Airtac AIRTAC SC125-160 Standard Cylinder SC125X850H
The AirTAC Airtac AIRTAC SC125-160 Standard Cylinder SC125X850H is a genuine double-acting standard air cylinder with a Ø125mm bore and 850mm stroke, PT1/2 air ports and adjustable end cushioning. It is used for push, pull, lift and clamp motion in industrial automation.
- BoreØ125 mm
- Stroke850 mm
- Port sizePT1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 28 mm
About the Airtac AIRTAC SC125-160 Standard Cylinder SC125X850H
The SC125X850H is a double-acting pneumatic cylinder delivering 6136 N of push force at 0.5 MPa and up to 11045 N at the maximum operating pressure of 0.9 MPa. With an 850 mm stroke and a 32 mm diameter piston rod, this model is built for heavy linear actuation tasks that require both substantial force and a long working reach.
This variant is fitted with high-temperature Viton (FKM) seals, extending the operating temperature range to 0–150°C, making it suitable for autoclaves, foundries, and other hot-zone applications. As an ISO 6430 class tie-rod cylinder, it features a 28 mm adjustable air cushion and a PT1/2 port for reliable speed control.
Airtac AIRTAC SC125-160 Standard Cylinder SC125X850H Technical Specifications
| Model | Airtac AIRTAC SC125-160 Standard Cylinder SC125X850H |
|---|---|
| Series | SC big-bore tie-rod cylinder (ISO 6430 class) |
| Bore size | Ø125 mm |
| Stroke | 850 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 SC125X850H
| SC | Standard tie-rod cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×850 | 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 SC125X850H Is Used
High-Temperature Process Automation
The Viton seals enable reliable operation in ovens, autoclaves, and steam-assisted processes up to 150°C, where standard seals would degrade rapidly.
Heavy Press & Clamping Fixtures
With 11045 N of force at 0.9 MPa, this cylinder powers large welding jigs, forming presses, and industrial clamping systems requiring a long 850 mm stroke.
Hot-Material Handling Gates
Controls diverter gates or chutes for hot aggregates, asphalt, or glass cullet, where the ambient temperature demands FKM seals and robust tie-rod construction.
Is the Airtac AIRTAC SC125-160 Standard Cylinder SC125X850H the Right Cylinder?
Select the SC125 bore when your application needs between 6136 N and 11045 N of force. If your load requires less, stepping down to an SC100 bore provides 3927 N at 0.5 MPa in a lighter package. For a stroke of 850 mm, carefully evaluate side-loading conditions; a 32 mm rod extending this far is vulnerable to bending under misalignment. Use an external guide rail or a guided cylinder assembly to protect the rod bearings and ensure long service life.
For a direct replacement, match five key points: 125 mm bore, 850 mm stroke, PT1/2 port thread, basic mounting style, and the absence of a built-in magnet. The Viton seal variant is specifically for high-temperature environments and is not interchangeable with standard TPU-seal models in cold-storage applications.
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 SC125X850H FAQ
At 0.7 MPa (7 bar), the push force is 8590 N. The maximum push force at the 0.9 MPa operating limit is 11045 N. The theoretical force at 1.0 MPa is 1251 kgf.
Yes, the 'H' suffix designates Viton seals, which are the only difference from a standard SC125X850. It is a direct dimensional match but allows continuous operation from 0°C up to 150°C, whereas the standard TPU seal is limited to -20–70°C.
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