Airtac SCD Standard Cylinder SCD200X125S
The AirTAC Airtac SCD Standard Cylinder SCD200X125S is a genuine double-acting DOUBLE-ROD air cylinder: the Ø40mm piston rod extends from BOTH end caps, giving equal effective area — and therefore equal force — in push and pull. Ø200mm bore, 125mm stroke, PT3/4 ports and adjustable end cushioning.
- BoreØ200 mm
- Rod (both ends)Ø40 mm
- Stroke125 mm
- Port sizePT3/4
- Rod configDouble rod (through)
- CushionAdjustable, 33 mm
About the Airtac SCD Standard Cylinder SCD200X125S
The SCD200X125S is a heavy-duty double-rod pneumatic cylinder that generates an identical 15080 N of force in both the extend and retract strokes at 0.5 MPa, thanks to its through-rod design where the 40 mm rod occupies both pressure chambers. This symmetry eliminates force differentials, making it ideal for large fixtures that require balanced, bidirectional thrust.
With a 125 mm stroke and a body length A of 362 mm, this model includes a built-in magnet (-S suffix) so you can mount CMSG, DMSG, or EMSG reed or solid-state sensors directly on the tie-rod barrel for end-of-stroke detection on either side. The adjustable air cushion (29 mm) at both ends decelerates the massive piston smoothly, protecting your tooling at the 0.9 MPa operating thrust of 27143 N.
Airtac SCD Standard Cylinder SCD200X125S Technical Specifications
| Model | Airtac SCD Standard Cylinder SCD200X125S |
|---|---|
| Series | SCD double-rod tie-rod cylinder (ISO 6430 class) |
| Bore size | Ø200 mm |
| Rod diameter | Ø40 mm (both ends) |
| Stroke | 125 mm |
| Rod configuration | Double rod — rod through both caps |
| Acting type | Double acting |
| Port size | PT3/4 |
| Rod thread | M36×2 |
| 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 – 500 mm/s |
| Cushion | Adjustable, 33 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 (Ø200mm, double rod)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 15080 N | 15080 N |
| 0.7 MPa | 21111 N | 21111 N |
| Max (@1.0 MPa) | 3075 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 SCD200X125S
| SCD | Double-rod tie-rod cylinder series (rod out both ends). |
|---|---|
| 200 | Bore size in mm. |
| ×125 | 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 SCD200X125S Is Used
Bidirectional Heavy Press
Uses equal 15080 N force in both directions to operate a two-sided forming or stamping platen, ensuring consistent pressure regardless of stroke direction.
Symmetric Material Tensioning
The through-rod anchors one end to a fixed frame while the other pulls, creating a balanced tensioning station for large conveyor belts or composite layup.
Rear-Mounted Stroke Sensing
The built-in magnet on the barrel lets you mount sensors on the rear side of the cylinder to confirm retracted position in tight spaces where the front rod end is obstructed.
Is the Airtac SCD Standard Cylinder SCD200X125S the Right Cylinder?
Step up to this 200 mm bore when the SCD160 (9425 N at 0.5 MPa) lacks the muscle for your dual-sided tooling. If your application only needs force from one end, the single-rod SC200X125 is a lighter and more compact alternative. For a drop-in replacement, match the 200 mm bore, 125 mm stroke, PT port thread, basic mounting, and the -S magnet option; an SCD cylinder from another brand will not share the same tie-rod dimensions or mounting accessory pattern. At this stroke, the dual 40 mm rods provide excellent guidance, but sustained side loads still demand an external linear guide or a dedicated guided cylinder to prevent rod bending.
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 SCD200X125S FAQ
Because it is a double-rod cylinder, the push and pull forces are identical. At 0.5 MPa it outputs 15080 N, at 0.7 MPa it outputs 21111 N, and at the maximum operating pressure of 0.9 MPa it reaches 27143 N in both directions.
Choose the SCD when you need perfectly equal force and speed in both directions, or when you need a rear rod extension to mount a secondary tool, a mechanical stop, or a sensor flag. The through-rod also provides better bearing support than a single-rod cylinder, reducing rod deflection.
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