Airtac SAIJ125 Adjustable Cylinder SAIJ125AX230-40
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX230-40 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 SAIJ125AX230-40
The AirTAC SAIJ125X230-40 is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers a robust 6136N push force at 0.5 MPa, making it suitable for heavy-duty positioning tasks. The integrated -40 adjustment code provides a usable travel window of 190 to 230 mm, allowing precise end-position tuning without swapping out the entire unit.
This model features a SUS420J2 stainless steel rod (material code A) for enhanced corrosion resistance and utilizes PT tapered port threads with a G1/2 connection. The extruded aluminum barrel includes sensor grooves on both sides. Note that the rear adjuster acts strictly as a travel stop for deceleration and positioning, not as a load-holding lock.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX230-40 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX230-40 |
|---|---|
| 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 SAIJ125AX230-40
| 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 SAIJ125AX230-40 Is Used
Product Changeovers
Dial in the 190-230 mm travel window during format size changes on packaging lines, using the rear screw to set new end positions rapidly without changing hardware.
Heavy Assembly Pressing
Leverage the 6136N push force at 0.5 MPa to seat heavy components, relying on the adjuster to fine-tune the pressing depth accurately.
Machine Commissioning
Trim the effective stroke by up to 40 mm during initial setup to perfect end-of-stroke timing and avoid mechanical interference.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX230-40 the Right Cylinder?
Select this 125 mm bore cylinder when an application requires substantial thrust—such as the 6136N push or 5734N pull at 0.5 MPa—combined with variable end-stop positioning. If a smaller footprint is acceptable, the 100 mm bore offers 3927N push force; conversely, stepping up to a 160 mm bore yields 10053N. The adjustable stroke is chosen over a fixed SAI model to simplify commissioning fine-tunes and product-size changeovers directly on the machine line.
Because the 230 mm stroke exceeds the 300 mm side-load threshold guideline, ensure adequate external guiding for long unsupported loads. For load-holding without live air pressure, this plain SAIJ is insufficient; instead, consider the SAIL pneumatic lock or BSAI clamp-lock series. Replacement requires matching the 125 mm bore, 230 mm stroke, PT port, and the reduced SAIJ mounting set (Basic, FA, LB, TC, FTC, TCM1, 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 SAIJ125AX230-40 FAQ
At 0.5 MPa operating pressure, this 125 mm bore cylinder provides a push force of 6136N and a pull force of 5734N. It can reach a maximum push force of 11045N at 0.9 MPa.
The rear adjuster acts as an external stopper that trims the effective travel. For the SAIJ125X230-40, you can shorten the 230 mm nominal stroke by up to 40 mm, creating a usable travel window of 190 to 230 mm. It functions as a stop, not a lock.
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