Airtac SAIJ125 Adjustable Cylinder SAIJ125AX900-30S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX900-30S 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 SAIJ125AX900-30S
The AirTAC SAIJ125X900-30-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster. It delivers 6136N of push force at 0.5 MPa and incorporates a SUS420J2 stainless steel rod for enhanced durability against lateral stress. The built-in magnet enables precise position detection using CMSE reed or DMSE solid-state sensors.
This specific SKU provides a 900mm nominal stroke that can be dialed back by up to 30mm, creating an 870-900mm usable travel window. This built-in adjustability allows you to fine-tune end positions during commissioning without adding external stops. The extruded aluminum barrel includes sensor grooves on both sides, and the G1/2 PT tapered port ensures a robust pneumatic connection.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX900-30S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX900-30S |
|---|---|
| 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 SAIJ125AX900-30S
| 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 SAIJ125AX900-30S Is Used
Variable End-Stop Positioning
Dial in the exact 870-900mm retraction point during machine setup to accommodate varying product lengths without replacing the cylinder.
Automated Pressing
Leverage the 6136N thrust for heavy-duty pressing operations, using the rear stop to fine-tune the final pressing depth safely.
Long-Stroke Diverting
Manage long-travel routing or diverting tasks on a conveyor line, utilizing the 30-500mm/s speed range and built-in magnet for tracking.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX900-30S the Right Cylinder?
Selecting this 125mm bore makes sense when your application requires substantial thrust, offering 6136N push and 5734N pull at 0.5 MPa. If your force requirements are lower, stepping down to a 100mm bore yields 3927N push force, while upgrading to a 160mm bore provides 10053N for heavier loads. The adjustable stroke is highly beneficial for product changeovers, allowing you to shift the end-stop dynamically rather than physically swapping a fixed-stroke SAI cylinder.
Because the stroke is 900mm, an external guide is strongly recommended to prevent excessive side-load wear on the rod and seals. Remember that the rear adjuster functions strictly as a travel stop and does not hold the load without live air pressure; for true load-holding, consider an external rod lock or the AirTAC SAIL or BSAI series. This model is dimensionally interchangeable per ISO 15552 and supports Basic, FA, LB, TC, FTC, TCM1, and TCM2 mounts.
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 SAIJ125AX900-30S FAQ
At an operating pressure of 0.5 MPa, this 125mm bore cylinder provides 6136N of push force and 5734N of pull force. At the maximum pressure of 1.0 MPa, it delivers up to 1251 kgf.
The rear adjuster acts as a mechanical stop that shortens the 900mm nominal stroke by up to 30mm, giving you an 870-900mm usable travel window. It only sets the end position and does not lock or hold the load without continuous air pressure.
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