Airtac SAIJ125 Adjustable Cylinder SAIJ125AX80-50S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX80-50S 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 SAIJ125AX80-50S
The AirTAC SAIJ125X80-50-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It provides a robust 6136N push force at 0.5 MPa and uses a 32mm SUS420J2 stainless steel rod with an M27x2 thread. The built-in magnet enables position feedback via CMSE reed or DMSE solid-state sensors. With a nominal 80mm stroke and a 50mm adjustment range, you can dial the effective travel down to a 30-80mm window during commissioning without adding external stops.
This adjustable-stroke unit features a PT tapered port thread and variable air cushions at both ends to manage kinetic energy. It uses an extruded aluminum barrel with dual sensor grooves. The rear adjuster functions strictly as a travel stop to set end positions, not as a load-holding brake; for position retention without live air, consider an external pilot-operated check valve or related SAIL lock cylinders.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX80-50S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX80-50S |
|---|---|
| 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 SAIJ125AX80-50S
| 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 SAIJ125AX80-50S Is Used
Product Changeovers
Dial in the 30-80mm travel window during format size changes on a conveyor line without physically replacing the actuator.
Commissioning Calibration
Fine-tune the retract end-position during machine setup to absorb mechanical tolerances and achieve exact positioning.
Variable End Stops
Use the 50mm adjustment range to create a variable end-stop for testing different clamping depths on an assembly fixture.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX80-50S the Right Cylinder?
Choose this 125mm bore when a 100mm bore (3927N at 0.5 MPa) cannot supply enough thrust, but you want to avoid stepping up to a 160mm unit. The adjustable 30-80mm travel window is ideal for product changeovers on a packaging line, allowing you to fine-tune the retract end-position on the fly rather than swapping to a fixed-stroke SAI cylinder. Mounting options include the SAIJ-specific set: Basic, FA, LB, TC, FTC, TCM1, and TCM2.
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 SAIJ125AX80-50S FAQ
At 0.5 MPa operating pressure, this 125mm bore cylinder provides 6136N of push force and 5734N of pull force. At 0.7 MPa, the push force increases to 8590N.
The rear adjuster acts as a mechanical stop that lets you shorten the 80mm nominal stroke by up to 50mm, resulting in a usable 30-80mm travel window. It sets the end position but does not lock the load without live air pressure.
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