Airtac AIRTAC SC125-160 Standard Cylinder SC125X20H
The AirTAC Airtac AIRTAC SC125-160 Standard Cylinder SC125X20H 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 SC125X20H
The AirTAC SC125X20H is a double-acting tie-rod cylinder with a 125 mm bore and a compact 20 mm stroke, factory-fitted with high-temperature Viton (FKM) seals for reliable operation in ambient temperatures from 0 to +150 °C. It generates a theoretical push force of 6136 N at 0.5 MPa and can reach 11045 N at the maximum operating pressure of 0.9 MPa, making it a powerful actuator for short-throw, high-heat industrial tasks.
This model features a 32 mm piston rod with an M27x2 knuckle thread and PT 1/2 ports. The body length A is 203 mm, giving a total extended length of approximately 223 mm. Its adjustable pneumatic cushion (28 mm length) decelerates the piston at stroke end to reduce impact, and the tie-rod construction allows straightforward maintenance.
Airtac AIRTAC SC125-160 Standard Cylinder SC125X20H Technical Specifications
| Model | Airtac AIRTAC SC125-160 Standard Cylinder SC125X20H |
|---|---|
| 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 SC125X20H
| 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 SC125X20H Is Used
Hot Press Clamping
The 20 mm stroke and Viton seals suit high-temperature clamping fixtures in laminating or thermoforming presses, where ambient heat would degrade standard seals.
Foundry Knockout
Delivers a short, high-force punch to eject castings from moulds. The FKM seals withstand radiant heat found in foundry and die-cast environments.
Autoclave Actuation
Suitable for short-stroke valve or gate actuation inside autoclaves and sterilisation equipment, operating continuously at temperatures up to 150 °C.
Is the Airtac AIRTAC SC125-160 Standard Cylinder SC125X20H the Right Cylinder?
Choose the SC125 bore when your application requires a push force above 5500 N at standard plant pressure, stepping up from the SC100 bore (3927 N at 0.5 MPa). For lighter, faster-cycling loads, the SC100 is a more compact alternative. This 20 mm short-stroke variant is ideal for clamping, pressing, or ejecting where minimal linear travel is needed.
To ensure a correct replacement, match five key points: 125 mm bore, 20 mm stroke, PT port thread, basic mounting (no bracket), and the Viton seal designation (H). The SC series is a tie-rod cylinder and is not dimensionally interchangeable with ISO 15552 profile cylinders; it must replace another AirTAC SC or equivalent tie-rod cylinder of the same configuration.
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 SC125X20H FAQ
At 0.7 MPa supply pressure, the SC125 bore generates a theoretical push force of 8590 N. The pull force on the return stroke is 5734 N, accounting for the 32 mm rod area.
No. The AirTAC SC series is a tie-rod cylinder with a shorter overall body length than an ISO 15552 profile cylinder. It is not dimensionally interchangeable. Use it to replace another AirTAC SC tie-rod cylinder with matching bore, stroke, and mounting.
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