The AirTAC Airtac SCD Standard Cylinder SCD40X100S 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, 100mm stroke, PT1/4 ports and adjustable end cushioning.
The SCD40X100S is a double-acting, double-rod pneumatic cylinder that outputs exactly the same force in both directions—528 N at 0.7 MPa—because its 16 mm rod passes through both end caps. This 40 mm bore model includes a built-in magnet (the -S suffix), letting you clip CMSG or DMSG sensors directly onto the tie-rod barrel for clean, external stroke sensing without extra brackets.
With a 100 mm standard stroke and a compact body length A of 191 mm, the SCD40X100S suits symmetrical push-pull tasks where the rear rod can carry a sensor flag, stopper, or secondary tooling. The PT1/4 ports and adjustable air cushion (21 mm) help manage end-of-stroke deceleration, and the through-rod design naturally resists rotation better than a single-rod cylinder of the same bore.
| Model | Airtac SCD Standard Cylinder SCD40X100S |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø40 mm |
| Rod diameter | Ø16 mm (both ends) |
| Stroke | 100 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. |
| ×100 | 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 push/pull force of 528 N at 0.7 MPa makes the SCD40X100S ideal for shuttling parts between two stations where a tool is mounted on each rod end, keeping cycle times symmetric.
The built-in magnet (-S) allows CMSG/DMSG sensors to mount on the barrel, reading piston position from the rear rod's travel without needing a flag on the front tooling—cleaner for tight automation cells.
With a 16 mm rod guided through both end caps, this cylinder offers better anti-rotation than a single-rod type, useful for light pressing or aligning components where a single rod would twist.
Choose the SCD40 when you need equal bidirectional force around 528 N at standard plant air. If your load requires more thrust, step up to the SCD50, which delivers 1154 N at the same 0.7 MPa. For applications where you only need force in one direction, the single-rod SC40 is lighter and shorter; if the rear rod will see significant side load, a guided cylinder is a safer choice than relying on the double-rod bearings alone. This SCD40X100S is a direct replacement for any AirTAC SCD40X100-S that shares the same PT ports, basic mounting, and magnet option.
Double-rod checklist
Push and pull force are identical on this double-rod cylinder. At 0.5 MPa you get 528 N, at 0.7 MPa it is 739 N, and at the maximum operating pressure of 0.9 MPa it reaches 950 N. Both directions use the annular area (bore minus rod), so there is no force difference between extend and retract.
Pick the SCD40 when you need the piston rod to work on both sides—for instance, to mount a tool on the front and a sensor flag or adjustable stop on the rear. The through-rod also gives better guidance and inherent anti-rotation. If you only need force from one end, the SC40 single-rod cylinder is more compact and costs less.
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