Airtac SAIJ125 Adjustable Cylinder SAIJ125AX750-30
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX750-30 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 750mm 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
- Stroke750 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX750-30
The AirTAC SAIJ125X750-30 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It delivers a robust 6136N of push force at 0.5 MPa and provides a usable travel window of 720-750mm, letting you dial back the nominal 750mm stroke by up to 30mm during commissioning.
This model uses a SUS420J2 stainless steel rod for superior corrosion resistance and features PT tapered port threads (G1/2). The extruded aluminum barrel includes sensor grooves on both sides for flexible mounting of CMSE or DMSE switches, while the variable air cushions at both ends absorb kinetic energy across its 30-500mm/s operating speed range.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX750-30 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX750-30 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 750 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 SAIJ125AX750-30
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×750 | 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 SAIJ125AX750-30 Is Used
Variable End-Stop Forming
Fine-tune the 720-750mm travel window on a press to accommodate material thickness variations without mechanical rebuilds.
Product Changeover Diverter
Adjust the rear stopper by up to 30mm to instantly reposition a diverter gate for different package lengths on a packaging line.
Long-Stroke Assembly Press
Leverage the 6136N push force and 750mm travel to drive long-stroke seating operations, tuning the final end position during machine setup.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX750-30 the Right Cylinder?
Choose this 125mm bore when you need higher thrust than an 80mm cylinder (which provides 2513N push at 0.5 MPa) but want to avoid the size and 15708N force of a 200mm bore. The 30mm rear adjuster is ideal for product changeovers, allowing you to fine-tune the end position without swapping the cylinder or adding external stops. Because the nominal 750mm stroke is long, always use an external guide to prevent side-loading damage to the rod and bearings.
This cylinder is dimensionally interchangeable per ISO 15552. To match this exact replacement, specify: 125mm bore, 750mm stroke, 30mm adjustment, PT G1/2 ports, Basic/LB/TC mounting (SAIJ omits FB/CA/CB/CR options), and no magnet. Note that the rear adjuster acts only as a travel stop and does not hold the load without live air; for fail-safe load holding, select an SAIL or BSAI 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 SAIJ125AX750-30 FAQ
The rear adjuster screw lets you shorten the effective travel by up to 30mm, creating a 720-750mm usable stroke window. This allows precise end-position tuning at commissioning without replacing the cylinder.
At 0.5 MPa operating pressure, the SAIJ125X750-30 provides 6136N of push force and 5734N of pull force. It can deliver up to 1251 kgf at its maximum 1.0 MPa pressure rating.
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