Airtac SCD Standard Cylinder SCD63X250
The AirTAC Airtac SCD Standard Cylinder SCD63X250 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, 250mm stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ63 mm
- Rod (both ends)Ø20 mm
- Stroke250 mm
- Port sizePT1/4
- Rod configDouble rod (through)
- CushionAdjustable, 28 mm
About the Airtac SCD Standard Cylinder SCD63X250
The SCD63X250 is a double-acting, double-rod pneumatic cylinder that delivers perfectly symmetrical force in both directions—1402 N at 0.5 MPa, rising to 2523 N at the maximum operating pressure of 0.9 MPa. Because the 20 mm piston rod passes through both end caps, the effective pressure area is identical on the push and pull strokes, making it ideal for applications where a return spring is impractical or where balanced, repeatable motion is required in both directions.
With a 250 mm stroke, this 63 mm bore cylinder is well within its 1500 mm maximum standard stroke length. The adjustable air cushion at each end, with a 28 mm cushion length, provides smooth deceleration, while the body length A(SCD) of 210 mm plus the dual rod extensions gives a longer overall retracted length than a comparable single-rod cylinder. The rear rod extension can be used to mount a limit switch flag, a secondary tool, or a mechanical stop.
Airtac SCD Standard Cylinder SCD63X250 Technical Specifications
| Model | Airtac SCD Standard Cylinder SCD63X250 |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø63 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, 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 SCD63X250
| SCD | Double-rod tie-rod cylinder series (rod out both ends). |
|---|---|
| 63 | 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 SCD63X250 Is Used
Two-Sided Actuation
The through-rod design allows tooling to be mounted on both ends of the SCD63X250, enabling it to perform work in two separate stations simultaneously with perfectly synchronized, equal force and speed in each direction.
Non-Rotating Pusher
The dual-rod support provides enhanced guidance, making this cylinder suitable for pushing or lifting applications where rod rotation must be minimized without adding an external guide, provided side loads are kept low.
Rear Stroke Sensing
Mount a sensor flag or a DMSG reed switch directly onto the rear rod extension for reliable, out-of-the-way end-of-stroke detection, keeping the front tooling area clear and simplifying sensor wiring on automated transfer lines.
Is the Airtac SCD Standard Cylinder SCD63X250 the Right Cylinder?
Select the SCD63 when you need the 1402 N of balanced force it provides at 0.5 MPa. If your application requires more thrust, stepping up to the SCD80 bore delivers 2268 N at the same pressure. For lighter, more compact needs, the SCD50 provides 825 N. Remember that a double-rod cylinder is not a substitute for a guided cylinder under significant side loads; if your 250 mm stroke involves off-axis forces, external guide rails or a guided cylinder are necessary. For a direct replacement, match the 63 mm bore, 250 mm stroke, PT port thread, and the specific SCD mounting accessory (like FA or LB) and magnet option (-S) from another AirTAC SCD unit.
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 SCD63X250 FAQ
The push and pull forces are identical because it is a double-rod cylinder. At 0.5 MPa, the force is 1402 N in both directions. At 0.7 MPa, it is 1962 N, and at the maximum operating pressure of 0.9 MPa, the force reaches 2523 N.
Choose the SCD63 when you need equal force and speed in both directions, or when you need to use the rear rod for mounting sensors, a mechanical stop, or secondary tooling. The dual-rod support also offers better guidance and resistance to rod rotation compared to a single-rod cylinder, though it is not a replacement for a fully guided cylinder under heavy side loads.
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