The AirTAC Airtac SCD Standard Cylinder SCD50X25TC 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, 25mm stroke, PT1/4 ports and adjustable end cushioning.
The SCD50X25TC is a double-acting, double-rod pneumatic cylinder with a 50 mm bore and a short 25 mm stroke, configured with a centre trunnion (TC) mount for pivoting applications. Its through-rod design, using a 20 mm diameter rod on both ends, guarantees mathematically identical push and pull forces of 825 N at 0.5 MPa, making it ideal for compact mechanisms requiring balanced, two-sided actuation.
This model's TC mounting, supplied with the TCM1 bracket (F-SC50TC), allows the cylinder to pivot freely, absorbing misalignment in swinging or rotary transfer tasks. The body length A(SCD) is 207 mm, and the adjustable air cushion at each end (21 mm) smoothly decelerates the piston, protecting the assembly during high-cycle, short-stroke shuttling.
| Model | Airtac SCD Standard Cylinder SCD50X25TC |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø50 mm |
| Rod diameter | Ø20 mm (both ends) |
| Stroke | 25 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. |
| ×25 | 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 force in both directions and pivoting TC mount make this cylinder perfect for small shuttle gates or diverters, ensuring consistent speed and thrust for each cycle.
Utilize the rear rod to operate a secondary clamp or sensor flag, synchronizing two actions from one compact 25 mm stroke cylinder without complex linkages.
The dual-rod guidance provides inherent anti-rotation, allowing the front rod to push a part off a line while the rear rod can be fitted with a hard stop for precise stroke adjustment.
Choose the SCD50 bore when your application needs around 825 N of force in both directions at standard plant pressure. If you require significantly more thrust, stepping up to the SCD63 bore provides 1402 N at the same 0.5 MPa. For a fixed linear push-only task where a rear rod isn't needed, a single-rod SC50 cylinder is a more economical choice. This SCD50X25TC is a direct replacement for any AirTAC SCD50X25 with a TC mount and PT ports; ensure the bore, stroke, port thread, and centre trunnion accessory match exactly.
Double-rod checklist
Yes. Because the piston rod extends through both end caps, the effective pressure area is identical on both sides of the piston. At 0.5 MPa, this model outputs exactly 825 N in both the extend and retract strokes.
Select the SCD when you need to mount tooling or sensors on both ends, require perfectly balanced speed and force for a reciprocating motion, or want the improved bearing support and anti-rotation that a through-rod design offers. If you only need a simple push from one side, the SC series is sufficient.
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