The AirTAC Airtac SCD Standard Cylinder SCD40X225S 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, 225mm stroke, PT1/4 ports and adjustable end cushioning.
The AirTAC SCD40X225S is a double-acting, double-rod pneumatic cylinder that provides exactly 528 N of thrust in both directions at 0.5 MPa, thanks to its balanced design where the 16 mm rod passes through both end caps. This symmetry eliminates force differential, making it ideal for applications requiring consistent speed and power for both extend and retract strokes.
With a 225 mm stroke and a body length A of 191 mm, this cylinder is compact yet capable. The built-in magnet (denoted by the -S suffix) allows direct mounting of CMSG, DMSG, or EMSG reed and solid-state sensors on the tie-rod barrel for precise, contactless end-of-stroke or mid-stroke position feedback without additional brackets.
| Model | Airtac SCD Standard Cylinder SCD40X225S |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø40 mm |
| Rod diameter | Ø16 mm (both ends) |
| Stroke | 225 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. |
| ×225 | 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.
Operates tools or clamps from both ends of the cylinder simultaneously, using the front rod for the primary task and the rear rod for a secondary function like ejecting a part or triggering a limit switch.
The dual-rod configuration provides inherent anti-rotation stability for simple push/pull applications, keeping a mounted plate or pusher bar aligned without needing a complex external guide system.
Moves a workpiece carrier between two conveyor lanes. The front rod connects to the shuttle, while the rear rod extension can mount a sensor flag, allowing the built-in magnet to signal position directly to a DMSG sensor.
Select the SCD40 when your application needs equal bidirectional force around 528 N at 0.5 MPa. If you require more force, stepping up to the SCD50 provides 825 N at the same pressure. For tasks needing only a single working end, the standard single-rod SC series is a lighter and more cost-effective choice. This SCD40X225S is a direct replacement for any AirTAC SCD40 double-rod cylinder of the same 225 mm stroke, PT port thread, and magnetic piston configuration.
At a 225 mm stroke, the through-rod design offers better guidance than a single-rod cylinder, but it is not a substitute for a fully guided unit. If your load applies significant side force, consider adding an external linear guide or selecting a guided cylinder to prevent premature rod bearing and seal wear.
Double-rod checklist
Because it is a double-rod cylinder, the push and pull forces are identical. The effective piston area is the same in both directions. 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 produces 950 N.
Choose the SCD when you need equal force and speed in both directions, or when you require a rear rod extension for mounting a second tool, a mechanical stop, or a sensor flag. The through-rod also provides better support for the piston, reducing uneven bearing wear in applications with very frequent cycling.
Genuine AirTAC parts produced by AirTAC factory.
Covers non-human-caused product damage.
Standard models usually ship in 3-4 days.
Most inquiries answered within 7-8 hours.
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.