Airtac AIRTAC SC125-160 Standard Cylinder SC125X250STC
The AirTAC Airtac AIRTAC SC125-160 Standard Cylinder SC125X250STC is a genuine double-acting standard air cylinder with a Ø125mm bore and 250mm stroke, PT1/2 air ports and adjustable end cushioning. It is used for push, pull, lift and clamp motion in industrial automation.
- BoreØ125 mm
- Stroke250 mm
- Port sizePT1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 28 mm
About the Airtac AIRTAC SC125-160 Standard Cylinder SC125X250STC
The SC125X250STC is a double-acting pneumatic cylinder from the AirTAC SC tie-rod series, combining a 125 mm bore with a 250 mm stroke. At 0.5 MPa it generates 6136 N of push force and 5734 N on the pull stroke, while at the maximum operating pressure of 0.9 MPa the extending thrust reaches 11045 N, placing it firmly in the ISO 6430 class for heavy-duty applications.
This specific configuration ships with a built-in magnet (-S suffix) for direct mounting of CMSG, DMSG, or EMSG sensors, and a centre trunnion mount (-TC suffix) that includes the TCM1 bracket, allowing the cylinder to pivot for swinging loads. The 32 mm diameter piston rod features an M27x2 thread, and the adjustable air cushion provides a 28 mm deceleration zone at each end to manage high inertial loads smoothly.
Airtac AIRTAC SC125-160 Standard Cylinder SC125X250STC Technical Specifications
| Model | Airtac AIRTAC SC125-160 Standard Cylinder SC125X250STC |
|---|---|
| Series | SC big-bore tie-rod cylinder (ISO 6430 class) |
| Bore size | Ø125 mm |
| Stroke | 250 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 SC125X250STC
| SC | Standard tie-rod cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×250 | 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 SC125X250STC Is Used
Heavy Conveyor Diverters
The 11045 N push force at 0.9 MPa drives robust diverter gates and transfer mechanisms on wide conveyor lines, handling pallets or heavy totes with ease.
Clamping & Fixturing
Delivers up to 6136 N at 0.5 MPa for secure workpiece clamping in CNC machining centres and welding fixtures, with magnetic sensors confirming clamp position.
Pivoting Press Unloaders
The centre trunnion mount allows the cylinder to swing freely, making it ideal for actuating pivoting arms that unload parts from stamping or injection moulding presses.
Is the Airtac AIRTAC SC125-160 Standard Cylinder SC125X250STC the Right Cylinder?
Select the SC125 bore when your application needs push force above 6000 N at standard plant air pressure; if 3927 N is sufficient, stepping down to the SC100 bore can reduce size and cost. For strokes longer than 300 mm on this 32 mm rod, evaluate side-load conditions carefully—an external guide rail or a guided cylinder is recommended to protect the rod bearing from bending moments.
When replacing an existing cylinder, match five points exactly: 125 mm bore, 250 mm stroke, PT port thread, centre trunnion (TC) mounting with the F-SC125TC bracket, and the built-in magnet for sensor compatibility. The SC is a tie-rod cylinder 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 SC125X250STC FAQ
At the standard 0.5 MPa operating pressure, push force is 6136 N and pull force is 5734 N. At 0.7 MPa, push force increases to 8590 N. The maximum operating pressure of 0.9 MPa yields 11045 N of push force.
No. The SC125X250STC is a double-acting cylinder and does not lock or hold position when air pressure is removed or the directional valve is centred. If load holding is required in a power-off condition, you must add an external rod brake, a mechanical lock, or a pilot-operated check valve.
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