The AirTAC Airtac SCD Standard Cylinder SCD40X150S is a genuine double-acting DOUBLE-ROD air cylinder: the Ø16mm piston rod extends from BOTH end caps, giving equal effective area — and therefore equal force — in push and pull. Ø40mm bore, 150mm stroke, PT1/4 ports and adjustable end cushioning.
The SCD40X150S is a double-acting, double-rod pneumatic cylinder delivering perfectly symmetrical force in both directions—528 N at 0.5 MPa, rising to 950 N at the maximum operating pressure of 0.9 MPa. Because the 16 mm diameter piston rod extends from both end caps, the effective pressure area is identical on the push and pull strokes, making this actuator ideal for applications where balanced speed and thrust are critical.
This model includes a factory-fitted magnet (-S suffix) inside the piston, allowing you to mount CMSG, DMSG, or EMSG reed and solid-state sensors directly onto the tie-rod barrel for non-contact end-of-stroke detection. With a 150 mm stroke, adjustable air cushioning (21 mm length), and PT1/4 ports, it provides smooth deceleration and is built for a standard operating pressure range of 0.15–1.0 MPa.
| Model | Airtac SCD Standard Cylinder SCD40X150S |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø40 mm |
| Rod diameter | Ø16 mm (both ends) |
| Stroke | 150 mm |
| Rod configuration | Double rod — rod through both caps |
| Acting type | Double acting |
| Port size | PT1/4 |
| Rod thread | M12×1.25 |
| 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 | 528 N | 528 N |
| 0.7 MPa | 739 N | 739 N |
| Max (@1.0 MPa) | 108 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). |
|---|---|
| 40 | 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.
Mount a tool or stripper plate on the rear rod while the front rod performs the main pressing or clamping operation, using the equal 528 N force in both directions for synchronized motion.
Utilize the built-in magnet and the protruding rear rod to attach a sensor flag or cam for end-of-stroke detection when the front end is inaccessible, simplifying machine logic.
Power a shuttle or diverter gate on a conveyor line where the cylinder must push and pull an identical load with the same speed and force, ensuring consistent product handling.
Step up to the SCD50 bore if your application demands more than the 528 N of balanced force this 40 mm unit provides at 0.5 MPa (the SCD50 delivers 825 N). If you only need force from one end of the piston, a standard single-rod SC series cylinder will be more compact and cost-effective. For direct replacement, match the 40 mm bore, 150 mm stroke, PT1/4 port thread, basic mounting, and the integrated magnet feature.
At a 150 mm stroke, the through-rod design provides better bearing support than a single-rod cylinder, but if your tooling applies a significant side load, an external guide rail or a dedicated guided cylinder is still required to prevent premature rod bearing wear and ensure long service life.
Double-rod checklist
Because it is a double-rod cylinder, the push and pull forces are equal. At 0.5 MPa it outputs 528 N, at 0.7 MPa it outputs 739 N, and at the maximum operating pressure of 0.9 MPa it delivers 950 N of force in both directions.
Choose the SCD when you need identical force and speed on the extend and retract strokes, or when you need to mount tooling, a mechanical stop, or a sensor target on the rear rod. The through-rod also provides better guidance and resistance to rod deflection than a single-rod cylinder of the same bore.
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