Airtac SAI125 Standard Air Cylinder SAI125X55
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125X55 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 55mm 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
- Stroke55 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125X55
The AirTAC SAI125X55 is a double-acting ISO 15552 profile cylinder engineered for heavy-duty operations, delivering 6136 N of push force at 0.5 MPa. Its 55 mm stroke is a non-standard, made-to-order dimension tailored for short-travel, high-thrust tasks. The extruded aluminum barrel omits tie-rods, presenting a clean profile that complies with strict ISO 15552 mounting dimensions.
This specific configuration utilizes a standard carbon steel piston rod and PT (tapered) port threads. While the unit lacks a standard magnet for proximity sensing, the barrel retains dual-sided sensor grooves ready to accept CMSE or DMSE switches if a magnet-equipped variant is specified later.
Airtac SAI125 Standard Air Cylinder SAI125X55 Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125X55 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 55 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 SAI125X55
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×55 | 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 SAI125X55 Is Used
Heavy Stamping
Provides the robust 6136 N force needed to seat bearings or stamp thick metal plates within a short 55 mm travel.
Pallet Halting
Acts as a high-power stopper for heavy pallets on assembly lines, using its 125 mm bore to absorb substantial kinetic energy.
Industrial Clamping
Secures large welded frames or heavy cast components during machining operations without requiring excessive stroke length.
Is the Airtac SAI125 Standard Air Cylinder SAI125X55 the Right Cylinder?
Selecting this 125 mm bore over the smaller 100 mm version upgrades your thrust from 3927 N to 6136 N at 0.5 MPa, whereas stepping up to the 160 mm bore yields 10053 N. The 55 mm stroke is ideal when compact retraction is required without sacrificing high clamping power.
Because the SAI125X55 is double-acting, it relies on continuous air pressure to maintain its position. If your workflow demands fail-safe load holding upon pressure loss, consider the SAIL variant with an air-released lock or the BSAI bidirectional clamp-lock cylinder. This model mounts via standard ISO 15552 accessories like TC trunnions or FA flanges.
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 SAI125X55 FAQ
At an operating pressure of 0.5 MPa, this 125 mm bore cylinder generates 6136 N of push force and 5734 N of pull force.
Yes, the SAI125X55 is dimensionally interchangeable per ISO 15552 standards, serving as a drop-in replacement for other ISO 15552 profile cylinders with matching G1/2 ports and 125 mm bore.
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