Airtac SCD Standard Cylinder SCD125X270
The AirTAC Airtac SCD Standard Cylinder SCD125X270 is a genuine double-acting DOUBLE-ROD air cylinder: the Ø32mm piston rod extends from BOTH end caps, giving equal effective area — and therefore equal force — in push and pull. Ø125mm bore, 270mm stroke, PT1/2 ports and adjustable end cushioning.
- BoreØ125 mm
- Rod (both ends)Ø32 mm
- Stroke270 mm
- Port sizePT1/2
- Rod configDouble rod (through)
- CushionAdjustable, 28 mm
About the Airtac SCD Standard Cylinder SCD125X270
The SCD125X270 is a double-acting, double-rod pneumatic cylinder engineered for applications demanding perfectly symmetrical force and speed in both directions. With a 125 mm bore and a 32 mm through-rod, this model provides an identical 5734 N of thrust on the extend and retract strokes at 0.5 MPa, rising to 10321 N at the maximum operating pressure of 0.9 MPa.
This tie-rod cylinder features a 270 mm stroke, well within its 1500 mm maximum standard limit, and uses PT1/2 ports. The rod protrudes from both end caps, allowing the rear rod to carry a sensor flag, a mechanical stop, or secondary tooling. The body length A(SCD) is 291 mm, and the adjustable air cushion at each end is 28 mm long, providing controlled deceleration without any form of mechanical locking.
Airtac SCD Standard Cylinder SCD125X270 Technical Specifications
| Model | Airtac SCD Standard Cylinder SCD125X270 |
|---|---|
| Series | SCD double-rod tie-rod cylinder (ISO 6430 class) |
| Bore size | Ø125 mm |
| Rod diameter | Ø32 mm (both ends) |
| Stroke | 270 mm |
| Rod configuration | Double rod — rod through both caps |
| Acting type | Double acting |
| Port size | PT1/2 |
| Rod thread | M27×2 |
| 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, 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 (Ø125mm, double rod)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 5734 N | 5734 N |
| 0.7 MPa | 8027 N | 8027 N |
| Max (@1.0 MPa) | 1169 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 SCD125X270
| SCD | Double-rod tie-rod cylinder series (rod out both ends). |
|---|---|
| 125 | Bore size in mm. |
| ×270 | 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 SCD125X270 Is Used
Bidirectional Transfer Shuttles
The equal force and speed in both directions make this cylinder ideal for shuttle tables that move a fixture or pallet between two stations with identical timing and thrust requirements.
Rear-Mounted Stroke Adjustment
The exposed rear rod provides a perfect mounting point for an external mechanical stop or fine-adjustment screw, allowing precise stroke tuning without opening the machine guarding.
Non-Rotating Alignment Tools
With a 32 mm rod supported by bearings in both end caps, this cylinder offers superior resistance to rod deflection, making it suitable for pressing or aligning components where rotation must be minimized.
Is the Airtac SCD Standard Cylinder SCD125X270 the Right Cylinder?
This 125 mm bore model suits medium-to-heavy dual-sided actuation tasks. If your force requirement is lower, stepping down to the SCD100 bore reduces the push-pull force to 3681 N at 0.5 MPa, saving space and air consumption. For higher demands, the SCD160 delivers 9425 N at the same pressure. Always ensure the load is guided externally if side forces are present, as the dual-rod design improves guidance but does not replace a dedicated guided cylinder. A direct replacement must match the 125 mm bore, 270 mm stroke, PT1/2 ports, basic mounting, and the double-rod 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 SCD125X270 FAQ
Because it is a double-rod cylinder, the push and pull forces are identical. At 0.5 MPa it produces 5734 N, at 0.7 MPa it produces 8028 N, and at the maximum operating pressure of 0.9 MPa it delivers 10321 N of force in both directions.
Choose the SCD when your application requires identical force and speed on the extend and retract strokes, or when you need to mount tooling, sensors, or a mechanical stop on the rear rod. The through-rod design also provides better bearing support than a single-rod cylinder, reducing rod deflection.
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