Airtac SAIJ125 Adjustable Cylinder SAIJ125AX550-10
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX550-10 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 550mm 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
- Stroke550 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX550-10
The AirTAC SAIJ125X550-10 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It delivers a robust 8590N push force at 0.7 MPa and provides a usable travel window of 540 to 550 mm, letting you dial in the exact end position without swapping out the actuator. The extruded aluminum barrel includes sensor grooves on both sides for flexible mounting of CMSE or DMSE electronic sensors.
This model uses a SUS420J2 stainless steel piston rod (material code A) for enhanced durability against moisture and light corrosion. It features PT tapered port threads (G1/2) and operates at speeds of 30-500 mm/s. The rear adjustment screw acts purely as a mechanical stop to set the travel end, meaning it cannot hold a load without live air pressure.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX550-10 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX550-10 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 550 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 SAIJ125 Adjustable Cylinder SAIJ125AX550-10
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×550 | 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 SAIJ125 Adjustable Cylinder SAIJ125AX550-10 Is Used
Heavy Press Tuning
Dial in the exact 540-550mm end position for heavy pressing applications, ensuring precise material deformation without over-traveling.
Product Changeover
Quickly adjust the rear stop screw by up to 10mm when switching product sizes on the line, minimizing mechanical retooling time.
Automated Assembly
Leverage the 8590N thrust and SUS420J2 stainless rod to drive large assembly tooling, fine-tuning the final stroke position during commissioning.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX550-10 the Right Cylinder?
Choose this 125mm bore when you need heavy thrust beyond the 5497N push force of a 100mm cylinder, but do not require the massive 14074N output of the 160mm class. The 10mm adjustable window is ideal for fine-tuning end stops during machine commissioning or product changeover, saving the downtime of adding external physical stops. Because the stroke is 550mm, you must use an external guide to prevent excessive side-loading on the rod.
To match this ISO 15552 dimensionally interchangeable cylinder, specify: 125mm bore, 550mm stroke, 10mm adjustment, PT G1/2 port, and no magnet (-S). It supports a reduced mounting set of Basic, FA, LB, TC, FTC, TCM1, and TCM2. For load-holding without live pressure, select the SAIL or BSAI series instead, as the SAIJ adjuster is only a stop.
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 SAIJ125 Adjustable Cylinder SAIJ125AX550-10 FAQ
At an operating pressure of 0.7 MPa, this 125mm bore double-acting cylinder generates a push force of 8590N and a pull force of 5734N.
The rear adjuster screw acts as a mechanical stop, allowing you to trim the effective travel back by up to 10mm, creating a 540-550mm usable window. It only sets the end position and does not lock the load without live air.
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Standard models usually ship in 3-4 days.
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