Airtac SCD Standard Cylinder SCD63X825
The AirTAC Airtac SCD Standard Cylinder SCD63X825 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, 825mm stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ63 mm
- Rod (both ends)Ø20 mm
- Stroke825 mm
- Port sizePT1/4
- Rod configDouble rod (through)
- CushionAdjustable, 28 mm
About the Airtac SCD Standard Cylinder SCD63X825
The SCD63X825 is a double-acting pneumatic cylinder with a through-rod design, meaning the Ø20 mm piston rod extends from both ends of the body. This configuration gives you identical force and speed in both directions—1402 N of thrust at 0.5 MPa for both push and pull strokes—because the rod area is subtracted from the piston area on both sides. With an 825 mm stroke, it is well within the 1500 mm maximum standard stroke for the 63 mm bore, making it a stock-configuration actuator for longer-travel, dual-sided tasks.
At 0.9 MPa, the output climbs to 2523 N, providing substantial force for a cylinder with a body length A of 210 mm. The adjustable air cushion (28 mm long) at each end decelerates the piston smoothly, protecting the end caps during high-cycle operation. The PT1/4 ports and M16x1.5 rod threads ensure straightforward pneumatic connections and tooling attachment on both ends of the rod.
Airtac SCD Standard Cylinder SCD63X825 Technical Specifications
| Model | Airtac SCD Standard Cylinder SCD63X825 |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø63 mm |
| Rod diameter | Ø20 mm (both ends) |
| Stroke | 825 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 SCD63X825
| SCD | Double-rod tie-rod cylinder series (rod out both ends). |
|---|---|
| 63 | Bore size in mm. |
| ×825 | 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 SCD63X825 Is Used
Dual-Sided Transfer Shuttle
The rod extending from both ends allows a single cylinder to power two opposing transfer mechanisms or a shuttle table, moving a part from one station and returning a fixture from the other side simultaneously with equal force.
Non-Rotating Pusher with Rear Flag
The rear rod provides excellent anti-rotation stability and can be used to mount a sensor flag or cam. This setup is ideal for a long-stroke pusher where piston rotation must be prevented and end-of-stroke sensing is needed on the back side.
Symmetric Clamping & Forming
In a press or forming application, the equal push/pull force of 2523 N at 0.9 MPa ensures consistent pressure is applied to a tool from both directions, or that a clamping mechanism opens and closes with identical, predictable force.
Is the Airtac SCD Standard Cylinder SCD63X825 the Right Cylinder?
This 63 mm bore model is a mid-range workhorse. If your application needs more force, stepping up to the SCD80 (2268 N at 0.5 MPa) with its Ø25 mm rod is a logical move; for a lighter, more compact solution, the SCD50 provides 825 N. Remember that a double-rod cylinder is not a guided cylinder—for an 825 mm stroke, the long, unsupported rod can be subject to bending under side loads. If your load is not perfectly axial, use an external guide rail or switch to a guided actuator to prevent rod damage and seal wear.
For a direct replacement, match these five points: 63 mm bore, 825 mm stroke, PT1/4 port thread, basic mounting (no brackets), and no magnet. This ensures the new unit will fit the existing plumbing, mounting holes, and sensor setup without modification.
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 SCD63X825 FAQ
Because it is a double-rod cylinder, the push and pull forces are identical. At 0.5 MPa, it outputs 1402 N; at 0.7 MPa, 1962 N; and at the maximum operating pressure of 0.9 MPa, it delivers 2523 N. The theoretical force at 1.0 MPa is 286 kgf.
Choose an SCD when you need to mount tooling or sensors on both ends of the rod, require perfectly equal force and speed in both directions, or need the superior guidance and anti-rotation support a through-rod provides. A single-rod SC cylinder has a higher push force due to the full piston area but a lower pull force, and it only offers one rod end for work attachment.
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