The AirTAC Airtac SCD Standard Cylinder SCD80X40 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, 40mm stroke, PT3/8 ports and adjustable end cushioning.
The SCD80X40 is a double-acting, double-rod pneumatic cylinder that outputs identical force in both directions—2268 N at 0.5 MPa, rising to 4082 N at the maximum operating pressure of 0.9 MPa. Its 25 mm diameter rod passes through both end caps, providing a rear rod extension for mounting a sensor flag, stopper, or secondary tooling, while the symmetrical design improves bearing life under centered loads.
With a 40 mm stroke and a body length of 257 mm, this compact unit fits tight transfer and ejection stations. The adjustable air cushion (28 mm length) decelerates the piston smoothly at both ends, and the PT3/8 ports supply ample flow for the 30-800 mm/s speed range. It is a genuine AirTAC tie-rod cylinder, built for reliable cycling in general industrial automation.
| Model | Airtac SCD Standard Cylinder SCD80X40 |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø80 mm |
| Rod diameter | Ø25 mm (both ends) |
| Stroke | 40 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. |
| ×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 through-rod lets you mount a gripper on the front and a counterbalance or second tool on the rear, moving parts between two stations with equal speed and force in each direction.
Apply 2268 N of clamping force from either end of the cylinder. The dual-rod bearing support helps maintain alignment better than a single-rod cylinder in repetitive clamping cycles.
Attach a sensor flag to the exposed rear rod to detect piston position without consuming space on the front tooling plate, simplifying end-of-stroke confirmation in tight machine layouts.
This 80 mm bore model sits between the SCD63 (1402 N at 0.5 MPa) and the SCD100 (3681 N at 0.5 MPa). If your application needs more thrust, step up to the 100 mm bore; for a lighter, more compact actuator, the 63 mm bore is a better fit. A single-rod SC cylinder would be the right choice if you only need force output from one end and want a shorter overall length.
For a drop-in replacement, match the 80 mm bore, 40 mm stroke, PT3/8 ports, and the specific SCD mounting accessory (basic, FA, LB, or TC). The built-in magnet option (-S) must also match if your existing setup uses barrel-mounted sensors. At this short stroke, rod bending is not a concern.
Double-rod checklist
Because it is a double-rod cylinder, the push and pull forces are equal. At 0.5 MPa it produces 2268 N, at 0.7 MPa it produces 3175 N, and at the maximum operating pressure of 0.9 MPa it produces 4082 N. The theoretical force at 1.0 MPa is 463 kgf.
Choose the SCD when you need identical force and speed in both directions, or when you require a rear rod extension to mount a sensor flag, stopper bolt, or secondary tool. The through-rod also provides better guidance and bearing load distribution than a single-rod cylinder, though it is not a substitute for a fully guided cylinder under high side loads.
Genuine AirTAC parts produced by AirTAC factory.
Covers non-human-caused product damage.
Standard models usually ship in 3-4 days.
Most inquiries answered within 7-8 hours.
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.