The AirTAC Airtac SCD Standard Cylinder SCD50X240 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. Ø50mm bore, 240mm stroke, PT1/4 ports and adjustable end cushioning.
The SCD50X240 is a double-acting pneumatic cylinder engineered with a continuous piston rod extending from both ends, ensuring identical push and pull force of 825 N at 0.5 MPa. This symmetry is ideal for applications requiring balanced motion or tooling mounted on the rear rod. The 50 mm bore unit uses a 20 mm rod, PT1/4 ports, and has a body length A of 207 mm, providing a compact yet robust platform for transfer mechanisms.
With a 240 mm stroke, this model stays within the standard range for the 50 mm bore, which supports strokes up to 1200 mm. The adjustable air cushion at each end, with a 21 mm cushion length, decelerates the piston smoothly to reduce end-of-stroke impact. Its tie-rod construction makes it serviceable, and the dual rod provides inherent anti-rotation stability for light tooling without needing an external guide.
| Model | Airtac SCD Standard Cylinder SCD50X240 |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø50 mm |
| Rod diameter | Ø20 mm (both ends) |
| Stroke | 240 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, 21 mm |
| Max stroke | Up to 1200 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 | 825 N | 825 N |
| 0.7 MPa | 1155 N | 1155 N |
| Max (@1.0 MPa) | 168 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). |
|---|---|
| 50 | Bore size in mm. |
| ×240 | 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 825 N force in both directions makes this cylinder perfect for shuttling parts between two stations, where consistent speed and thrust are required for each move.
The dual-rod design resists rotation, allowing a simple pusher plate to be mounted directly to the rod ends without a complex external anti-rotation linkage.
The rear rod extension provides a convenient mounting point for a sensor flag or mechanical stop, enabling end-of-stroke detection or position limiting without interfering with the main tooling.
Select the SCD50X240 when your application demands equal force in both directions, such as a two-sided pusher or a shuttle table. If you need more thrust, the SCD63 bore offers 1402 N at the same 0.5 MPa pressure. For applications where the rear rod is not needed and a lower profile is desired, the single-rod SC series is a more compact alternative. For direct replacement, match the 50 mm bore, 240 mm stroke, PT port thread, and basic mounting style.
At a 240 mm stroke, the through rod is well-supported, but if you intend to attach offset tooling to the rear rod extension, ensure the side load stays within the rod bearing's capacity. For heavy eccentric loads, consider pairing the cylinder with an external linear guide rather than relying solely on the dual-rod support.
Double-rod checklist
Because the rod passes through both ends, the push and pull forces are identical. At 0.5 MPa it produces 825 N, at 0.7 MPa it is 1154 N, and at the maximum operating pressure of 0.9 MPa it reaches 1484 N in either direction.
Choose the SCD when you need equal force and speed in both directions, or when you want to mount tooling, a stop, or a sensor target on the rear rod. The through-rod also provides better guidance and anti-rotation than a single-rod cylinder, though it is not a replacement for a fully guided actuator under heavy 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.