The AirTAC Airtac SCD Standard Cylinder SCD63X180S is a genuine double-acting DOUBLE-ROD air cylinder: the Ø20mm piston rod extends from BOTH end caps, giving equal effective area — and therefore equal force — in push and pull. Ø63mm bore, 180mm stroke, PT1/4 ports and adjustable end cushioning.
The SCD63X180S is a double-acting, double-rod pneumatic cylinder that outputs an identical 1402 N of force in both the extend and retract strokes at 0.5 MPa, thanks to its 20 mm rod passing through both end caps. This symmetry makes it ideal for applications where a tool or sensing flag must be mounted on the rear rod, or where consistent speed is required in both directions.
This 180 mm stroke model includes a built-in magnet (denoted by the -S suffix), allowing easy mounting of CMSG, DMSG, or EMSG reed and solid-state sensors directly onto the tie-rod barrel for precise end-of-stroke or mid-stroke position feedback. With a body length of 210 mm and an adjustable air cushion of 28 mm at each end, it provides reliable deceleration for moving moderate loads.
| Model | Airtac SCD Standard Cylinder SCD63X180S |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø63 mm |
| Rod diameter | Ø20 mm (both ends) |
| Stroke | 180 mm |
| Rod configuration | Double rod — rod through both caps |
| Acting type | Double acting |
| Port size | PT1/4 |
| Rod thread | M16×1.5 |
| 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, 28 mm |
| Max stroke | Up to 1500 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 | 1402 N | 1402 N |
| 0.7 MPa | 1962 N | 1962 N |
| Max (@1.0 MPa) | 286 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). |
|---|---|
| 63 | Bore size in mm. |
| ×180 | 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 1402 N at 0.5 MPa ensures a smooth, symmetrical motion for shuttling parts between two stations without speed or force variation.
The built-in magnet and exposed rear rod allow a DMSG sensor to be mounted on the back of the cylinder to detect piston position, keeping the front tooling area clear.
The dual-rod support provides inherent anti-rotation, making it suitable for pushing components into a fixture without adding an external guide for light-duty alignment tasks.
Choose the SCD63 bore when your application requires a bidirectional force of roughly 1400 N at standard plant pressure. If you need more thrust, the SCD80 delivers 2268 N at the same 0.5 MPa; for a lighter, more compact solution, the SCD50 provides 825 N. This double-rod design is the right choice over a single-rod SC cylinder when you need to attach tooling or a cam to the rear rod, or require better rod guidance to resist slight twisting.
For a drop-in replacement, match the 63 mm bore, 180 mm stroke, PT port thread, basic mounting style, and the -S magnet option of this SCD63X180S. At this stroke length, the through-rod design offers better support than a single rod, but for applications with significant side loads, an external guide rail or a dedicated guided cylinder is still recommended to prevent rod bending.
Double-rod checklist
Because it is a double-rod cylinder, the push and pull forces are identical. The force is 1402 N at 0.5 MPa, 1962 N at 0.7 MPa, and reaches 2523 N at the maximum operating pressure of 0.9 MPa.
You would choose the SCD63X180S when you need a rear rod extension for mounting a sensor flag, a mechanical stop, or secondary tooling. It also provides better guidance and anti-rotation than a single-rod cylinder, and guarantees perfectly equal force and speed in both directions of travel.
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