The AirTAC Airtac SCD Standard Cylinder SCD80X35 is a genuine double-acting DOUBLE-ROD air cylinder: the Ø25mm piston rod extends from BOTH end caps, giving equal effective area — and therefore equal force — in push and pull. Ø80mm bore, 35mm stroke, PT3/8 ports and adjustable end cushioning.
The SCD80X35 is a double-acting, double-rod pneumatic cylinder that produces identical force in both directions—2268 N at 0.5 MPa—because the 25 mm rod passes through both end caps. This symmetrical output makes it ideal for short-stroke, two-sided tasks where a rear rod extension is needed for a sensor flag or secondary tooling.
With a 35 mm stroke and an 80 mm bore, the cylinder's adjustable air cushion (28 mm length) decelerates the piston smoothly at both ends of travel. The body length A(SCD) is 257 mm, and the PT3/8 ports supply air filtered to 40 µm. At the maximum operating pressure of 0.9 MPa, the equal push and pull thrust reaches 4082 N.
| Model | Airtac SCD Standard Cylinder SCD80X35 |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø80 mm |
| Rod diameter | Ø25 mm (both ends) |
| Stroke | 35 mm |
| Rod configuration | Double rod — rod through both caps |
| Acting type | Double acting |
| Port size | PT3/8 |
| Rod thread | M20×1.5 |
| 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 | 2268 N | 2268 N |
| 0.7 MPa | 3175 N | 3175 N |
| Max (@1.0 MPa) | 463 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). |
|---|---|
| 80 | Bore size in mm. |
| ×35 | 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 actuates a secondary tamp pad in sync with the front rod, applying labels to both sides of a product simultaneously with equal force and speed.
Both rod ends are connected to opposing clamp arms, centering and holding a part with perfectly balanced 2268 N force at 0.5 MPa for a stable machining setup.
A sensor flag on the rear rod extension triggers a CMSG reed switch, confirming full retraction in a tight space where the front rod end is inaccessible.
For a 35 mm stroke, the SCD80X35's 80 mm bore is a strong mid-range choice. If your application needs less force, the SCD63 bore delivers 1402 N at 0.5 MPa, while stepping up to the SCD100 bore provides 3681 N. The double-rod design is the right pick when you need a rear rod for a mechanical stop or stroke sensing; if you only need force from one end, a single-rod SC80 cylinder is a simpler and more compact alternative.
To replace an existing cylinder, match the 80 mm bore, 35 mm stroke, PT3/8 port thread, and the basic mounting style. If you need to add sensor feedback later, order the -S magnet option. For any side load, even on a short stroke, an external guide rail is recommended because the through-rod provides better bearing support than a single rod but is not a true guided cylinder.
Double-rod checklist
The push and pull forces are identical. At 0.5 MPa it is 2268 N, at 0.7 MPa it is 3175 N, and at the maximum operating pressure of 0.9 MPa it reaches 4082 N. This is because the 25 mm rod area is subtracted from both sides of the piston.
Choose the SCD80 when you need a rear rod extension for mounting a sensor flag, a mechanical stop, or a secondary tool. It also provides better rod guidance and perfectly equal speed and force in both directions, which is critical for two-sided actuation. If you only need force from one end, the single-rod SC80 is a more cost-effective choice.
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