Airtac SAIJ125 Adjustable Cylinder SAIJ125X450-10
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X450-10 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 450mm 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
- Stroke450 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X450-10
The AirTAC SAIJ125X450-10 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a nominal 450 mm travel that can be fine-tuned down by up to 10 mm, yielding a 440-450 mm usable window for precise end-position calibration at commissioning. Delivering 6136 N of push force at 0.5 MPa, it handles heavy-duty positioning tasks.
The extruded aluminum barrel integrates sensor grooves on both sides for straightforward switch mounting. This version uses a carbon steel piston rod with an M27x2 thread and a G1/2 PT tapered port. The rear adjuster acts purely as a mechanical stop to set the travel end and does not hold the load without live air pressure.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X450-10 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X450-10 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 450 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 SAIJ125X450-10
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×450 | 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 SAIJ125X450-10 Is Used
Heavy Press End-Tuning
Dial in the exact 440-450 mm end position during machine commissioning to prevent over-travel when pressing heavy components.
Product Changeover
Quickly shorten the retract stroke by up to 10 mm via the rear stopper when switching to a slightly shorter workpiece on the line.
Long-Stroke Positioning
Move large jigs using 6136 N of thrust at 0.5 MPa while relying on the integrated air cushions to decelerate the 450 mm travel.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X450-10 the Right Cylinder?
Choose this 125 mm bore cylinder when your application requires 6136 N of thrust at 0.5 MPa and on-the-fly end-stop tuning without adding external stoppers. If your force requirements are lower, stepping down to an 80 mm bore yields 2513 N, whereas stepping up to a 160 mm bore provides 10053 N. The adjustable rear screw is ideal for product changeovers where the exact end-of-stroke position varies slightly.
For a drop-in ISO 15552 replacement, match the 125 mm bore, 450 mm stroke, 10 mm adjustment range, G1/2 port, and carbon steel rod. Because the 450 mm stroke is relatively long, ensure you use an external guide to prevent side-load damage to the M27x2 rod. If you need true load holding without continuous air pressure, use an external rod lock or pilot-operated check valve, as the SAIJ adjuster is not a brake.
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 SAIJ125X450-10 FAQ
At an operating pressure of 0.5 MPa, this 125 mm bore cylinder generates 6136 N of push force and 5734 N of pull force. It can deliver up to 1251 kgf at the maximum 1.0 MPa pressure.
The rear adjuster screw acts as a mechanical stop that lets you trim the effective travel back by up to 10 mm from the nominal 450 mm stroke, providing a 440-450 mm usable window. It requires live air pressure to function and does not lock or hold the load pneumatically.
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