Airtac AIRTAC SC125-160 Standard Cylinder SC125X420S
The AirTAC Airtac AIRTAC SC125-160 Standard Cylinder SC125X420S is a genuine double-acting standard air cylinder with a Ø125mm bore and 420mm stroke, PT1/2 air ports and adjustable end cushioning. It is used for push, pull, lift and clamp motion in industrial automation.
- BoreØ125 mm
- Stroke420 mm
- Port sizePT1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 28 mm
About the Airtac AIRTAC SC125-160 Standard Cylinder SC125X420S
The AirTAC SC125X420S is a double-acting tie-rod cylinder delivering a substantial 6136 N of push force at 0.5 MPa (11045 N at the maximum operating pressure of 0.9 MPa). With a 420 mm stroke and a 32 mm diameter piston rod, this model is built for demanding linear applications requiring high force and moderate travel.
This variant includes a built-in magnet (-S suffix), allowing direct mounting of CMSG, DMSG, or EMSG reed and solid-state sensors along the barrel for precise, non-contact position feedback. The cylinder operates on filtered air from 0.15 to 1.0 MPa, features an adjustable pneumatic cushion (28 mm length) to decelerate the piston smoothly, and has a PT1/2 port thread. Its body length A is 203 mm, making it a compact high-force actuator within the ISO 6430 class.
Airtac AIRTAC SC125-160 Standard Cylinder SC125X420S Technical Specifications
| Model | Airtac AIRTAC SC125-160 Standard Cylinder SC125X420S |
|---|---|
| Series | SC big-bore tie-rod cylinder (ISO 6430 class) |
| Bore size | Ø125 mm |
| Stroke | 420 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 SC125X420S
| SC | Standard tie-rod cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×420 | 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 SC125X420S Is Used
Palletizing & Depalletizing
The high force and 420 mm stroke are ideal for lifting and positioning heavy pallets or layers of goods in automated end-of-line packaging systems.
Heavy-Duty Clamping
Use the 11045 N max force for secure clamping of large fabrications or castings during machining or welding, with sensor confirmation of the clamped state.
Logistics Sortation Pushers
Powerful enough to divert heavy packages or tires on high-speed conveyors, with the built-in magnet providing reliable end-of-stroke detection for sequencing.
Is the Airtac AIRTAC SC125-160 Standard Cylinder SC125X420S the Right Cylinder?
Select the SC125 bore when your application requires a push force between 6136 N and 11045 N. If your load is slightly lower, the SC100 bore provides 3927 N at 0.5 MPa in a smaller footprint. For a 420 mm stroke, ensure the rod is protected from side loads; at this extension, an external guide rail or a guided cylinder configuration is strongly recommended to prevent rod bending and premature bearing wear. When replacing an existing cylinder, match five key points: 125 mm bore, 420 mm stroke, PT1/2 port thread, the basic mounting (no integral bracket), and the presence of a magnet for sensors.
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 SC125X420S FAQ
At the standard 0.5 MPa operating pressure, 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 increases to 11045 N. The theoretical maximum force at 1.0 MPa is 1251 kgf.
Yes. The -S suffix in the model code SC125X420S indicates a built-in magnet is installed on the piston. This allows you to clamp AirTAC CMSG, DMSG, or EMSG sensors directly onto the cylinder's tie-rod barrel for contactless position sensing without any additional brackets.
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