Airtac SCD Standard Cylinder SCD50X520S
The AirTAC Airtac SCD Standard Cylinder SCD50X520S 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, 520mm stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ50 mm
- Rod (both ends)Ø20 mm
- Stroke520 mm
- Port sizePT1/4
- Rod configDouble rod (through)
- CushionAdjustable, 21 mm
About the Airtac SCD Standard Cylinder SCD50X520S
The SCD50X520S is a double-acting, double-rod pneumatic cylinder that delivers perfectly symmetrical force in both directions—825 N at 0.5 MPa—because the 20 mm rod passes through both end caps. This 520 mm stroke model includes a factory-installed magnet, allowing CMSG/DMSG/EMSG sensors to clamp directly onto the tie-rod barrel for clean, reliable end-of-stroke detection without external brackets.
With its 50 mm bore and PT1/4 ports, this cylinder suits mid-force transfer and tooling tasks where a rear rod extension is needed. The adjustable air cushion (21 mm) decelerates the piston smoothly at each end, and the body length A(SCD) of 207 mm keeps the package compact for the stroke. At 0.9 MPa the output climbs to 1484 N each way, giving a comfortable margin for acceleration and payload variation.
Airtac SCD Standard Cylinder SCD50X520S Technical Specifications
| Model | Airtac SCD Standard Cylinder SCD50X520S |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø50 mm |
| Rod diameter | Ø20 mm (both ends) |
| Stroke | 520 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 SCD50X520S
| SCD | Double-rod tie-rod cylinder series (rod out both ends). |
|---|---|
| 50 | Bore size in mm. |
| ×520 | 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 SCD50X520S Is Used
Two-Sided Transfer Shuttle
The through rod lets you mount a tooling plate on each end, moving parts between two stations with equal speed and force in both directions.
Non-Rotating Pusher
Dual rod support resists twisting better than a single rod, making the SCD50X520S suitable for pushing loads that must stay aligned without adding an external guide rail.
Rear-Mounted Stroke Sensing
The integrated magnet and exposed rear rod provide a convenient place to mount a sensor flag or cam, enabling position feedback from the back of the cylinder where space is available.
Is the Airtac SCD Standard Cylinder SCD50X520S the Right Cylinder?
Choose the SCD50 when you need equal push-pull force around 825 N at standard plant pressure. If your load requires more thrust, step up to the SCD63 (1402 N at 0.5 MPa); for a lighter, faster-moving carriage the SCD40 (528 N) may be a better fit. If you only need force from one end, the single-rod SC50 is simpler and slightly shorter overall. For this 520 mm stroke, ensure the load is guided—the through rod provides better bearing support than a single rod, but it is not a substitute for an external guide or a guided cylinder when real side forces are present.
This SCD50X520S is a direct replacement for another AirTAC SCD50 of the same 520 mm stroke, PT port thread, and magnet option. Match the bore, stroke, port type, magnet suffix, and any mounting accessory (basic, FA, LB, or TC) to guarantee drop-in interchangeability. The built-in magnet means your existing CMSG/DMSG sensors will transfer straight across.
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 SCD50X520S FAQ
Push and pull force are identical because the 20 mm rod passes through both ends. At 0.5 MPa you get 825 N, at 0.7 MPa 1154 N, and at the maximum operating pressure of 0.9 MPa the output is 1484 N in both directions.
Pick the SCD when you need equal force and speed in both directions, a rear rod end to mount tooling or a sensor flag, or better anti-rotation guidance from the dual rod supports. If you only need force from one end and want a shorter overall length, the single-rod SC50 is the better choice.
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