Airtac SAIJ125 Adjustable Cylinder SAIJ125X100-100S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X100-100S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 100mm 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
- Stroke100 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X100-100S
The AirTAC SAIJ125X100-100-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster. It features a 125mm bore and a 100mm nominal stroke, but the integrated stopper screw allows you to dial back the travel by up to 100mm. This creates a highly versatile 0-100mm usable stroke window, letting you set the exact retract end-position during commissioning without swapping hardware. With a robust 25mm carbon steel rod and M20x1.5 threading, it handles significant side loads while delivering 6136N of push force at 0.5 MPa.
This SAIJ variant includes a standard magnet for position sensing with AirTAC CMSE reed and DMSE electronic switches, fitting neatly into the dual-side sensor grooves of the extruded aluminum barrel. The rear adjuster acts purely as a mechanical stop to set the travel limit; it does not lock the load. For operations requiring true load-holding without live air pressure, you would need to step up to an SAIL pneumatic lock or BSAI clamp-lock cylinder.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X100-100S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X100-100S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 100 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 SAIJ125X100-100S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×100 | 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 SAIJ125X100-100S Is Used
Product Changeover Systems
Rapidly adapt end-stops for varying package sizes on a single conveyor line without disassembling the cylinder mount.
Press Stroke Tuning
Fine-tune the exact bottoming position of a pressing operation during commissioning to compensate for material thickness variations.
Adjustable Ejectors
Control the ejection distance of heavy parts from a mold, allowing operators to dial in the exact kick distance on the fly.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X100-100S the Right Cylinder?
Choose this 125mm bore when your application requires substantial thrust—specifically 6136N push and 5734N pull at 0.5 MPa. If your force requirements are lower, stepping down to an 80mm bore yields 2513N push, saving space and air consumption. The defining feature here is the 100mm adjustment range, providing unmatched flexibility for machines that process varying product sizes and need rapid changeovers. Instead of installing external stops or buying multiple fixed-stroke SAI cylinders, you simply turn the rear screw to shift the end-position anywhere within the 0 to 100mm window.
When replacing an ISO 15552 cylinder, match the 125mm bore, 100mm stroke, PT tapered port thread, and the -S magnet requirement. The compatible mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2. Because the adjustment range equals the full stroke length, you can effectively reduce the travel to near zero for setup or testing modes.
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 SAIJ125X100-100S FAQ
At a 0.5 MPa operating pressure, this 125mm bore cylinder generates 6136N of push force and 5734N of pull force. At the maximum 1.0 MPa pressure, it can deliver up to 1251 kgf.
The rear mechanical stopper allows you to shorten the 100mm nominal stroke by up to 100mm, creating a usable travel window of 0 to 100mm. This adjuster sets the end-position but does not lock the load without live air pressure.
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