The AirTAC Airtac SCD Standard Cylinder SCD63X300 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, 300mm stroke, PT1/4 ports and adjustable end cushioning.
The SCD63X300 is a double-acting, double-rod pneumatic cylinder that delivers identical push and pull force in both directions, rated at 1402 N at 0.5 MPa and reaching 2523 N at the maximum operating pressure of 0.9 MPa. With a 20 mm rod passing through both end caps, it provides a symmetrical output and better bearing support than a single-rod cylinder, making it ideal for applications where you need to mount tooling or sensors on both ends of the piston rod.
This 63 mm bore model has a 300 mm stroke, well within the 1500 mm maximum standard stroke for this bore size. The adjustable air cushion at each end is 28 mm long, effectively decelerating the piston near the end of travel. The body length A(SCD) is 210 mm, and the overall retracted length is longer than a comparable single-rod SC cylinder due to the rod extending from the rear cap.
| Model | Airtac SCD Standard Cylinder SCD63X300 |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø63 mm |
| Rod diameter | Ø20 mm (both ends) |
| Stroke | 300 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. |
| ×300 | 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 a shuttle table or transfer mechanism where a tooling plate is mounted on each rod end, moving parts between two parallel conveyor lines with equal force in both strokes.
The dual-rod design provides inherent anti-rotation for a pusher plate, eliminating the need for an external guide in light-duty sorting or rejecting applications.
The rear rod extension carries a cam or sensor flag, allowing a CMSG or DMSG reed switch to be mounted on the back of the cylinder for end-of-stroke confirmation in a tight envelope.
Choose the SCD63X300 when your application requires equal thrust and speed in both directions, or when you need a rear rod extension for a limit switch flag, a manual override, or dual-sided tooling. If 1402 N at 0.5 MPa is insufficient, stepping up to an SCD80 bore provides 2268 N at the same pressure. If you only need force in one direction and a rear rod is unnecessary, the single-rod SC63 series is a simpler, more compact alternative.
For a stroke of 300 mm, be mindful of side loads on the unsupported rod ends. While the through-rod design offers better guidance than a single rod, it is not a guided cylinder. For applications with significant lateral force, an external guide rail or a guided cylinder should be used. This SCD63X300 is a direct replacement for another AirTAC SCD63X300 with matching PT ports, basic mounting, and no magnet.
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 2523 N at the maximum operating pressure of 0.9 MPa.
Choose the SCD63 when you need perfectly equal force and speed in both directions, or when you require a rear rod extension to mount a sensor flag, a manual stop, or secondary tooling. The through-rod also provides better guidance and anti-rotation than a single-rod cylinder.
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