Airtac SAIJ125 Adjustable Cylinder SAIJ125AX225-100
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX225-100 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 225mm 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
- Stroke225 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX225-100
The AirTAC SAIJ125X225-100 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, delivering 6136N of push force at 0.5 MPa. Its 100mm adjustment screw allows you to trim the 225mm nominal stroke back, creating a precise 125-225mm usable travel window for fine-tuning end positions during commissioning. This cylinder features a SUS420J2 stainless steel rod (code A) for enhanced corrosion resistance and uses PT tapered port threads.
Because the rear adjuster acts strictly as a mechanical stop and does not lock the load, live air must be maintained to hold position. The extruded aluminum barrel includes sensor grooves on both sides, and the recommended operating speed is 30-500mm/s. It supports variable air cushions at both ends to manage deceleration across the adjustable range.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX225-100 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX225-100 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 225 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 SAIJ125AX225-100
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×225 | 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 SAIJ125AX225-100 Is Used
Variable End-Stop Positioning
Dial in the exact retract distance between 125 and 225mm on packaging equipment to accommodate different carton depths without changing hardware.
Machine Changeover Calibration
Quickly reconfigure the stroke limit on heavy material handling lines during product family transitions using the 100mm adjustment screw.
Heavy Forming Setup
Leverage the 6136N push force at 0.5MPa to securely press components while fine-tuning the bottoming position during initial commissioning.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX225-100 the Right Cylinder?
Choose this 125mm bore when an application requires substantial force, stepping up from an 80mm bore that provides 2513N push at 0.5 MPa. The 100mm adjustment range is ideal for machinery requiring significant product-size changeovers without swapping cylinders, contrasting with a fixed-stroke SAI model. To replace an ISO 15552 cylinder, match the 125mm bore, 225mm stroke, PT port threads, and mounting style.
For any stroke at or above 300mm, an external guide is recommended to manage side loads, though this 225mm unit relies on its 32mm rod and M27x2 thread for robust load transmission. If the setup requires true load holding without continuous air pressure, integrate an external pilot-operated check valve or select an AirTAC SAIL or BSAI cylinder instead of relying on the adjuster.
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 SAIJ125AX225-100 FAQ
The rear adjuster acts as a mechanical stop that lets you shorten the 225mm nominal stroke by up to 100mm, providing an effective travel window of 125 to 225mm. It only sets the end position and does not lock the load without live air pressure.
At 0.5 MPa operating pressure, it provides 6136N of push force and 5734N of pull force. At 0.7 MPa, the push force increases to 8590N.
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