The AirTAC Airtac SCD Standard Cylinder SCD40X160S 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, 160mm stroke, PT1/4 ports and adjustable end cushioning.
The SCD40X160S is a double-acting, double-rod pneumatic cylinder that delivers identical force in both directions—528 N at 0.7 MPa—because the 16 mm rod passes through both end caps. This 40 mm bore model includes a built-in magnet (-S suffix), allowing CMSG, DMSG, or EMSG sensors to clamp directly onto the tie-rod barrel for non-contact position sensing.
With a 160 mm stroke, it is well within the 1200 mm maximum for this bore, and the adjustable air cushion (21 mm length) at each end decelerates the piston smoothly. The body length A(SCD) is 191 mm, making the overall retracted length longer than a comparable single-rod SC cylinder due to the rod protruding from the rear cap.
| Model | Airtac SCD Standard Cylinder SCD40X160S |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø40 mm |
| Rod diameter | Ø16 mm (both ends) |
| Stroke | 160 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. |
| ×160 | 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 lets you mount tooling on both ends, enabling a single cylinder to push a part into a fixture and then pull a finished piece back in the return stroke.
The built-in magnet works with barrel-mounted reed or solid-state sensors to confirm piston position at both ends, a clean solution for sequencing without external flags.
With a rod supported by bearings in both end caps, this cylinder offers better resistance to rotation than a single-rod type, helping keep a pusher plate aligned in light-duty applications.
Choose the SCD40 when you need balanced push-pull force around 528 N at 0.7 MPa and a rear rod extension for mounting a sensor flag, stopper, or secondary tooling. If your load requires more thrust, step up to the SCD50, which provides 1154 N each way at the same pressure. If you only need force from one end, the single-rod SC40 is a simpler, more compact alternative. For direct replacement, match bore, stroke, PT port thread, basic mounting, and the -S magnet; the genuine AirTAC ordering code is SCD40X160S.
Double-rod checklist
Push and pull force are equal because the rod extends from both ends. At 0.5 MPa it produces 345 N, at 0.7 MPa it is 483 N, and at the maximum operating pressure of 0.9 MPa it reaches 621 N. The theoretical force at 1.0 MPa is 70 kgf.
Pick the SCD40 when you need identical force and speed in both directions, or when you require a rear rod extension to mount a sensor target, mechanical stop, or secondary tool. The dual-bearing support also provides better guidance against rod deflection than a single-rod cylinder.
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