Airtac SCD Standard Cylinder SCD125X30
The AirTAC Airtac SCD Standard Cylinder SCD125X30 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, 30mm stroke, PT1/2 ports and adjustable end cushioning.
- BoreØ125 mm
- Rod (both ends)Ø32 mm
- Stroke30 mm
- Port sizePT1/2
- Rod configDouble rod (through)
- CushionAdjustable, 28 mm
About the Airtac SCD Standard Cylinder SCD125X30
The SCD125X30 is a double-acting, double-rod pneumatic cylinder that outputs an identical 5734 N of thrust in both directions at 0.5 MPa, thanks to its through-rod design. With a 32 mm rod protruding from both end caps, it provides symmetric force and speed for precise bidirectional actuation on a compact 30 mm stroke.
This ISO 6430 class tie-rod cylinder features a PT1/2 port and an M27x2 rod thread. Its 28 mm adjustable air cushion decelerates the piston smoothly at each end of travel, protecting the end caps during high-cycle, short-stroke indexing tasks.
Airtac SCD Standard Cylinder SCD125X30 Technical Specifications
| Model | Airtac SCD Standard Cylinder SCD125X30 |
|---|---|
| Series | SCD double-rod tie-rod cylinder (ISO 6430 class) |
| Bore size | Ø125 mm |
| Rod diameter | Ø32 mm (both ends) |
| Stroke | 30 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 SCD125X30
| SCD | Double-rod tie-rod cylinder series (rod out both ends). |
|---|---|
| 125 | Bore size in mm. |
| ×30 | 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 SCD125X30 Is Used
Bidirectional Clamping
The equal 5734 N force in both directions makes the SCD125X30 ideal for symmetrically clamping a workpiece from two sides in a welding or assembly fixture.
Dual-Sided Ejection
Use the front rod to eject a finished part while the rear rod resets a mechanical interlock or stripper plate, all from one compact 30 mm stroke cylinder.
Anti-Rotation Pusher
The dual-rod support provides inherent anti-rotation, allowing the SCD125X30 to push a pallet onto a conveyor without a separate external guide for the short travel.
Is the Airtac SCD Standard Cylinder SCD125X30 the Right Cylinder?
For applications needing more force, the SCD160X30 steps up to 9425 N at 0.5 MPa. If a single-rod SC125X30 is sufficient and only one working end is needed, it offers a higher push force on the full-bore side. To replace an existing SCD125X30, match the bore, 30 mm stroke, PT port thread, basic mounting, and confirm if the original had a magnet option. At this short 30 mm stroke, rod bending is not a concern.
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 SCD125X30 FAQ
Because it is a double-rod cylinder, the push and pull forces are equal. At the standard operating pressure of 0.7 MPa, the force is 8028 N in both directions. The maximum theoretical force at 1.0 MPa is 1169 kgf.
Choose the SCD125 when you need identical force and speed in both directions, or when you need to mount tooling, a sensor flag, or a mechanical stop on the rear rod. The through-rod also provides better guidance than a single-rod cylinder, though it is not a substitute for a fully guided unit under high side loads.
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