Airtac SAIJ125 Adjustable Cylinder SAIJ125X325-10
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X325-10 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 325mm 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
- Stroke325 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X325-10
The AirTAC SAIJ125X325-10 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a 315-325 mm usable travel window by allowing up to 10 mm of retraction end fine-tuning. Delivering 8590 N of thrust at 0.7 MPa, it handles heavy loads while maintaining standard ISO 15552 mounting dimensions.
This model uses a carbon steel piston rod with an M27x2 thread and a PT tapered port. The extruded aluminum barrel includes sensor grooves on both sides for flexible switch placement. It supports speeds of 30-500 mm/s and features variable air cushions at both ends to manage impact energy.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X325-10 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X325-10 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 325 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 SAIJ125X325-10
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×325 | 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 SAIJ125X325-10 Is Used
Machine Changeover
Dial in the 315-325 mm end position precisely when switching product sizes on a line, avoiding external stop hardware.
Heavy Assembly Press
Utilize the 8590 N thrust at 0.7 MPa for pressing components, using the rear screw to fine-tune the bottoming depth.
Long-Stroke Positioning
Move heavy jigs over a 325 mm stroke while relying on the 32 mm carbon steel rod to manage structural loads.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X325-10 the Right Cylinder?
Choose this 125 mm bore when an application requires high force (8590 N at 0.7 MPa) that exceeds the 5497 N push force of a 100 mm bore SAIJ. The 10 mm rear adjuster is ideal for dialing in exact end positions during machine commissioning or product changeover without swapping the cylinder. For strokes of 325 mm or more, an external guide rail is recommended to prevent excessive rod side-loading.
This cylinder is dimensionally interchangeable per ISO 15552. Configuration: 125 mm bore, 325 mm stroke, 10 mm adjustment, PT port, carbon steel rod, no magnet. It uses the reduced SAIJ mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2). Note that the rear adjuster acts only as a travel stop and does not hold the load without live air; for true load-holding, consider SAIL or BSAI models.
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 SAIJ125X325-10 FAQ
At 0.7 MPa operating pressure, this 125 mm bore cylinder generates 8590 N of push force and 5734 N of pull force. At 0.5 MPa, it provides 6136 N push and 5734 N pull.
The rear adjuster screw acts as a mechanical stop, allowing you to shorten the effective stroke from 325 mm down to 315 mm. This enables precise end-position tuning at commissioning without adding external stops.
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