The AirTAC Airtac SCD Standard Cylinder SCD50X500 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, 500mm stroke, PT1/4 ports and adjustable end cushioning.
The SCD50X500 is a double-acting, double-rod pneumatic cylinder producing identical thrust in both directions—825 N at 0.5 MPa and up to 1484 N at 0.9 MPa—because the 20 mm rod passes through both end caps, equalizing the effective piston area on each side. With a 500 mm stroke and a body length A(SCD) of 207 mm, this tie-rod cylinder is built for applications that need a rear rod extension for mounting sensors, stoppers, or secondary tooling.
Both rod ends share the M16x1.5 thread and benefit from the same 21 mm adjustable air cushion on the extend and retract strokes, helping to decelerate the piston smoothly. The SCD50X500 operates on filtered air from 0.15 to 1.0 MPa across a -20 to +70 °C range and accepts PT1/4 ports. Its through-rod design improves guidance and resists rotation better than a single-rod cylinder, though sustained side loads still call for an external guide.
| Model | Airtac SCD Standard Cylinder SCD50X500 |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø50 mm |
| Rod diameter | Ø20 mm (both ends) |
| Stroke | 500 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. |
| ×500 | 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 SCD50X500 ideal for shuttle tables that move a fixture between two stations, using the rear rod to trigger limit valves or carry a counterbalance.
With a rod protruding from both ends, the cylinder body stays centered and resists twisting. Use the 500 mm stroke to push product off a conveyor while the rear rod drives a stripper plate or sensor flag.
Mount a pressing tool on the front rod and a return stop on the rear rod. The SCD50X500 applies the same 1484 N of force at 0.9 MPa to both sides of a workpiece for symmetrical crimping or staking.
Choose the SCD50X500 when your mechanism needs equal force and speed in both directions and a rear rod for auxiliary functions. If 825 N at 0.5 MPa is slightly low, the SCD63 bore steps up to 1402 N at the same pressure; if the 500 mm stroke is more than you need, the SCD50 is also available in shorter standard strokes down to 25 mm. For applications where only one working end is required, the single-rod SC series reduces the rear protrusion and cost. At 500 mm of stroke, be mindful of rod buckling and bending on the unsupported 20 mm rod ends—if the load is not guided externally, consider pairing the cylinder with a linear guide or switching to a guided cylinder. A drop-in replacement must match the 50 mm bore, 500 mm stroke, PT1/4 ports, basic mounting, and the double-rod configuration.
Double-rod checklist
Push and pull force are identical because the piston rod passes through both ends. At 0.5 MPa the output is 825 N, at 0.7 MPa it is 1154 N, and at the maximum operating pressure of 0.9 MPa it reaches 1484 N. The theoretical force at 1.0 MPa is 168 kgf.
Choose the SCD50X500 when you need a rear rod extension to mount sensors, cams, or secondary tooling, or when you require perfectly equal force and speed in both directions. The through-rod also provides better inherent guidance and anti-rotation than a single-rod cylinder. If you only need force from one end, the SC series is more compact and cost-effective.
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