Airtac SAIJ125 Adjustable Cylinder SAIJ125AX600-20S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX600-20S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 600mm 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
- Stroke600 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX600-20S
The AirTAC SAIJ125X600-20-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a 600 mm nominal stroke that can be dialed back by up to 20 mm, yielding a 580-600 mm usable travel window for precise end-position tuning at commissioning. In the push direction at 0.5 MPa, it delivers 6136 N of thrust.
This unit includes a SUS420J2 stainless steel rod (material code A) for improved corrosion resistance and carries an internal magnet for CMSE reed and DMSE electronic sensors. The extruded aluminum barrel design integrates sensor grooves on both sides, and the rear adjuster acts purely as a travel stop—it does not lock or hold the load without continuous live air pressure.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX600-20S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX600-20S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 600 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 SAIJ125AX600-20S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×600 | 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 SAIJ125AX600-20S Is Used
Product Changeover
Dial in the 580-600 mm travel window during format size changes on a packaging line without replacing the cylinder.
End-Position Tuning
Fine-tune the retract end-stop at commissioning to perfect the seating of heavy components, avoiding external shims.
Variable End Stops
Adjust the stroke limit on the fly for automated assembly equipment processing parts of slightly varying dimensions.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX600-20S the Right Cylinder?
Choose this 125 mm bore when a 100 mm bore (providing 3927 N push force at 0.5 MPa) is insufficient for your load, but a 160 mm bore (10053 N) would be excessive overkill. The adjustable stroke is ideal for machine setups requiring variable end stops or product-size changeovers without physically swapping cylinders or adding external stops. Because the 600 mm stroke is substantial, an external guide is recommended to prevent excessive side-loading on the rod. For load-holding without live air, select a SAIL or BSAI cylinder instead, as the SAIJ adjuster is only a stop. To match this ISO 15552 cylinder exactly, verify the 125 mm bore, 600 mm stroke, 20 mm adjustment, PT G1/2 port, and the -S magnet option.
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 SAIJ125AX600-20S FAQ
At 0.5 MPa, this 125 mm bore cylinder provides 6136 N of push force and 5734 N of pull force. If operating at 0.7 MPa, the push force increases to 8590 N.
The rear adjusting screw acts as a mechanical stopper that can trim the 600 mm nominal stroke back by up to 20 mm, creating a 580-600 mm usable travel window. It sets the end position but does not lock the load without live air pressure.
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