The AirTAC Airtac SCD Standard Cylinder SCD40X370S 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, 370mm stroke, PT1/4 ports and adjustable end cushioning.
The SCD40X370S is a double-acting, double-rod pneumatic cylinder where the piston rod extends from both ends, guaranteeing identical thrust in both directions. At 0.7 MPa, this 40 mm bore unit provides a balanced 528 N of force for push and pull strokes, making it ideal for applications demanding symmetrical motion. The 370 mm stroke is well within the 1200 mm maximum for this bore, and the 16 mm diameter through-rod offers enhanced guidance compared to a single-rod design.
This specific model includes a built-in magnet, allowing easy mounting of CMSG, DMSG, or EMSG sensors directly onto the tie-rod barrel for precise, non-contact end-of-stroke detection. The body length A(SCD) is 191 mm, and the adjustable pneumatic cushioning at both ends, with a 21 mm cushion length, decelerates the piston smoothly to reduce impact energy. It operates on 40 µm filtered air within a standard pressure range of 0.15 to 1.0 MPa.
| Model | Airtac SCD Standard Cylinder SCD40X370S |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø40 mm |
| Rod diameter | Ø16 mm (both ends) |
| Stroke | 370 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. |
| ×370 | 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 equal 528 N force in both directions makes this cylinder perfect for shuttling parts between two stations, where a tooling plate can be mounted on each rod end for balanced, high-speed transfer.
With the integrated -S magnet, CMSG sensors can be clamped directly to the body to provide precise position feedback for a rear rod acting as a mechanical stop or gate flag, simplifying control architecture.
The dual-rod support from the 16 mm through-rod inherently resists rotation, making this cylinder suitable for push/pull alignment fixtures where a single rod would allow the tooling to twist under load.
Select the SCD40X370S when your mechanism requires equal force and speed in both directions from a compact 40 mm bore. If the 528 N force at 0.7 MPa is insufficient, stepping up to an SCD50 (1154 N at 0.7 MPa) is the logical next move. For applications needing only a single rod end, the standard SC series is a more economical choice, and if significant side loads are present, a guided cylinder should be used instead of relying solely on the double-rod's improved bearing support. This SCD replaces any previous AirTAC double-rod cylinder matching the 40 mm bore, 370 mm stroke, PT port thread, basic mounting, and the -S magnet option.
Double-rod checklist
Because it is a double-rod cylinder, the push and pull forces are identical. The effective piston area is the same on both sides. At 0.5 MPa it produces 345 N, at 0.7 MPa it produces 483 N, and at the maximum operating pressure of 0.9 MPa, the force is 621 N.
You would choose the SCD when you need a rear rod end for mounting a sensor cam, a secondary tool, or a manual adjustment knob. It also provides better guidance and anti-rotation properties than a single-rod SC, and guarantees perfectly symmetrical force and speed for both the extend and retract strokes.
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