The AirTAC Airtac SCD Standard Cylinder SCD63X65S 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, 65mm stroke, PT1/4 ports and adjustable end cushioning.
The SCD63X65S is a double-acting, double-rod pneumatic cylinder that provides identical force and speed in both directions because the 20 mm rod passes through both end caps, subtracting the same area on each side. At 0.5 MPa this model outputs 1402 N of thrust whether extending or retracting, making it a predictable choice for symmetric motion tasks.
With a 65 mm stroke and a body length A(SCD) of 210 mm, this unit includes a built-in magnet (-S suffix) so you can mount CMSG, DMSG, or EMSG reed or solid-state sensors directly on the tie-rod barrel for end-of-stroke or mid-stroke position feedback. The adjustable air cushion (28 mm long) decelerates the piston smoothly at both ends of travel, protecting the end caps during high-cycle operation.
| Model | Airtac SCD Standard Cylinder SCD63X65S |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø63 mm |
| Rod diameter | Ø20 mm (both ends) |
| Stroke | 65 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. |
| ×65 | 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 rear rod can push a part off a fixture while the front rod advances the next carrier, using the equal 1402 N force in both strokes to synchronize a simple two-position transfer without complex linkages.
Mount a stripper plate on the rear rod and a forming tool on the front. Both ends move together with identical thrust, ensuring the part is clamped and formed in one clean, symmetric pneumatic cycle.
With the built-in magnet, a DMSG sensor on the rear tie-rod detects the piston position without interfering with the front tooling, giving clean end-of-stroke signals for a PLC even when the front end is enclosed in guarding.
Choose the SCD63 bore when your application needs about 1400 N of force at standard plant pressure. If you can work with less thrust, stepping down to the SCD50 (825 N at 0.5 MPa) saves space and air consumption; stepping up to the SCD80 (2268 N) handles heavier tooling. This double-rod design is ideal when you need to attach tooling or a sensor flag to the rear rod, but if your load applies significant side force, a guided cylinder or external linear guide is required—the through-rod improves guidance over a single-rod cylinder but does not make it a fully supported actuator. For a direct replacement, match the 63 mm bore, 65 mm stroke, PT port thread, basic mounting, and the -S magnet option.
Double-rod checklist
Because the 20 mm piston rod extends out both ends of the cylinder. The rod cross-sectional area is subtracted from the bore area on both the push and pull sides, so the effective piston area is identical in both directions. At 0.5 MPa, you get 1402 N extending and 1402 N retracting.
Choose the SCD when you need a rear rod extension to mount tooling, a mechanical stop, or a sensor flag, or when you want the slightly better rod guidance and anti-rotation that a through-rod provides. If you only need force from one end and want a shorter overall length, the single-rod SC63 is the better fit.
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