Airtac SCD Standard Cylinder SCD50X400
The AirTAC Airtac SCD Standard Cylinder SCD50X400 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, 400mm stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ50 mm
- Rod (both ends)Ø20 mm
- Stroke400 mm
- Port sizePT1/4
- Rod configDouble rod (through)
- CushionAdjustable, 21 mm
About the Airtac SCD Standard Cylinder SCD50X400
The AirTAC SCD50X400 is a double-acting, double-rod pneumatic cylinder where the piston rod extends from both ends, providing an identical effective pressure area in each direction. At 0.5 MPa, this model outputs a balanced 825 N of thrust for both the push and pull strokes, making it ideal for applications requiring symmetric motion control over its 400 mm travel.
A 20 mm diameter rod passes through both end caps, subtracting the same area from each chamber and giving the cylinder a retracted body length of 207 mm (dimension A). The adjustable air cushion at each end is 21 mm long, allowing you to dial in smooth deceleration for the moving mass. This model uses PT1/4 ports and an M16x1.5 rod thread, and its maximum standard stroke for the 50 mm bore is 1200 mm.
Airtac SCD Standard Cylinder SCD50X400 Technical Specifications
| Model | Airtac SCD Standard Cylinder SCD50X400 |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø50 mm |
| Rod diameter | Ø20 mm (both ends) |
| Stroke | 400 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 SCD50X400
| SCD | Double-rod tie-rod cylinder series (rod out both ends). |
|---|---|
| 50 | Bore size in mm. |
| ×400 | 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 SCD50X400 Is Used
Two-Sided Transfer Shuttles
The through-rod allows tooling to be mounted on both ends, enabling a single cylinder to shuttle parts between two parallel conveyor lines with perfectly synchronized motion.
Symmetric Clamping Fixtures
Use the equal push and pull force to drive opposing clamp arms from a central pivot, ensuring even pressure distribution on both sides of a workpiece during machining.
Non-Rotating Pusher Stations
The dual-rod support provides better resistance to rod rotation than a single-rod cylinder, making it suitable for pushing rectangular products without adding an external guide rail.
Is the Airtac SCD Standard Cylinder SCD50X400 the Right Cylinder?
Select the SCD50X400 when your mechanism needs equal push and pull force from both ends of the cylinder. If 825 N at 0.5 MPa is insufficient, stepping up to the 63 mm bore (SCD63) provides 1402 N at the same pressure. If you need force in only one direction and a rear rod is unnecessary, the single-rod SC series is a more economical choice.
For a 400 mm stroke, be mindful of the long, unsupported rod extending from the rear. Under side loads, rod buckling or bearing wear can occur. If the rear rod must carry a tool or sensor flag, keep its mass low and aligned; for significant side forces, switch to an externally guided unit. A direct replacement must match the 50 mm bore, 400 mm stroke, PT1/4 ports, basic mounting, and the absence of a magnet.
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 SCD50X400 FAQ
Because it is a double-rod cylinder, the push and pull forces are identical. The force is 825 N at 0.5 MPa, 1154 N at 0.7 MPa, and reaches 1484 N at the maximum operating pressure of 0.9 MPa.
Choose the SCD when you need a rear rod extension to mount a sensor cam, a mechanical stop, or secondary tooling. The dual-rod design also gives the piston better bearing support, which helps resist lateral deflection and rod rotation better than a single-rod cylinder of the same bore.
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 SCD50X400
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.