Airtac SAIJ125 Adjustable Cylinder SAIJ125AX900-75
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX900-75 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 900mm 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
- Stroke900 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX900-75
The AirTAC SAIJ125X900-75 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a 900 mm nominal stroke that can be dialed back by up to 75 mm, yielding a usable travel window of 825-900 mm for fine-tuning end positions during commissioning. Delivering 8590 N of pull force at 0.7 MPa, it handles heavy loads while utilizing a SUS420J2 stainless steel rod for enhanced durability against side-load wear.
This adjustable model uses a PT tapered port thread and operates at speeds of 30-500 mm/s. The extruded aluminum barrel includes sensor grooves on both sides for flexible mounting of CMSE reed or DMSE solid-state switches. The rear adjuster acts purely as a mechanical stop to set the travel end, meaning it will not hold the load dynamically without live air pressure.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX900-75 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX900-75 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 900 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 SAIJ125AX900-75
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×900 | 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 SAIJ125AX900-75 Is Used
Product Changeover
Dial the stroke back by up to 75 mm to quickly adapt machinery for different packaging formats without changing the cylinder.
Heavy Press Positioning
Provides 8590 N of pull force at 0.7 MPa for pressing heavy components, with a mechanical stop to fine-tune the exact bottoming position.
Long-Stroke Material Handling
Utilizes a 825-900 mm travel window to push heavy pallets or workpieces across extended conveyor sections on the factory floor.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX900-75 the Right Cylinder?
Select this 125 mm bore cylinder when an application demands high thrust combined with variable end-stops, avoiding the need to physically swap cylinders during product changeovers. If your process requires less force, stepping down to a 100 mm bore yields 5497 N of push force at 0.7 MPa, whereas a 160 mm bore provides 14074 N for heavier rigging. For applications needing true fail-safe load holding without continuous air pressure, consider the SAIL pneumatic lock or BSAI clamp-lock series instead of relying on the SAIJ adjuster.
When replacing an ISO 15552 cylinder, match the 125 mm bore, 900 mm stroke, 75 mm adjustment range, PT port thread, and the reduced SAIJ mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2). Because the 900 mm stroke is long, an external guide rail is strongly recommended to prevent excessive side-load stress on the 32 mm rod and M27x2 rod thread.
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 SAIJ125AX900-75 FAQ
At 0.7 MPa operating pressure, this 125 mm bore cylinder generates 8590 N of push force and 5734 N of pull force. It can reach a maximum push force of 11045 N at 1.0 MPa.
The rear adjuster acts as a mechanical stop that shortens the 900 mm nominal stroke by up to 75 mm, providing an 825-900 mm usable travel window. It sets the end position but does not lock or hold the load without live air pressure.
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Standard models usually ship in 3-4 days.
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