Airtac SAIJ125 Adjustable Cylinder SAIJ125AX80-75S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX80-75S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 80mm 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
- Stroke80 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX80-75S
The AirTAC SAIJ125X80-75-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that permits a usable travel window of 5 to 80 mm. Delivering 6136 N of push force at 0.5 MPa, it integrates a SUS420J2 stainless steel rod for enhanced corrosion resistance and a built-in magnet compatible with AirTAC CMSE reed and DMSE electronic sensors. The PT tapered port threads ensure a robust, vibration-resistant pneumatic connection.
This adjustable-stroke design allows operators to fine-tune end positions during commissioning or product changeovers without swapping the cylinder or adding external stops. The rear adjuster acts purely as a mechanical travel stop and does not hold the load without live air pressure; for true load-holding, consider the SAIL or BSAI series. It supports a reduced mounting set of Basic, FA, LB, TC, FTC, TCM1, and TCM2.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX80-75S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX80-75S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 80 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 SAIJ125AX80-75S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×80 | 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 SAIJ125AX80-75S Is Used
Machine Changeover
Dial in the 5 to 80 mm travel window instantly when switching production lines to different product sizes without changing hardware.
Variable End Stops
Set precise retract positions for multi-stage tooling operations where the exact end-of-stroke point must be tuned on the fly.
Assembly Calibration
Fine-tune the 6136 N clamping travel during initial equipment commissioning to accommodate mechanical tolerances and sensor placement.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX80-75S the Right Cylinder?
Selecting this 125 mm bore model provides 6136 N push and 5734 N pull force at 0.5 MPa, making it a significant step up from the 80 mm bore which yields 2513 N. The 75 mm adjustment range on an 80 mm nominal stroke is ideal for machines requiring highly variable end-stops, replacing the need for fixed-stroke SAI cylinders when exact positioning is unknown. For load-holding without live pressure, use an external rod lock or pilot-operated check valve. The interchangeable ISO 15552 footprint matches bore, stroke, PT port, and mounting dimensions, and the -S magnet enables precise DMSE electronic sensing.
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 SAIJ125AX80-75S FAQ
At 0.5 MPa operating pressure, this 125 mm bore cylinder provides 6136 N of push force and 5734 N of pull force. At the maximum 1.0 MPa pressure, it delivers up to 1251 kgf.
The rear adjuster screw lets you trim the 80 mm nominal stroke back by up to 75 mm, creating a usable travel window of 5 to 80 mm. This mechanical stop only sets the end position and does not lock the load without continuous air pressure.
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