Airtac SAI125 Standard Air Cylinder SAI125BX220
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125BX220 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 220mm 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
- Stroke220 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125BX220
The AirTAC SAI125X220 is a double-acting ISO 15552 profile cylinder engineered for heavy-duty automation. It delivers a substantial push force of 6136 N at 0.5 MPa, making it well-suited for high-thrust pressing and heavy load manipulation over its 220 mm stroke. The extruded aluminum barrel design ensures rigid alignment without the need for external tie rods.
This specific configuration is built with a SUS304 stainless steel piston rod (material code B) for superior corrosion resistance in harsh environments. It utilizes PT tapered port threads and operates without a magnet. For applications requiring end-position holding under pressure loss, consider the SAIL variant equipped with an air-released lock.
Airtac SAI125 Standard Air Cylinder SAI125BX220 Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125BX220 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 220 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 SAI125BX220
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×220 | 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 SAI125BX220 Is Used
Heavy-Duty Stamping
Provides the robust 6136 N output force required to form, stamp, and seat large metal or heavy plastic components in automated press lines.
Injection Mold Extraction
The SUS304 stainless rod offers excellent moisture resistance for safely extracting large molded parts from humid injection molding environments.
Pallet Diverting
Generates enough linear thrust to divert or stop fully loaded heavy-duty pallets along high-throughput material handling conveyors.
Is the Airtac SAI125 Standard Air Cylinder SAI125BX220 the Right Cylinder?
Select this 125 mm bore when a 100 mm cylinder's 3927 N push force at 0.5 MPa is insufficient for your heavy lifting requirements. Conversely, if your application does not demand this level of thrust, stepping down to an 80 mm bore (2513 N at 0.5 MPa) can reduce air consumption and cycle times.
Because the 220 mm stroke is below the 300 mm threshold, side-load stress on the rod bearing is moderate, but proper load alignment remains essential. Note that a standard SAI cylinder relies on adjustable air cushions at both ends to decelerate the piston; it does not hold position pneumatically. If your system requires positive load holding when air is exhausted, integrate an external pilot-operated check valve or select the BSAI clamp-lock series. This model serves as a direct dimensional drop-in replacement for any ISO 15552 cylinder with matching 125 mm bore, 220 mm stroke, G1/2 port, and compatible mounting accessories.
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 SAI125BX220 FAQ
At 0.5 MPa operating pressure, this 125 mm bore cylinder provides 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 SAI125X220 is dimensionally interchangeable per ISO 15552. You can use it as a drop-in replacement for other ISO 15552 profile cylinders with the same 125 mm bore, 220 mm stroke, and G1/2 port size.
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