The AirTAC Airtac SCD Standard Cylinder SCD40X36 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, 36mm stroke, PT1/4 ports and adjustable end cushioning.
The SCD40X36 is a double-acting, double-rod pneumatic cylinder built on a 40 mm bore with a 36 mm stroke. Its defining characteristic is the piston rod that extends from both ends, giving it an identical effective pressure area in both directions. At a common 0.7 MPa supply, this model outputs a balanced 528 N of force whether extending or retracting, making it ideal for tasks where symmetric thrust is non-negotiable.
Both rods share the same 16 mm diameter and M12x1.25 thread, providing a sturdy attachment point on each side of the cylinder. The body length A(SCD) is 191 mm, and the integrated air cushion is 21 mm long, adjustable to decelerate the piston smoothly at either end of its travel. With PT1/4 ports, it fits standard pneumatic plumbing and operates reliably between -20 and +70 °C with its default TPU seals.
| Model | Airtac SCD Standard Cylinder SCD40X36 |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø40 mm |
| Rod diameter | Ø16 mm (both ends) |
| Stroke | 36 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. |
| ×36 | 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 lets you mount tooling on both ends, perfect for a reciprocating shuttle that needs to push a part into a fixture on one stroke and pull a finished piece out on the return, all with equal force.
Use the rear rod to actuate a secondary clamp or a limit switch flag in perfect mechanical synchronization with the main tooling on the front rod, eliminating timing drift between two separate cylinders.
The dual-rod support provides inherent anti-rotation for light pushing and sorting tasks. Mount a flat pusher plate on the front rod and use the rear rod for a simple external guide to keep the plate aligned without a complex rail system.
Choose the SCD40X36 when your mechanism needs a synchronized push-pull action or a rear rod for mounting a sensor flag or secondary tooling. If you need more force, the SCD50 bore steps up to 825 N at 0.5 MPa. For applications where only one rod end is needed, the single-rod SC series is a simpler, more compact alternative. This double-rod design provides better guidance than a single-rod cylinder, but it is not a substitute for a proper guided cylinder if the load applies significant side force.
To ensure a correct replacement, match five points: the 40 mm bore, the 36 mm stroke, the PT1/4 port thread, the basic mounting style, and the absence of a magnet. This is a non-standard stroke, confirming it was a made-to-order configuration for a specific machine requirement.
Double-rod checklist
Because it is a double-rod cylinder, the push and pull forces are identical. At 0.5 MPa it produces 528 N, at 0.7 MPa it produces 739 N, and at the maximum operating pressure of 0.9 MPa it delivers 950 N of force in both directions.
You would choose the SCD when you need equal force and speed in both directions, or when you need to attach tooling or sensors to the rear rod. The through-rod design also provides better bearing support for the piston rod, which helps reduce deflection under light side loads compared to a single-rod cylinder of the same size.
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