Airtac SAI125 Standard Air Cylinder SAI125BX155S
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125BX155S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 155mm stroke, G1/2 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ125 mm
- Stroke155 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125BX155S
The AirTAC SAI125X155-S is a double-acting ISO 15552 profile cylinder engineered for heavy-duty automation. Delivering a robust push force of 6136 N at 0.5 MPa, this specific 155 mm stroke configuration is a non-standard, made-to-order length tailored for specialized mid-stroke machinery cycles. The extruded aluminum barrel design omits traditional tie-rods, providing a smooth exterior that resists debris accumulation.
Configured with a SUS304 stainless steel rod (material code B), this unit offers superior corrosion resistance for humid or chemically active production settings. The integrated magnet (-S) pairs directly with CMSE or DMSE switches housed in the dual-side sensor grooves. Fluid is controlled via tapered PT ports, and the adjustable air cushions at both ends ensure controlled deceleration of substantial payloads within the 30-500 mm/s speed range.
Airtac SAI125 Standard Air Cylinder SAI125BX155S Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125BX155S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 155 mm |
| Acting type | Double acting |
| Port size | G1/2 |
| 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, 40 mm |
| Max stroke | Up to 1500 mm |
Specifications follow the official AirTAC SAI series datasheet and ISO 15552 dimensions. Confirm against the product label before installation. Port options: G (BSPP) / NPT.
Theoretical Output Force (Ø125mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 6136 N | 5734 N |
| 0.7 MPa | 8590 N | — |
| Max (@1.0 MPa) | 1251 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAI125 Standard Air Cylinder SAI125BX155S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×155 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Related SAI-family variants: SAID (double rod), SAIJ (adjustable stroke), SAIL (with lock), SAIF (with valve), BSAI (enclasp / clamp-lock), and SAI-S with built-in magnet. Rod material: carbon steel (blank) / SUS420J2 (A) / SUS304 (B); seals: TPU (blank) / Viton H / NBR N.
Where the Airtac SAI125 Standard Air Cylinder SAI125BX155S Is Used
Heavy Stamping Presses
Provides the high 6136 N thrust required to actuate heavy stamping and forming dies, while the 155 mm stroke accommodates deep-draw tooling operations.
Pallet Diversion
Drives robust diverters on high-mass pallet conveyors, utilizing the integrated magnet and CMSE sensors to confirm full extension in automated PLC networks.
Large Component Lifts
Lifts heavy metal components or automotive sub-assemblies, relying on the SUS304 rod to prevent corrosion in wash-down or high-humidity factory zones.
Is the Airtac SAI125 Standard Air Cylinder SAI125BX155S the Right Cylinder?
Selecting this 125 mm bore over a smaller 100 mm variant provides a significant leap in thrust, jumping from 3927 N to 6136 N at 0.5 MPa. If your application requires less force, stepping down to the 100 mm bore optimizes air consumption. Because this 155 mm stroke is a non-standard length, ensure your machinery's hard stops and dead volumes are calibrated for this exact extension distance. The dual adjustable air cushions are critical here to absorb the kinetic energy of the large 125 mm piston at the end of travel.
As a true ISO 15552 profile cylinder, it serves as a drop-in replacement for any standard ISO 15552 mounting interface, utilizing standard PT port threads and compatible FA, FB, or TC mounting accessories. Note that this standard cylinder does not hold position when air pressure is lost; if your workflow demands fail-safe load holding without live pressure, specify the SAIL variant with an air-released lock or the BSAI bidirectional clamp-lock cylinder.
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 SAI125 Standard Air Cylinder SAI125BX155S FAQ
At an operating pressure of 0.5 MPa, the 125 mm bore generates a push force of 6136 N and a pull force of 5734 N. At 0.7 MPa, the push force increases to 8590 N.
Yes, the SAI125X155-S is dimensionally interchangeable per ISO 15552 profile standards. It matches standard mounting interfaces and PT port locations, allowing it to drop into existing fixtures designed for ISO 15552 cylinders.
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