Airtac SAIJ125 Adjustable Cylinder SAIJ125X230-40
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X230-40 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 230mm 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
- Stroke230 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X230-40
The AirTAC SAIJ125X230-40 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It delivers a robust 6136N push force at 0.5 MPa and provides a usable travel window of 190 to 230mm, letting you trim the effective stroke by up to 40mm during commissioning. The extruded aluminum barrel includes sensor grooves on both sides for flexible switch placement.
Equipped with a 32mm carbon steel piston rod and an M27x2 rod thread, this unit handles substantial loads with a 30 to 500mm/s speed range. The rear stopper screw sets the retract end position without requiring external stops, while the PT tapered port ensures a tight pneumatic seal. It is a standard profile cylinder, dimensionally interchangeable per ISO 15552.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X230-40 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X230-40 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 230 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 SAIJ125X230-40
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×230 | 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 SAIJ125X230-40 Is Used
Product Changeover
Dial in the 190-230mm travel window to accommodate different part lengths on an assembly line without changing out the entire actuator.
Machine Setup
Fine-tune the exact end-of-stroke position during initial commissioning to prevent over-travel and crush damage on heavy workpieces.
Variable End Stops
Use the 40mm rear adjustment screw to alter the retract distance dynamically for flexible manufacturing processes.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X230-40 the Right Cylinder?
Choose this 125mm bore when an 80mm cylinder (delivering 2513N push at 0.5MPa) lacks the necessary thrust, but a 160mm bore would be excessive. The adjustable 40mm window is ideal for product changeovers, allowing you to shift the end-stop on the fly rather than physically swapping a fixed-stroke SAI cylinder. Because the stroke is 230mm, ensure adequate external guiding to prevent excessive side-loading on the M27x2 rod thread.
For setup, match the exact bore, the 230mm nominal stroke, the 40mm adjustment code, PT port thread, and your required mounting style. The SAIJ series supports Basic, FA, LB, TC, FTC, TCM1, and TCM2 mounts. Remember that the rear adjuster acts only as a travel stop, not a load lock; if you need to hold a load without live air pressure, use an external rod lock or a SAIL pneumatic lock cylinder.
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 SAIJ125X230-40 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 screw allows you to shorten the nominal 230mm stroke by up to 40mm, creating a usable travel window of 190 to 230mm. It acts as a physical stop and does not lock the load without live air.
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