Airtac SAIJ125 Adjustable Cylinder SAIJ125X130-75
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X130-75 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 130mm 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
- Stroke130 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X130-75
The AirTAC SAIJ125X130-75 is a double-acting, single-rod ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a substantial 6136N push force at 0.5MPa (8590N at 0.7MPa), utilizing a 32mm carbon steel rod with an M27x2 thread. The integrated rear stopper screw allows you to fine-tune the effective travel window down from a 130mm nominal stroke to a minimum of 55mm, giving a 75mm adjustment range.
This wide variability makes it ideal for machine setups requiring rapid product-size changeovers without swapping hardware. The extruded aluminum barrel includes sensor grooves on both sides, and pneumatic cushioning at both ends manages deceleration. Remember that the rear adjuster acts only as a travel stop and does not hold the load without live air pressure; for true load-holding, consider the SAIL or BSAI series.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X130-75 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X130-75 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 130 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 SAIJ125X130-75
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×130 | 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 SAIJ125X130-75 Is Used
Variable End Stops
Dial in precise retract positions on the fly for machinery that processes varying part lengths, utilizing the full 55-130mm travel window.
Machine Changeover
Rapidly adapt automated lines for new product sizes by adjusting the rear stopper screw instead of physically swapping out cylinders.
Heavy Fixture Positioning
Leverage the 6136N push force at 0.5MPa to move heavy jigs and fixtures into exact final positions during commissioning.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X130-75 the Right Cylinder?
Choose this 125mm bore when an 80mm cylinder (2513N push at 0.5MPa) lacks the thrust for moving heavy fixtures, but a 160mm bore (10053N) would be physically oversized. The 75mm adjustment range is particularly useful for commissioning equipment that processes multiple product lengths, allowing you to dial in the exact end position rather than relying on fixed SAI cylinder strokes. When matching your ISO 15552 replacement, specify the 130mm stroke, 75mm adjuster, PT port threads, and the reduced SAIJ mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2).
Because the nominal stroke of 130mm is below the 300mm threshold, side-load stress on the M27x2 rod is minimal, though an external guide is still recommended for heavy lateral loads. Operating speed is 30-500mm/s. For position feedback, you can add a magnet (-S) to use CMSE reed or DMSE electronic sensors.
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 SAIJ125X130-75 FAQ
At a 0.5MPa operating pressure, this 125mm bore cylinder provides 6136N of push force and 5734N of pull force. If you increase the pressure to 0.7MPa, the push force rises to 8590N.
The rear adjuster screw acts as an external stopper that mechanically limits the piston's travel. For this SAIJ125X130-75 model, you can trim the 130mm nominal stroke back by up to 75mm, creating a usable travel window between 55mm and 130mm without changing the cylinder itself.
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