Airtac AIRTAC SC125-160 Standard Cylinder SC125X400STC
The AirTAC Airtac AIRTAC SC125-160 Standard Cylinder SC125X400STC is a genuine double-acting standard air cylinder with a Ø125mm bore and 400mm stroke, PT1/2 air ports and adjustable end cushioning. It is used for push, pull, lift and clamp motion in industrial automation.
- BoreØ125 mm
- Stroke400 mm
- Port sizePT1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 28 mm
About the Airtac AIRTAC SC125-160 Standard Cylinder SC125X400STC
The SC125X400STC is a double-acting pneumatic cylinder delivering 6136 N of push force at 0.5 MPa and up to 11045 N at the maximum operating pressure of 0.9 MPa. With a 400 mm stroke, this model is well-suited for medium-reach material handling and pressing tasks requiring substantial force. The 32 mm diameter piston rod and 28 mm adjustable air cushion at each end provide robust guidance and effective end-of-stroke deceleration.
This configuration includes a built-in magnet (-S) for direct mounting of CMSG/DMSG/EMSG sensors, enabling precise position feedback without external brackets. The TC centre trunnion mount (supplied with TCM1 bracket) allows the cylinder to pivot, making it ideal for swinging or articulating loads. As a genuine AirTAC SC series tie-rod cylinder, it offers a compact, shorter body length compared to ISO 15552 designs.
Airtac AIRTAC SC125-160 Standard Cylinder SC125X400STC Technical Specifications
| Model | Airtac AIRTAC SC125-160 Standard Cylinder SC125X400STC |
|---|---|
| Series | SC big-bore tie-rod cylinder (ISO 6430 class) |
| Bore size | Ø125 mm |
| Stroke | 400 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 SC125X400STC
| SC | Standard tie-rod cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×400 | 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 SC125X400STC Is Used
Heavy Part Transfer
The 400 mm stroke and 6136 N push force at 0.5 MPa efficiently shuttle heavy pallets or large components between conveyor lines, with the trunnion mount absorbing any misalignment during the transfer.
Clamping & Fixturing
Delivers up to 11045 N of clamping force at 0.9 MPa for securing large weldments or castings. The built-in magnet allows sensors to confirm full clamp engagement before a cycle starts.
Pivoting Press Mechanism
The TC centre trunnion mount enables the cylinder body to pivot freely, making it perfect for a toggle press or a swinging gate actuator where the rod end follows an arc.
Is the Airtac AIRTAC SC125-160 Standard Cylinder SC125X400STC the Right Cylinder?
When specifying a cylinder for a 400 mm stroke, the SC125 bore provides a significant force step up from the SC100 (3927 N at 0.5 MPa), making it the right choice when the smaller bore cannot meet the load requirement. For strokes of 300 mm or more, always evaluate side-load conditions; an unsupported 32 mm rod extending 400 mm is vulnerable to bending under lateral forces. Use an external guide or linear bearing to protect the rod and seals if side loads are present.
For a direct replacement, match five key points: 125 mm bore, 400 mm stroke, PT port thread, centre trunnion (TC) mounting with the F-SC125TC bracket, and the built-in magnet for sensor compatibility. This cylinder is a tie-rod design and will only interchange directly with another AirTAC SC125 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 SC125X400STC FAQ
At the standard operating pressure of 0.5 MPa, the push force is 6136 N and the pull force is 5734 N. At the maximum operating pressure of 0.9 MPa, the push force increases to 11045 N. The theoretical maximum force at 1.0 MPa is 1251 kgf.
No. The SC125 is a standard double-acting cylinder and will not hold its position when air pressure is exhausted or the directional valve is centered. The adjustable air cushions only decelerate the piston at the end of stroke. For load holding without live pressure, you must add an external rod lock or a pilot-operated check valve.
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