Airtac SCD Standard Cylinder SCD200X250S
The AirTAC Airtac SCD Standard Cylinder SCD200X250S 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, 250mm stroke, PT3/4 ports and adjustable end cushioning.
- BoreØ200 mm
- Rod (both ends)Ø40 mm
- Stroke250 mm
- Port sizePT3/4
- Rod configDouble rod (through)
- CushionAdjustable, 33 mm
About the Airtac SCD Standard Cylinder SCD200X250S
The SCD200X250S is a large-bore double-rod pneumatic cylinder that produces identical force in both directions because the 40 mm rod passes through each end cap, subtracting the same area from both piston faces. At a standard 0.5 MPa supply, this model exerts 15080 N of thrust whether extending or retracting, making it a predictable actuator for heavy, balanced tooling.
This 200 mm bore unit is built on a tie-rod construction with a body length A(SCD) of 362 mm and a 29 mm adjustable air cushion at each end. The integrated magnet (suffix -S) lets you clamp CMSG, DMSG or EMSG sensors directly onto the barrel for non-contact end-of-stroke or mid-stroke position feedback without external brackets.
Airtac SCD Standard Cylinder SCD200X250S Technical Specifications
| Model | Airtac SCD Standard Cylinder SCD200X250S |
|---|---|
| Series | SCD double-rod tie-rod cylinder (ISO 6430 class) |
| Bore size | Ø200 mm |
| Rod diameter | Ø40 mm (both ends) |
| Stroke | 250 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 SCD200X250S
| SCD | Double-rod tie-rod cylinder series (rod out both ends). |
|---|---|
| 200 | 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 SCD200X250S Is Used
Dual-Sided Lift & Transfer
The equal 15080 N push/pull force and a rod on both ends let this cylinder drive a lift table or shuttle from either side, keeping acceleration profiles symmetric for heavy pallets or steel sheets.
Rear-Mounted Stroke Sensing
With the built-in magnet, a sensor can be placed on the rear barrel section to detect the piston position even when the front end is buried inside a machine frame, simplifying large-press automation.
Symmetric Clamping Beams
Use the rear rod extension to link a secondary clamping beam, creating a mechanically synchronized, non-rotating press jaw that closes with 15 kN of force on both sides of a large workpiece.
Is the Airtac SCD Standard Cylinder SCD200X250S the Right Cylinder?
Choose the SCD200 when your application needs roughly 15 kN of force each way at 0.5 MPa. If you can work with about 9.4 kN, stepping down to the SCD160 reduces air consumption and weight, while the SCD250 provides 23.5 kN for the most demanding presses or lifting frames. Because this is a double-rod cylinder, it is ideal when you need to mount tooling or a limit-switch dog on the rear rod; if you only need a single working end, the SC single-rod series is a simpler, lower-cost alternative. For a 250 mm stroke on a 200 mm bore, the through-rod design helps share bearing loads, but any significant side force still requires an external guide rail or a dedicated guided cylinder.
As a direct replacement, match an existing SCD200X250S by confirming the 200 mm bore, 250 mm stroke, PT port thread, basic mounting, and the built-in magnet. This model is not dimensionally interchangeable with ISO 15552 profiles; it replaces another AirTAC SCD double-rod unit of the same configuration.
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 SCD200X250S 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 is 21111 N, and at the maximum operating pressure of 0.9 MPa it reaches 27143 N. The theoretical force at 1.0 MPa is 3075 kgf.
Pick the SCD when you need equal force and speed in both directions, or when you plan to attach tooling, a brake, or a position flag to the rear rod. The through-rod also provides better guidance than a single-rod cylinder, though it is not a substitute for an external guide under heavy side loads.
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