitute for a fully guided unit under heavy side loads.
Genuine AirTAC parts produced by AirTAC factory.
Covers non-human-caused product damage.
Standard models usually ship in 3-4 days.
Most inquiries answered within 7-8 hours.
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.