Airtac SAIJ125 Adjustable Cylinder SAIJ125X110-20S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X110-20S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 110mm 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
- Stroke110 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X110-20S
The AirTAC SAIJ125X110-20-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a substantial 6136N push force and 5734N pull force at 0.5 MPa, making it suited for heavy-duty positioning. By integrating an external stopper screw, this specific SKU allows you to trim the nominal 110mm travel back by up to 20mm, creating a precise 90-110mm usable window for final end-position tuning during commissioning.
Because this variant includes a magnet (-S), it directly supports AirTAC CMSE reed and DMSE solid-state sensors housed within the dual-side extruded aluminum barrel grooves. The carbon steel rod measures 32mm with an M27x2 thread, providing a robust interface for high-load linkages. Fluid supply connects via a PT tapered G1/2 port, and the unit relies on 40mm variable air cushions at both ends to decelerate the moving load.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X110-20S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X110-20S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 110 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 SAIJ125X110-20S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×110 | 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 SAIJ125X110-20S Is Used
Product Changeover Stops
Dial in the 90-110mm travel window during line format changes to accommodate varying package sizes without replacing the actuator.
Heavy Press Tuning
Fine-tune the exact end-of-stroke contact point for a 6136N pressing operation at machine commissioning without adding external mechanical stops.
Conveyor Diverter Setup
Adjust the retract position precisely during initial setup to align heavy diverter arms perfectly with downstream conveyor lanes.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X110-20S the Right Cylinder?
Choose this 125mm bore when an 80mm cylinder lacks thrust, as stepping down to an 80mm bore yields only 2513N push at 0.5 MPa. The adjustable 90-110mm travel window is selected over a fixed-stroke SAI cylinder when a machine requires variable end-stops to accommodate product-size changeovers without physically swapping the actuator. Remember that the rear adjuster acts only as a travel stop and does not hold the load without live air; for true fail-safe load holding, select a SAIL or BSAI cylinder instead. As a true ISO 15552 profile cylinder, it is dimensionally interchangeable with standard ISO 15552 mounting interfaces. Replacement specifications are 125mm bore, 110mm stroke, 20mm adjustment, PT G1/2 port, carbon steel rod, and -S magnet.
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 SAIJ125X110-20S FAQ
At an operating pressure of 0.5 MPa, this 125mm bore cylinder generates a push force of 6136N and a pull force of 5734N. At a maximum pressure of 1.0 MPa, it can deliver up to 1251 kgf.
The rear adjuster screw allows you to shorten the nominal 110mm stroke by up to 20mm, providing a usable travel window of 90 to 110mm. This stopper only sets the end position and decelerates the load; it does not lock or hold the load without continuous air pressure.
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