Airtac SAIJ125 Adjustable Cylinder SAIJ125X135-100S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X135-100S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 135mm 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
- Stroke135 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X135-100S
The AirTAC SAIJ125X135-100-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, providing a highly flexible usable travel window of 35 to 135 mm. Featuring a 125 mm bore, it delivers 6136 N of push force at 0.5 MPa, making it suitable for heavy-duty positioning tasks. The integrated magnet supports position sensing via CMSE reed or DMSE electronic switches.
This model utilizes a carbon steel piston rod with an M27x2 thread and a PT tapered port. The rear adjuster functions strictly as a mechanical stop to fine-tune the end position during commissioning; it does not lock or hold the load without continuous air pressure. For load-holding requirements, exploring SAIL or BSAI variants is recommended.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X135-100S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X135-100S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 135 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 SAIJ125X135-100S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×135 | 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 SAIJ125X135-100S Is Used
Variable End-Stop Tuning
Dial in the exact retract distance for multi-format packaging lines, utilizing the 35-135 mm window to switch between container sizes rapidly without mechanical rebuilds.
Machine Setup Changeover
Leverage the 100 mm adjustment screw during product family transitions to reposition heavy actuators quickly, saving hours of manual recalibration on the factory floor.
Heavy-Duty Positioning
Apply the 6136 N push force to move substantial jigs or fixtures into place, relying on the fine-tuned rear stop to guarantee precise spatial placement.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X135-100S the Right Cylinder?
Choose this 125 mm bore cylinder when an application demands high thrust combined with extreme variability in the retract end-stop, as the 100 mm adjustment range allows for significant product-size changeovers without swapping hardware. If the 6136 N push force at 0.5 MPa exceeds requirements, stepping down to an 80 mm bore yields 2513 N, whereas moving up to a 160 mm bore provides 10053 N.
To achieve a true ISO 15552 replacement match, confirm the 135 mm stroke, 100 mm adjustment range, PT port thread, and the -S magnet option. Mounting choices are limited to the SAIJ subset: Basic, FA, LB, TC, FTC, TCM1, and TCM2. Because the stroke exceeds 300 mm on larger variants, always ensure external guidance to prevent rod side-loading, though this shorter 135 mm stroke inherently minimizes such bending risks.
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 SAIJ125X135-100S FAQ
At a standard 0.5 MPa operating pressure, this 125 mm bore cylinder generates a push force of 6136 N and a pull force of 5734 N. At 0.7 MPa, the push force increases to 8590 N.
The rear adjuster acts as a mechanical stop that allows you to shorten the effective stroke from its 135 mm nominal length down to 35 mm. It only sets the travel end-point and does not hold the load without live air pressure.
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