Airtac SCD Standard Cylinder SCD100X250
The AirTAC Airtac SCD Standard Cylinder SCD100X250 is a genuine double-acting DOUBLE-ROD air cylinder: the Ø25mm piston rod extends from BOTH end caps, giving equal effective area — and therefore equal force — in push and pull. Ø100mm bore, 250mm stroke, PT1/2 ports and adjustable end cushioning.
- BoreØ100 mm
- Rod (both ends)Ø25 mm
- Stroke250 mm
- Port sizePT1/2
- Rod configDouble rod (through)
- CushionAdjustable, 29 mm
About the Airtac SCD Standard Cylinder SCD100X250
The SCD100X250 is a double-acting pneumatic cylinder with a through-rod design, meaning the 25 mm piston rod extends from both ends of the body. This configuration gives you identical push and pull force in both directions—3681 N at 0.5 MPa—because the rod area is subtracted from the piston on both sides. The 100 mm bore body has a retracted length of 263 mm (dimension A) and uses a PT1/2 port for air supply.
With a 250 mm stroke, this cylinder is well-suited for tasks requiring symmetric motion, like operating two fixtures from a single actuator or using the rear rod as a mounting point for a sensor flag. The adjustable air cushion at each end, with a 29 mm cushion length, decelerates the piston smoothly to reduce end-of-stroke impact. This model is a genuine AirTAC tie-rod cylinder, built for reliable industrial pneumatic service.
Airtac SCD Standard Cylinder SCD100X250 Technical Specifications
| Model | Airtac SCD Standard Cylinder SCD100X250 |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø100 mm |
| Rod diameter | Ø25 mm (both ends) |
| Stroke | 250 mm |
| Rod configuration | Double rod — rod through both caps |
| Acting type | Double acting |
| Port size | PT1/2 |
| Rod thread | M20×1.5 |
| 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, 29 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 (Ø100mm, double rod)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 3682 N | 3682 N |
| 0.7 MPa | 5154 N | 5154 N |
| Max (@1.0 MPa) | 751 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 SCD100X250
| SCD | Double-rod tie-rod cylinder series (rod out both ends). |
|---|---|
| 100 | 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 SCD100X250 Is Used
Dual-Sided Transfer Shuttle
The rod extending from both ends allows a single SCD100X250 to push a pallet into a station and simultaneously pull the next one into position, simplifying the design of a reciprocating transfer shuttle.
Non-Rotating Pusher
With two rod ends supported, the SCD100X250 provides better resistance to rod rotation than a single-rod cylinder, making it a solid choice for a simple pusher where adding an external anti-rotate guide is not feasible.
Synchronized Dual-Tool Actuation
Mount a stamping head on the front rod and a stripping plate on the rear rod. The SCD100X250's equal 3681 N force in both directions ensures both tools operate with the same power from one air circuit.
Is the Airtac SCD Standard Cylinder SCD100X250 the Right Cylinder?
This SCD100X250 is the right choice when you need balanced force output in a compact footprint. If your application requires more thrust, stepping up to the SCD125 bore provides 5734 N of force each way at 0.5 MPa. Conversely, if 3681 N exceeds your needs, the SCD80 bore offers 2268 N in a lighter, smaller package. For applications where force is only needed in one direction, a single-rod SC series cylinder is a more economical and standard choice.
At a 250 mm stroke, the unsupported rod length is manageable, but for strokes of 300 mm or more, you must evaluate side loading and potential rod buckling. An external guide rail or a switch to a guided cylinder is recommended for longer strokes to protect the rod bearings. As a direct replacement, match this model's 100 mm bore, 250 mm stroke, PT port thread, basic mounting style, and lack of a magnet to another AirTAC SCD100X250.
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 SCD100X250 FAQ
Because it is a double-rod cylinder, the push and pull forces are identical. At 0.5 MPa, it outputs 3681 N in both directions. The force increases to 5153 N at 0.7 MPa and 6626 N at the maximum operating pressure of 0.9 MPa.
Choose the SCD when you need equal force and speed in both directions, or when you need to attach tooling, a stop, or a position sensor to the rear rod. The through-rod design also provides better support for the piston, reducing uneven bearing wear, though it is not a replacement for a fully guided cylinder under high side loads.
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