Airtac SCD Standard Cylinder SCD50X250
The AirTAC Airtac SCD Standard Cylinder SCD50X250 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, 250mm stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ50 mm
- Rod (both ends)Ø20 mm
- Stroke250 mm
- Port sizePT1/4
- Rod configDouble rod (through)
- CushionAdjustable, 21 mm
About the Airtac SCD Standard Cylinder SCD50X250
The SCD50X250 is a double-acting, double-rod pneumatic cylinder that outputs an identical 825 N of force in both the extend and retract strokes at 0.5 MPa, thanks to its Ø20 mm rod passing through both end caps. With a 250 mm stroke and a body length of 207 mm (A dimension), it is well-suited for applications like two-sided tooling or transfer mechanisms where a rear rod connection point is needed.
This 50 mm bore tie-rod cylinder uses PT1/4 ports and features an adjustable air cushion (21 mm) at each end to decelerate the piston smoothly. The through-rod design provides better guidance than a single-rod cylinder, helping to manage off-centre loads, though it is not a replacement for a fully guided unit under high side forces.
Airtac SCD Standard Cylinder SCD50X250 Technical Specifications
| Model | Airtac SCD Standard Cylinder SCD50X250 |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø50 mm |
| Rod diameter | Ø20 mm (both ends) |
| Stroke | 250 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.
Theoretical Output Force (Ø50mm, double rod)
| 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.
Model Code: Airtac SCD Standard Cylinder SCD50X250
| SCD | Double-rod tie-rod cylinder series (rod out both ends). |
|---|---|
| 50 | Bore size in mm. |
| ×250 | 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.
Where the Airtac SCD Standard Cylinder SCD50X250 Is Used
Two-Sided Actuation
The rod extending from both ends allows a single SCD50X250 to operate two fixtures simultaneously, such as clamping two parts on opposite sides of a machine frame with perfectly synchronized motion.
Shuttle Transfer Tables
With 825 N of force available in both directions, this cylinder is ideal for pushing and pulling a shuttle plate on a linear transfer system, ensuring consistent speed and thrust for each index.
Rear Stroke Sensing
The rear rod provides a convenient, clean mounting point for a sensor flag or cam, enabling end-of-stroke detection without interfering with the main tooling mounted on the front rod.
Is the Airtac SCD Standard Cylinder SCD50X250 the Right Cylinder?
Choose the SCD50X250 when your application needs a balanced, equal-force output in both directions and a rear rod for mounting a sensor flag, stopper, or secondary tool. If 825 N per stroke is insufficient, stepping up to the SCD63 bore provides 1402 N at the same 0.5 MPa pressure. For applications requiring only a single working end, the standard SC single-rod cylinder is a more economical choice.
This model is a direct replacement for another AirTAC SCD50X250 with the same bore, 250 mm stroke, PT port thread, and basic mounting configuration. For strokes of 250 mm or more, ensure the rod is not subjected to significant side loading; if it is, pair the cylinder with an external guide rail or switch to a guided cylinder.
Double-rod checklist
- ✓ Need equal force / speed both directions?
- ✓ Rear rod for tooling, stopper or sensor flag?
- ✓ Better rod guidance / anti-rotation?
- ✓ Port/thread type (PT/NPT/G)
- ✓ Magnet (-S) for sensors?
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Keep BOTH rod ends clear of side load and interference.
- check Adjust end cushion screws for smooth stops.
- check Use SCD mounting accessory (FA / LB / TC / TCM1).
- check Installation by qualified personnel per AirTAC docs.
Airtac SCD Standard Cylinder SCD50X250 FAQ
Because it is a double-rod cylinder, the push and pull forces are equal. At 0.5 MPa it produces 825 N, at 0.7 MPa it produces 1154 N, and at the maximum operating pressure of 0.9 MPa it delivers 1484 N in both directions.
You would select an SCD when you need identical force and speed in both directions, or when you require a rear rod connection point for mounting tooling, a stopper, or a sensor flag. The through-rod also provides better bearing support and inherent anti-rotation compared to a single-rod cylinder.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models usually ship in 3-4 days.
Fast Reply
Most inquiries answered within 7-8 hours.
Related AirTAC SCD Double-Rod Cylinders
Request a Quote for Airtac SCD Standard Cylinder SCD50X250
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.