Airtac AIRTAC SC125-160 Standard Cylinder SC125X20
The AirTAC Airtac AIRTAC SC125-160 Standard Cylinder SC125X20 is a genuine double-acting standard air cylinder with a Ø125mm bore and 20mm stroke, PT1/2 air ports and adjustable end cushioning. It is used for push, pull, lift and clamp motion in industrial automation.
- BoreØ125 mm
- Stroke20 mm
- Port sizePT1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 28 mm
About the Airtac AIRTAC SC125-160 Standard Cylinder SC125X20
The SC125X20 is a heavy-duty tie-rod cylinder delivering a substantial 6136 N push force at 0.5 MPa, ideal for short-stroke clamping and positioning tasks. Its 32 mm diameter piston rod and 28 mm adjustable air cushion absorb impact energy effectively, even in compact 20 mm stroke applications.
With a body length A of 203 mm, this double-acting cylinder provides a rigid, repeatable linear motion solution. The PT1/2 ports ensure straightforward pneumatic connections, while the -20 to +70 °C TPU seals offer reliable performance in standard factory air conditions.
Airtac AIRTAC SC125-160 Standard Cylinder SC125X20 Technical Specifications
| Model | Airtac AIRTAC SC125-160 Standard Cylinder SC125X20 |
|---|---|
| Series | SC big-bore tie-rod cylinder (ISO 6430 class) |
| Bore size | Ø125 mm |
| Stroke | 20 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 SC125X20
| SC | Standard tie-rod cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×20 | 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 SC125X20 Is Used
Heavy-Duty Clamping
The 6136 N force at 0.5 MPa makes this cylinder perfect for powerful, short-stroke clamping fixtures on welding or machining stations.
Part Ejection
Use the rapid 20 mm stroke to eject heavy parts from a conveyor or stamping die, leveraging the high push force for reliable separation.
Precision Positioning Stop
Deploy as a robust, repeatable end-stop or locating pin actuator in assembly jigs, where a short, controlled movement is essential.
Is the Airtac AIRTAC SC125-160 Standard Cylinder SC125X20 the Right Cylinder?
For applications needing more force, step up to the 160 mm bore which provides 10053 N at 0.5 MPa; for a lighter, faster actuator, the 100 mm bore offers 3927 N. This 20 mm stroke is well within standard limits, but always ensure the load is guided to prevent side-load damage to the rod bearing.
When replacing, match five points exactly: 125 mm bore, 20 mm stroke, PT1/2 port thread, basic mounting, and the absence of a magnet. This SC model is a tie-rod design and is not dimensionally interchangeable with ISO 15552 profile cylinders.
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 SC125X20 FAQ
At 0.5 MPa, the push force is 6136 N. At the maximum operating pressure of 0.9 MPa, the force reaches 11045 N. The theoretical maximum at 1.0 MPa is 1251 kgf.
No. The SC125X20 is a double-acting cylinder and will not hold its position when air pressure is exhausted or lost. For load-holding applications, you must add an external rod brake, a mechanical lock, or a pilot-operated check valve in the circuit.
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