The AirTAC Airtac SCD Standard Cylinder SCD50X15 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, 15mm stroke, PT1/4 ports and adjustable end cushioning.
The SCD50X15 is a short-stroke double-rod pneumatic cylinder that outputs an identical 825 N of thrust in both directions at 0.5 MPa, thanks to its through-rod construction where the Ø20 mm rod passes through both end caps. This symmetry makes it ideal for compact two-sided tooling, precision shuttles, or clamping fixtures where the rear rod extension can carry a sensor flag or secondary stop.
With a body length A of 207 mm and an adjustable air cushion of 21 mm at each end, the SCD50X15 decelerates the piston smoothly even in rapid short-stroke cycles. Its PT1/4 ports and M16x1.5 rod threads integrate into standard AirTAC mounting accessories from the SCD subset, including FA front flange, LB foot, and TC centre trunnion.
| Model | Airtac SCD Standard Cylinder SCD50X15 |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø50 mm |
| Rod diameter | Ø20 mm (both ends) |
| Stroke | 15 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. |
| ×15 | 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 rod extending from both ends allows a single SCD50X15 to eject parts from two parallel tracks or nests simultaneously, ensuring perfectly synchronized motion without complex linkages.
With equal push-pull force of 825 N at 0.5 MPa, this cylinder drives a small transfer shuttle with consistent speed in both directions, while the rear rod can trigger a CMSG sensor for end-of-stroke confirmation.
The dual-rod support naturally resists rotation, making the SCD50X15 a good fit for a short-throw clamping jaw where a single-rod cylinder would require an external anti-rotate guide.
For applications needing slightly less force, the SCD40 bore provides 528 N at 0.5 MPa, while stepping up to the SCD63 delivers 1402 N. If your task only requires actuation from one side, the single-rod SC50 series is a simpler and more compact alternative. This SCD50X15 is a direct dimensional replacement for any AirTAC SCD50X15 cylinder sharing the same PT port thread, basic mounting, and no magnet.
At a 15 mm stroke, rod bending is not a concern, but the through-rod design still provides better bearing support than a single-rod cylinder of the same size. Should the application involve any off-axis loading, pair the cylinder with an external guide rail rather than relying on the rod bearings alone.
Double-rod checklist
Because it is a double-rod cylinder, the push and pull forces are identical. At 0.5 MPa it produces 825 N, at 0.7 MPa it reaches 1154 N, and at the maximum operating pressure of 0.9 MPa it delivers 1484 N in both directions.
Choose the SCD50 when you need equal force and speed in both directions, a rear rod extension for mounting sensors or tooling, or improved resistance to rod rotation. The single-rod SC50 is a better fit if you only need to push from one end and want a shorter overall retracted length.
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