The AirTAC Airtac SCD Standard Cylinder SCD63X40S 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, 40mm stroke, PT1/4 ports and adjustable end cushioning.
The SCD63X40S delivers balanced bidirectional force of 1402 N at 0.5 MPa, making it a precise choice for short-stroke tasks where the work must be identical in both directions. Its through-rod design subtracts the 20 mm rod area from both piston sides, so push and pull thrust are always equal.
This 63 mm bore double-rod cylinder includes a built-in magnet, allowing CMSG, DMSG, or EMSG sensors to clamp directly onto the tie-rod barrel for reliable end-of-stroke detection. With a 28 mm air cushion at each end and a compact body length A of 210 mm, it handles frequent cycling quietly and is rated for speeds from 30 to 800 mm/s.
| Model | Airtac SCD Standard Cylinder SCD63X40S |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø63 mm |
| Rod diameter | Ø20 mm (both ends) |
| Stroke | 40 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. |
| ×40 | 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 force in both directions makes this cylinder ideal for symmetrical clamping fixtures where the grip pressure must be identical whether the jaws open or close.
The integrated magnet and 40 mm stroke suit compact pick-and-place heads where a rear-mounted DMSG sensor confirms retraction without adding external flag hardware.
With a rod protruding from both caps, you can mount a tool on the front and a counterbalance or secondary striker on the rear, keeping the load symmetric on the bearings.
Choose the SCD63 when you need the equal 1402 N push/pull output at 0.5 MPa. If your application demands more force, stepping up to the SCD80 bore provides 2268 N at the same pressure. For tasks that only require force in one direction, the single-rod SC63 series offers a higher push force on the full-bore side and may reduce overall length. This SCD63X40S is a direct replacement for another AirTAC SCD63 of the same 40 mm stroke, PT port thread, and magnet-equipped configuration.
Double-rod checklist
Because it is a double-rod cylinder, the effective piston area is identical on both sides. 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.
Select the SCD63 when you need identical speed and force in both directions, or when you want to attach tooling, a stop, or a sensor flag to the rear rod. The through-rod also provides better guidance and anti-rotation support than a single-rod cylinder, though it is not a substitute for a fully guided unit under high side loads.
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