Airtac AIRTAC SC125-160 Standard Cylinder SC125X425
The AirTAC Airtac AIRTAC SC125-160 Standard Cylinder SC125X425 is a genuine double-acting standard air cylinder with a Ø125mm bore and 425mm stroke, PT1/2 air ports and adjustable end cushioning. It is used for push, pull, lift and clamp motion in industrial automation.
- BoreØ125 mm
- Stroke425 mm
- Port sizePT1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 28 mm
About the Airtac AIRTAC SC125-160 Standard Cylinder SC125X425
The SC125X425 is a double-acting pneumatic cylinder from the AirTAC SC tie-rod series, delivering a substantial push force of 6136 N at 0.5 MPa (11045 N at the 0.9 MPa maximum operating pressure). Its 32 mm diameter piston rod and 28 mm adjustable air cushion are built for heavy industrial moves, making this 425 mm stroke unit a workhorse for pressing, clamping, and lifting applications.
With a body length A of 203 mm, the total extended length reaches approximately 628 mm. The cylinder operates on 40 µm filtered air from 0.15 to 1.0 MPa and uses standard PT ports (PT1/2) with an M27x2 rod thread. As an ISO 6430 class cylinder, it is designed for a controlled speed range of 30-500 mm/s.
Airtac AIRTAC SC125-160 Standard Cylinder SC125X425 Technical Specifications
| Model | Airtac AIRTAC SC125-160 Standard Cylinder SC125X425 |
|---|---|
| Series | SC big-bore tie-rod cylinder (ISO 6430 class) |
| Bore size | Ø125 mm |
| Stroke | 425 mm |
| 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 SC series datasheet. Operating pressure 0.15–1.0 MPa, proof pressure 1.5 MPa, temperature −20 to +70 °C. Confirm against the product label before installation. Thread options: PT (standard) / G.
Theoretical Output Force (Ø125mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 6136 N | 5734 N |
| 0.7 MPa | 8590 N | — |
| Max (approx.) | 1251 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac AIRTAC SC125-160 Standard Cylinder SC125X425
| SC | Standard tie-rod cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×425 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Related variants: SCD (double rod), SCJ (adjustable stroke), SCT (multi-position). Seals: TPU standard / H = Viton / N = NBR. Thread: blank = PT, G = G thread.
Where the Airtac AIRTAC SC125-160 Standard Cylinder SC125X425 Is Used
Heavy Press & Assembly
The 11045 N thrust at 0.9 MPa powers assembly presses, riveting stations, and bearing insertion tools, providing the high force needed for interference fits.
Palletising & Transfer
With a 425 mm stroke, this cylinder handles pallet layer forming and heavy product transfer, pushing or lifting large cartons across roller conveyors.
Clamping & Fixturing
Delivers rigid, high-force clamping for large weld fixtures and machining centres, holding heavy workpieces securely during automated cutting or welding cycles.
Is the Airtac AIRTAC SC125-160 Standard Cylinder SC125X425 the Right Cylinder?
Select the SC125 when your application demands force in the 6000 N class at standard plant pressure. If your load calculation falls closer to 4000 N, stepping down to an SC100 (3927 N push at 0.5 MPa) can reduce air consumption and physical size. For strokes of 425 mm, always evaluate side-loading: a long, unsupported 32 mm rod can bend under lateral force. Use an external guide rail or a guided cylinder unit if the load is not perfectly axial.
To replace an existing cylinder, match five points: 125 mm bore, 425 mm stroke, PT1/2 port thread, the specific mounting accessory (this basic model has none), and the magnet option (this unit has no built-in magnet).
Quick checklist
- ✓ Required force at your working pressure
- ✓ Stroke and mounting space
- ✓ Port/thread type (PT/NPT/G)
- ✓ Magnet (-S) for sensors?
- ✓ Side load — consider a guided cylinder
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Avoid side load on the piston rod.
- check Adjust end cushion screws for smooth stops.
- check Use correct mounting accessory (FA/FB/CA/CB/LB/TC).
- check Installation by qualified personnel per AirTAC docs.
Airtac AIRTAC SC125-160 Standard Cylinder SC125X425 FAQ
At 0.5 MPa, the push force is 6136 N and the pull force is 5734 N. At the maximum operating pressure of 0.9 MPa, the push force reaches 11045 N. The theoretical maximum at 1.0 MPa is 1251 kgf.
No. The SC125X425 is a standard double-acting cylinder and will drift or drop if pressure is exhausted. The adjustable air cushion only decelerates the piston at stroke end—it does not lock or hold the load. For load holding, add a pilot-operated check valve or an external rod brake.
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