Airtac SAIJ125 Adjustable Cylinder SAIJ125AX75-30
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX75-30 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 SAIJ125AX75-30
The AirTAC SAIJ125X75-30 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that creates a 45-75mm usable travel window. Delivering 6136N push force at 0.5MPa, it handles heavy positioning tasks. The extruded aluminum barrel includes sensor grooves on both sides for flexible switch placement.
This unit uses a SUS420J2 stainless steel rod (option A) for superior corrosion resistance and features PT tapered port threads. The rear stopper screw allows fine end-position tuning at commissioning without swapping the cylinder. The adjuster acts only as a travel stop and does not hold the load without live air pressure.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX75-30 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX75-30 |
|---|---|
| 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 SAIJ125AX75-30
| 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 SAIJ125AX75-30 Is Used
Variable End-Stop Setup
Dial in the exact 45-75mm travel distance during machine commissioning to accommodate different material thicknesses without external stops.
Product Size Changeover
Quickly adjust the retract end-position on packaging lines when switching between product sizes, minimizing downtime between production runs.
Heavy Positioning Tasks
Leverage the 6136N thrust capacity to move heavy fixtures into their final machined position while fine-tuning the landing point.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX75-30 the Right Cylinder?
Choose this 125mm bore when a 100mm bore (3927N push at 0.5MPa) lacks thrust but a 160mm bore is physically too large. The 30mm adjustment range is ideal for variable end-stops during product changeover, avoiding the need for fixed-stroke SAI cylinders. For load-holding without live air, use a SAIL or BSAI cylinder instead. ISO 15552 dimensions ensure mounting interchangeability using Basic, FA, LB, TC, FTC, TCM1, or TCM2 accessories.
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 SAIJ125AX75-30 FAQ
At 0.5MPa operating pressure, this 125mm bore cylinder provides 6136N of push force and 5734N of pull force. It can reach a maximum of 1251 kgf at 1.0MPa.
The rear adjuster screw acts as a mechanical stop, allowing you to shorten the 75mm nominal stroke by up to 30mm. This creates a usable travel window of 45-75mm for fine-tuning the end position.
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Standard models usually ship in 3-4 days.
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