Airtac AIRTAC SC125-160 Standard Cylinder SC125X20TC
The AirTAC Airtac AIRTAC SC125-160 Standard Cylinder SC125X20TC 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 SC125X20TC
The AirTAC SC125X20TC is a double-acting pneumatic cylinder engineered for short-stroke, high-force applications requiring a pivoting mount. With a 125 mm bore and a compact 20 mm stroke, this model generates a substantial 6136 N of push force at an operating pressure of just 0.5 MPa, rising to 11045 N at 0.9 MPa.
This configuration features a centre trunnion (TC) mount, supplied with the TCM1 bracket (part code F-SC125TC), allowing the cylinder to pivot during operation. The 32 mm diameter piston rod with M27x2 thread provides robust strength for heavy pushing tasks, while the adjustable air cushion (28 mm length) decelerates the piston smoothly at the end of its short travel, reducing impact stress.
Airtac AIRTAC SC125-160 Standard Cylinder SC125X20TC Technical Specifications
| Model | Airtac AIRTAC SC125-160 Standard Cylinder SC125X20TC |
|---|---|
| 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 SC125X20TC
| 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 SC125X20TC Is Used
Heavy Part Ejection
The high force from the 125 mm bore at a short 20 mm stroke is ideal for ejecting heavy or stuck parts from a conveyor or die, where a quick, powerful push is needed.
Short-Stroke Pressing
Use this cylinder in a compact press fixture for riveting, staking, or bearing insertion. The centre trunnion mount allows the cylinder body to self-align with the press tooling.
Clamping & Fixturing
Delivers a secure, high-force clamp for welding or machining fixtures. The pivoting action of the TC mount ensures the rod force is applied squarely to the workpiece without binding.
Is the Airtac AIRTAC SC125-160 Standard Cylinder SC125X20TC the Right Cylinder?
Select the SC125X20TC for heavy-duty clamping, pressing, or ejecting tasks where a short linear stroke and a pivoting mount are essential. If your application requires less force, consider stepping down to the 100 mm bore (SC100 series), which provides 3927 N at 0.5 MPa. For longer strokes up to 1500 mm, the SC125 series is also available in standard configurations.
To ensure a correct replacement, match five key points: the 125 mm bore, 20 mm stroke, PT port thread, TC centre trunnion mounting accessory, and the absence of a built-in magnet. This model is a tie-rod cylinder; it 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 SC125X20TC FAQ
At 0.7 MPa operating pressure, the theoretical push force on the piston is 8590 N. The pull force on the retract stroke is 5734 N, accounting for the area of the 32 mm piston rod.
No. The SC125X20TC is a standard double-acting cylinder and will not hold its position if air pressure is lost or the directional valve is centered. The adjustable air cushion only decelerates the piston at the end of stroke. For load holding, you must add an external rod brake or a pilot-operated check valve.
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