The AirTAC Airtac SCD Standard Cylinder SCD50X450S 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, 450mm stroke, PT1/4 ports and adjustable end cushioning.
The SCD50X450S is a 50 mm bore double-rod pneumatic cylinder delivering symmetrical force output of 825 N in both directions at 0.5 MPa, rising to 1484 N at the maximum operating pressure of 0.9 MPa. Because the 20 mm rod passes through both end caps, the effective piston area is identical on the push and pull strokes, giving you perfectly balanced speed and thrust for two-sided tooling or linked mechanisms. The 450 mm stroke is well within the 1200 mm maximum standard stroke for this bore size.
This model includes a built-in magnet (-S suffix), allowing you to mount CMSG, DMSG, or EMSG reed and solid-state sensors directly onto the tie-rod barrel for non-contact end-of-stroke or mid-stroke position sensing. The cylinder body has a retracted length of 207 mm (dimension A), uses a PT1/4 port, and features an adjustable air cushion of 21 mm at each end to decelerate the load smoothly. It is a genuine AirTAC double-acting cylinder, built for reliable industrial service.
| Model | Airtac SCD Standard Cylinder SCD50X450S |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø50 mm |
| Rod diameter | Ø20 mm (both ends) |
| Stroke | 450 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. |
| ×450 | 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 push/pull force of 825 N at 0.5 MPa makes the SCD50X450S ideal for shuttling parts between two stations. The rear rod can carry a counterbalance or a secondary tool, ensuring the load is driven symmetrically in both directions.
With the integrated magnet, mount DMSG sensors to confirm the piston has reached a specific intermediate point along the 450 mm travel. This is perfect for two-step pressing or gluing operations where you need to verify position before the next cycle starts.
Use the rear rod extension to mount a sensing flag or a mechanical stop for a secondary alignment jig. The through-rod design provides better concentricity and guidance than a single rod, keeping both ends of the tooling synchronized.
Choose the SCD50 bore when your application needs balanced bidirectional force around 825 N at standard plant pressure. If you require more thrust, stepping up to the SCD63 bore provides 1402 N at the same 0.5 MPa. For purely single-sided push tasks where a rear rod is unnecessary, the standard SC single-rod cylinder is a more compact and cost-effective alternative. Always ensure the load is guided externally; the through-rod improves bearing support but does not eliminate the need for a separate guide system under side load.
For a 450 mm stroke, pay close attention to rod buckling and bending, especially if the load is not perfectly axial. The 20 mm rod extending from both ends can experience deflection under compressive loads; use an external guide rail or switch to a guided cylinder if significant side forces are present. As a direct replacement, match the 50 mm bore, 450 mm stroke, PT port thread, basic mounting, and the -S magnet option to an identical AirTAC SCD50X450S model.
Double-rod checklist
The forces are identical in both directions because it is a double-rod cylinder. At 0.5 MPa you get 825 N, at 0.7 MPa you get 1154 N, and at the maximum operating pressure of 0.9 MPa the force is 1484 N. The theoretical maximum at 1.0 MPa is 168 kgf.
Choose the SCD when you need perfectly equal force and speed in both directions, or when you need to mount tooling, a sensor flag, or a mechanical stop on the rear rod. The through-rod also provides better support for the piston and rod bearings, reducing uneven wear compared to a single-rod cylinder in applications with frequent bidirectional cycling.
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.