Airtac SCD Standard Cylinder SCD63X50S
The AirTAC Airtac SCD Standard Cylinder SCD63X50S 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. Ø63mm bore, 50mm stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ63 mm
- Rod (both ends)Ø20 mm
- Stroke50 mm
- Port sizePT1/4
- Rod configDouble rod (through)
- CushionAdjustable, 28 mm
About the Airtac SCD Standard Cylinder SCD63X50S
The SCD63X50S is a double-acting, double-rod pneumatic cylinder that delivers identical force in both directions—1402 N at 0.5 MPa—thanks to its through-rod design where the 20 mm rod passes through both end caps. This short 50 mm stroke unit is ideal for compact two-sided actuation, such as operating a gate or transfer mechanism where tooling can be mounted on both ends of the rod.
Equipped with a built-in magnet (-S suffix), this cylinder allows CMSG, DMSG, or EMSG sensors to be clamped directly onto the tie-rod barrel for non-contact position sensing. The body length A(SCD) is 210 mm, and the adjustable air cushion (28 mm) provides smooth deceleration at each end of the stroke, protecting the end caps during high-cycle operation.
Airtac SCD Standard Cylinder SCD63X50S Technical Specifications
| Model | Airtac SCD Standard Cylinder SCD63X50S |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø63 mm |
| Rod diameter | Ø20 mm (both ends) |
| Stroke | 50 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, 28 mm |
| Max stroke | Up to 1500 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 (Ø63mm, double rod)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 1402 N | 1402 N |
| 0.7 MPa | 1962 N | 1962 N |
| Max (@1.0 MPa) | 286 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 SCD63X50S
| SCD | Double-rod tie-rod cylinder series (rod out both ends). |
|---|---|
| 63 | Bore size in mm. |
| ×50 | 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 SCD63X50S Is Used
Two-Sided Transfer Gates
The rod extending from both ends allows a single cylinder to actuate two opposing gates or stops simultaneously, ensuring synchronized movement in compact conveyor diverters.
Rear-Mounted Stroke Sensing
With the built-in magnet, a DMSG sensor on the rear end cap detects piston position even when the front rod is obscured, ideal for confirming retraction in tight machine envelopes.
Symmetric Clamping Fixtures
The equal push/pull force of 1402 N at 0.5 MPa provides balanced clamping pressure from both sides, preventing part distortion in light assembly or welding jigs.
Is the Airtac SCD Standard Cylinder SCD63X50S the Right Cylinder?
Choose the SCD63 bore when your application requires approximately 1400 N of balanced force each way at standard plant pressure. If you need more thrust, the SCD80 delivers 2268 N at the same 0.5 MPa, while the SCD50 offers 825 N for lighter tasks. This double-rod configuration is the correct choice when you need to attach tooling, a stopper, or a sensor flag to the rear rod, or when you require equal speed and force in both directions—a single-rod SC cylinder cannot provide this symmetry.
For replacement, match the 63 mm bore, 50 mm stroke, PT port thread, basic mounting, and the -S magnet option. If your application involves significant side loads, an external guide rail or a dedicated guided cylinder is recommended, as the dual-rod design improves guidance but is not a substitute for a true linear guide under heavy radial forces.
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 SCD63X50S FAQ
The push and pull forces are identical because the rod passes through both ends. At 0.5 MPa the force is 1402 N, at 0.7 MPa it is 1962 N, and at the maximum operating pressure of 0.9 MPa it reaches 2523 N.
Choose the SCD when you need equal force and speed in both directions, or when you must mount tooling, a mechanical stop, or a sensor target on the rear rod. The through-rod also provides better bearing support than a single-rod cylinder, reducing rod deflection in push-pull applications.
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