Airtac SAIJ125 Adjustable Cylinder SAIJ125X75-30S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X75-30S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 75mm 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
- Stroke75 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X75-30S
The AirTAC SAIJ125X75-30-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers a robust 6136N pull force at 0.5 MPa, featuring a built-in magnet for position sensing. The external rear stopper allows you to trim the nominal 75mm stroke back by up to 30mm, creating a precise 45-75mm usable travel window for exact end-position tuning.
This adjustable design eliminates the need to swap cylinders or bolt on external stops during product changeover. It includes a 32mm carbon steel rod with an M27x2 thread, providing high rigidity against side loads. The extruded aluminum barrel features sensor grooves on both sides, and the -S magnet works seamlessly with AirTAC CMSE reed and DMSE electronic sensors.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X75-30S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X75-30S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 75 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 SAIJ125X75-30S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×75 | 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 SAIJ125X75-30S Is Used
Machine Changeover
Dial in the 45-75mm stroke window during product size changes without swapping the actuator or adding external stopper blocks.
End-Position Tuning
Fine-tune the exact retract position at commissioning to perfect seating or clamping alignment on the assembly line.
Variable Clamping Force
Leverage the 6136N pull force to securely clamp heavy workpieces while adjusting the travel to accommodate different part heights.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X75-30S the Right Cylinder?
Choose this 125mm bore actuator when your application requires substantial force, such as 6136N pull or 8590N push at 0.7 MPa, combined with variable end-stop positioning. If you need less force, stepping down to a 100mm bore yields 3681N pull at 0.5 MPa. The SAIJ125X75-30-S is selected over a fixed-stroke SAI when commissioning requires fine-tuning the retract distance without mechanical modifications. It uses a PT tapered port and supports Basic, FA, LB, TC, FTC, TCM1, and TCM2 mounts. Note that the rear adjuster is a travel stop, not a lock; this cylinder will not hold a load without live air pressure. For secure load holding, consider the SAIL or BSAI series.
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 SAIJ125X75-30S FAQ
The rear adjusting screw acts as a mechanical stopper that lets you shorten the effective stroke by up to 30mm. This gives the 75mm nominal stroke a usable travel window of 45-75mm, allowing precise end-position tuning at commissioning.
At 0.5 MPa, it provides 6136N of push force and 5734N of pull force. At 0.7 MPa, the push force increases to 8590N.
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Standard models usually ship in 3-4 days.
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