Airtac SCD Standard Cylinder SCD63X55
The AirTAC Airtac SCD Standard Cylinder SCD63X55 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, 55mm stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ63 mm
- Rod (both ends)Ø20 mm
- Stroke55 mm
- Port sizePT1/4
- Rod configDouble rod (through)
- CushionAdjustable, 28 mm
About the Airtac SCD Standard Cylinder SCD63X55
The SCD63X55 is a double-acting pneumatic cylinder with a piston rod that extends from both ends, delivering identical push and pull force in each direction. At 0.5 MPa, this 63 mm bore unit outputs a balanced 1402 N of thrust, making it ideal for applications requiring symmetric motion or tooling mounted on both sides of the piston.
This model features a 20 mm diameter rod on each end and a compact 55 mm stroke, well within the 1500 mm maximum standard for the 63 bore. The adjustable air cushion at each end cap, with a 28 mm cushion length, decelerates the piston smoothly, while the PT1/4 ports and M16x1.5 rod thread ensure straightforward integration into pneumatic circuits.
Airtac SCD Standard Cylinder SCD63X55 Technical Specifications
| Model | Airtac SCD Standard Cylinder SCD63X55 |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø63 mm |
| Rod diameter | Ø20 mm (both ends) |
| Stroke | 55 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 SCD63X55
| SCD | Double-rod tie-rod cylinder series (rod out both ends). |
|---|---|
| 63 | Bore size in mm. |
| ×55 | 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 SCD63X55 Is Used
Two-Sided Actuation
Operates a linkage or tool on both ends of the cylinder with perfectly matched force and speed, simplifying the mechanical design of symmetrical transfer systems.
Non-Rotating Pusher
The dual-rod construction provides inherent anti-rotation guidance for a short-stroke pusher or ejector, maintaining alignment without an external guide rail.
Rear-Mounted Sensing
The rear rod end serves as a convenient flag point for external position sensors or a manual stroke indicator, keeping the front tooling area clear.
Is the Airtac SCD Standard Cylinder SCD63X55 the Right Cylinder?
Choose the SCD63X55 when your mechanism needs equal force and speed in both directions from a compact stroke. If you require higher thrust, stepping up to the SCD80 bore provides 2268 N at the same 0.5 MPa. For applications where force is only needed in one direction, the single-rod SC63 series offers a higher push force from the full piston area and may be a more economical choice. As a direct replacement, match an existing SCD cylinder on all five key points: 63 mm bore, 55 mm stroke, PT port thread, basic mounting style, 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 SCD63X55 FAQ
Because the SCD is a double-rod cylinder, the effective piston area is the same on both sides. The force is identical in both directions: 1402 N at 0.5 MPa, 1962 N at 0.7 MPa, and 2523 N at the maximum operating pressure of 0.9 MPa.
Choose the SCD when your application requires equal force and speed for both the extend and retract strokes, or when you need to mount tooling, a stop, or a sensor target on the rear rod. The through-rod also provides better guidance and resistance to side load than a single-rod cylinder of the same bore.
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