Airtac SAIJ125 Adjustable Cylinder SAIJ125X115-100
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X115-100 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 115mm 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
- Stroke115 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X115-100
The AirTAC SAIJ125X115-100 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that trims the effective travel by up to 100 mm. This creates a highly flexible 15 to 115 mm usable window, allowing you to dial in the exact retract end-position during commissioning without swapping hardware. Built with an extruded aluminum barrel and a robust 32 mm carbon steel rod, it delivers 6136 N of push force at 0.5 MPa.
Equipped with PT tapered G1/2 ports and variable air cushions at both ends, this 125 mm bore actuator handles dynamic loads at speeds of 30-500 mm/s. The rear adjustment screw functions strictly as a travel stop for fine-tuning product changeovers, not as a locking mechanism. For position holding without live air pressure, an external rod lock or related SAIL pneumatic lock cylinder is required.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X115-100 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X115-100 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 115 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 SAIJ125X115-100
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×115 | 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 SAIJ125X115-100 Is Used
Variable End-Stop Positioning
Ideal for assembly lines requiring frequent size changeovers, allowing operators to trim the retract stroke anywhere from 15 to 115 mm directly at the rear adjuster.
Heavy-Duty Forming
Delivers 6136 N of push force at 0.5 MPa for pressing and clamping operations, with variable air cushions absorbing the kinetic energy of the large 125 mm bore piston.
Machine Commissioning
Enables fine-tuning of the end position during machine setup without fabricating external mechanical stops, ensuring precise alignment of heavy tooling.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X115-100 the Right Cylinder?
Choose this 125 mm bore when an application requires substantial thrust—such as 6136 N push at 0.5 MPa—combined with variable end-stop positioning. If your setup needs less force, stepping down to a 100 mm bore yields 3927 N push force, whereas moving up to a 160 mm bore provides 10053 N. The adjustable-stroke design is ideal for machines processing varying product sizes, replacing fixed-stroke SAI cylinders when frequent mechanical end-position adjustments are necessary.
Because the 115 mm nominal stroke falls under the 300 mm threshold, severe rod sag is minimal, but the 32 mm rod thread still requires external guiding for heavy off-center loads. This SAIJ configuration uses PT port threads, includes a standard carbon steel rod, and has no magnet (-S omitted). It supports the reduced SAIJ mounting set of Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR options.
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 SAIJ125X115-100 FAQ
The rear adjuster acts as an external stopper, allowing you to shorten the nominal 115 mm stroke by up to 100 mm. This provides a usable travel window of 15 to 115 mm, which can be fine-tuned during commissioning without changing the cylinder.
At 0.5 MPa operating pressure, it provides 6136 N of push force and 5734 N of pull force. At 0.7 MPa, the push force increases to 8590 N.
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