Airtac AIRTAC SC125-160 Standard Cylinder SC125X40S
The AirTAC Airtac AIRTAC SC125-160 Standard Cylinder SC125X40S is a genuine double-acting standard air cylinder with a Ø125mm bore and 40mm stroke, PT1/2 air ports and adjustable end cushioning. It is used for push, pull, lift and clamp motion in industrial automation.
- BoreØ125 mm
- Stroke40 mm
- Port sizePT1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 28 mm
About the Airtac AIRTAC SC125-160 Standard Cylinder SC125X40S
The SC125X40S is a double-acting pneumatic cylinder delivering 6136 N push force at 0.5 MPa (11045 N at 0.9 MPa) in a compact 40 mm stroke. This ISO 6430 class big-bore cylinder uses a 32 mm rod with M27x2 threads and PT1/2 ports, making it a robust actuator for short, high-force clamping or pressing tasks.
The built-in magnet (-S suffix) allows direct mounting of CMSG/DMSG/EMSG reed or solid-state sensors on the tie-rod barrel for non-contact position sensing. With a body length A of 203 mm and 28 mm adjustable air cushion, it decelerates loads quietly even at the 30-500 mm/s speed range typical for this bore class.
Airtac AIRTAC SC125-160 Standard Cylinder SC125X40S Technical Specifications
| Model | Airtac AIRTAC SC125-160 Standard Cylinder SC125X40S |
|---|---|
| Series | SC big-bore tie-rod cylinder (ISO 6430 class) |
| Bore size | Ø125 mm |
| Stroke | 40 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 SC125X40S
| SC | Standard tie-rod cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×40 | 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 SC125X40S Is Used
Heavy-Duty Clamping
The 6136 N push force at 0.5 MPa and short 40 mm stroke make it ideal for pneumatic clamps and holding fixtures in welding or machining cells, with sensor confirmation via the built-in magnet.
Press-Fit Assembly
Delivers over 11000 N at 0.9 MPa for pressing bearings, bushings, or pins. The adjustable cushion protects tooling at the end of the short, forceful stroke.
Diverter Gate Actuator
Quick 40 mm throw for diverting heavy packages or pallets on a conveyor line. The -S magnet allows end-of-stroke sensors to confirm gate position for interlocked control.
Is the Airtac AIRTAC SC125-160 Standard Cylinder SC125X40S the Right Cylinder?
For a higher force at the same pressure, step up to the SC160 (10053 N at 0.5 MPa); for a lighter, faster option, the SC100 provides 3927 N. This short 40 mm stroke is well within the 1500 mm maximum standard stroke for bore 125. For side-load applications, even short strokes benefit from an external guide or rod support to protect the 32 mm rod bearing.
To ensure a drop-in replacement, match five points: 125 mm bore, 40 mm stroke, PT1/2 ports, the built-in magnet (-S), and the basic mounting style. 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 SC125X40S FAQ
At the standard 0.5 MPa operating pressure, push force is 6136 N and pull force is 5734 N. At the maximum operating pressure of 0.9 MPa, push force reaches 11045 N. The theoretical maximum at 1.0 MPa is 1251 kgf.
No. The SC125X40S is a double-acting cylinder and will drift or drop if pressure is lost or the directional valve is centered. For load holding without live pressure, you must add a pilot-operated check valve or an external mechanical rod lock.
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