Airtac AIRTAC SC125-160 Standard Cylinder SC125X550STC
The AirTAC Airtac AIRTAC SC125-160 Standard Cylinder SC125X550STC is a genuine double-acting standard air cylinder with a Ø125mm bore and 550mm stroke, PT1/2 air ports and adjustable end cushioning. It is used for push, pull, lift and clamp motion in industrial automation.
- BoreØ125 mm
- Stroke550 mm
- Port sizePT1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 28 mm
About the Airtac AIRTAC SC125-160 Standard Cylinder SC125X550STC
The SC125X550STC is a large-bore double-acting pneumatic cylinder delivering substantial force for heavy industrial automation. At the standard 0.7 MPa operating pressure, it generates 8590 N of push force, rising to a maximum of 11045 N at 0.9 MPa, driven by a robust 32 mm diameter piston rod.
This 125 mm bore, 550 mm stroke configuration features a built-in magnet (S) for direct mounting of CMSG/DMSG/EMSG sensors, and a centre trunnion (TC) mount with the TCM1 bracket for pivoting applications. The adjustable air cushion (28 mm length) decelerates the piston smoothly, protecting the end caps during high-speed cycles.
Airtac AIRTAC SC125-160 Standard Cylinder SC125X550STC Technical Specifications
| Model | Airtac AIRTAC SC125-160 Standard Cylinder SC125X550STC |
|---|---|
| Series | SC big-bore tie-rod cylinder (ISO 6430 class) |
| Bore size | Ø125 mm |
| Stroke | 550 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 SC125X550STC
| SC | Standard tie-rod cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×550 | 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 SC125X550STC Is Used
Pallet Lift & Transfer
Provides the high force needed to lift heavy pallets or transfer loads between conveyor lines, with the trunnion mount allowing the cylinder to pivot as it strokes.
Heavy-Duty Clamping
Delivers up to 11045 N of clamping force for welding fixtures or CNC machining, with magnetic sensors confirming jaw position for safety interlocks.
Forestry & Ag Equipment Actuation
Suited for log splitters or chute rotators where high thrust and a pivoting trunnion mount are standard requirements in mobile hydraulic-replacement circuits.
Is the Airtac AIRTAC SC125-160 Standard Cylinder SC125X550STC the Right Cylinder?
Select the SC125 for tasks requiring force in the 6000-11000 N class. If your load is lighter, stepping down to the SC100 bore reduces push force to 3927 N at 0.5 MPa, saving energy and space. For higher forces, the SC160 bore offers 18095 N at 0.9 MPa.
At this 550 mm stroke, the 32 mm rod is strong, but any significant side load requires an external guide or a guided cylinder to prevent rod bending and premature bearing wear. For replacement, match five points exactly: 125 mm bore, 550 mm stroke, PT port thread, centre trunnion (TC) mounting with F-SC125TC bracket, and the built-in magnet (-S) for sensor compatibility.
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 SC125X550STC FAQ
At 0.5 MPa it produces 6136 N, at 0.7 MPa it reaches 8590 N, and at the maximum operating pressure of 0.9 MPa it delivers 11045 N of push force. The theoretical maximum at 1.0 MPa is 1251 kgf.
No, the SC125 is a standard double-acting cylinder and will drift or drop if pressure is exhausted. To hold a position without live pressure, you must add a pilot-operated check valve or an external mechanical rod lock.
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