Airtac SAIJ100 Adjustable Cylinder SAIJ100AX125-20S
The AirTAC Airtac SAIJ100 Adjustable Cylinder SAIJ100AX125-20S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø100mm bore and 125mm 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.
- BoreØ100 mm
- Stroke125 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ100 Adjustable Cylinder SAIJ100AX125-20S
The AirTAC SAIJ100X125-20-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, providing a usable travel window of 105 to 125 mm. Delivering a push force of 3927 N at 0.5 MPa (up to 7068 N at 0.9 MPa), it handles heavy loads with precision. This variant features a SUS420J2 stainless steel rod (code A) and includes a magnet for position sensing.
The integrated rear stopper allows you to fine-tune the retract end position during commissioning without swapping the cylinder or adding external stops. It shares the standard extruded aluminum barrel with dual sensor grooves, operating at 30-800 mm/s with a G1/2 port. Mounting options include Basic, FA, LB, TC, FTC, TCM1, and TCM2.
Airtac SAIJ100 Adjustable Cylinder SAIJ100AX125-20S Technical Specifications
| Model | Airtac SAIJ100 Adjustable Cylinder SAIJ100AX125-20S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø100 mm |
| Stroke | 125 mm |
| Acting type | Double acting |
| Port size | G1/2 |
| Rod thread | M20×1.5 |
| 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 – 800 mm/s |
| Cushion | Adjustable, 36 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 (Ø100mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 3927 N | 3682 N |
| 0.7 MPa | 5498 N | — |
| Max (@1.0 MPa) | 801 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ100 Adjustable Cylinder SAIJ100AX125-20S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 100 | Bore size in mm. |
| ×125 | 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 SAIJ100 Adjustable Cylinder SAIJ100AX125-20S Is Used
Machine Setup Changeover
Dial in the exact retract distance from 105 to 125 mm during machine changeovers to accommodate new product sizes without physically replacing the cylinder.
Variable End-Stop Positioning
Provide a fine-tuned mechanical stop on a conveyor diverter where the exact resting position of the actuator needs slight trimming during initial commissioning.
Heavy-Duty Assembly Press
Leverage the 3927 N push force at 0.5 MPa for pressing operations while adjusting the stroke window to set precise material contact depths.
Is the Airtac SAIJ100 Adjustable Cylinder SAIJ100AX125-20S the Right Cylinder?
Choose this 100 mm bore when 80 mm (2513 N push at 0.5 MPa) is insufficient for your load, or step down if 50 mm (982 N) is enough. An adjustable stroke is ideal for product changeovers requiring variable end-stops, unlike a fixed-stroke SAI cylinder. The rear adjuster acts purely as a travel stop and does not hold the load without live air; for true load-holding, use a SAIL or BSAI cylinder. To match this ISO 15552 replacement, verify the 125 mm stroke, 20 mm adjustment, G1/2 PT port, and the -S magnet requirement.
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 SAIJ100 Adjustable Cylinder SAIJ100AX125-20S FAQ
At a 0.5 MPa operating pressure, this 100 mm bore cylinder generates a push force of 3927 N and a pull force of 3681 N. At 0.9 MPa, the push force increases to 7068 N.
The rear adjuster screw allows you to shorten the nominal 125 mm stroke by up to 20 mm, creating a usable travel window of 105 to 125 mm. This stopper only sets the end position and does not lock the load without continuous air pressure.
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