Airtac SAIJ125 Adjustable Cylinder SAIJ125X100-75
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X100-75 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 SAIJ125X100-75
The AirTAC SAIJ125X100-75 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a usable travel window of 25 to 100 mm, allowing you to dial back the nominal 100 mm stroke by up to 75 mm during commissioning. In the 125 mm bore class, it delivers 8590 N of pull force at 0.7 MPa, making it suitable for heavy-duty positioning.
This model features a robust 32 mm carbon steel rod and M27x2 rod threading. The extruded aluminum barrel includes sensor grooves on both sides for direct mounting of CMSE reed or DMSE electronic switches. The rear adjustment screw functions strictly as a travel stop for end-position tuning, not as a load-holding lock.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X100-75 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X100-75 |
|---|---|
| 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 SAIJ125X100-75
| 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 SAIJ125X100-75 Is Used
Variable End-Stop Tuning
Dial in precise end-positions from 25 to 100 mm during machine setup, accommodating different product widths without mechanical rebuilds.
Heavy-Duty Changeover
Leverage the 8590 N pull force at 0.7 MPa to push heavy pallets or fixtures, adjusting the stroke length rapidly for new production runs.
Press Fit Positioning
Use the fine rear stopper to set exact bottoming depths for pressing operations, ensuring consistent assembly tolerances.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X100-75 the Right Cylinder?
Choose this 125 mm bore when your application requires significantly more force than the 80 mm bore (which provides 2268 N pull at 0.5 MPa). The 75 mm adjustment range is ideal for machinery that frequently handles varying product sizes, allowing you to set a new end-stop without swapping the cylinder or adding external stops. For operations requiring the cylinder to hold a load without live air pressure, a standard SAIJ is insufficient; consider an AirTAC SAIL or BSAI series instead. This cylinder uses a PT tapered port thread and supports a mounting subset of Basic, FA, LB, TC, FTC, TCM1, and TCM2. Since the nominal stroke is 100 mm, an external guide is not strictly required for side-load management, but the 32 mm rod handles substantial side loads effectively.
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 SAIJ125X100-75 FAQ
At 0.7 MPa operating pressure, this 125 mm bore cylinder generates 8590 N of pull force and 11045 N of push force. It can safely operate up to a maximum pressure of 1.0 MPa.
The rear adjuster screw allows you to shorten the effective stroke by up to 75 mm from the 100 mm nominal travel. This creates a usable stroke window of 25 to 100 mm, enabling fine-tuning of the end position without replacing the cylinder.
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