Airtac SAIJ125 Adjustable Cylinder SAIJ125AX220-75
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX220-75 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 220mm 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
- Stroke220 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX220-75
The AirTAC SAIJ125X220-75 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, allowing you to dial back the 220 mm nominal stroke by up to 75 mm. This yields a highly flexible usable travel window of 145 to 220 mm, perfect for accommodating product size changes on a line without physically swapping the actuator. The extruded aluminum barrel features sensor grooves on both sides, and because this configuration omits the -S magnet option, position sensing would require a separate external solution rather than the standard CMSE or DMSE electronic switches.
Driving this 125 mm bore at 0.5 MPa generates 6136 N of push force and 5734 N of pull force, scaling up to 11045 N at 0.9 MPa. The piston rod is constructed from SUS420J2 stainless steel (material code A) for enhanced corrosion resistance compared to standard carbon steel. As a true profile cylinder, it is dimensionally interchangeable per ISO 15552 and utilizes a reduced mounting subset of Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting the FB, CA, CB, and CR variants entirely.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX220-75 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX220-75 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 220 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 SAIJ125AX220-75
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×220 | 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 SAIJ125AX220-75 Is Used
Product Changeover
Dial the stroke back from 220 mm to 145 mm instantly on the production line when switching to a smaller product format, avoiding cylinder replacement downtime.
Press Fitment Tuning
Fine-tune the exact end-of-stroke position during machine commissioning to achieve perfect pressing force without machining custom external stopper blocks.
Heavy Payload Handling
Leverage the 6136 N of thrust at 0.5 MPa to move heavy assemblies, relying on the 32 mm rod and external guides to manage side loads during transit.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX220-75 the Right Cylinder?
Select this 125 mm bore actuator when your application requires substantial thrust—such as 6136 N at 0.5 MPa—combined with a wide 145-220 mm adjustable end-position window. If your force requirements are lower, stepping down to the 100 mm bore saves space and lowers air consumption while still providing 3927 N of push force at 0.5 MPa. Conversely, heavier loads may necessitate the 160 mm bore, which outputs 10053 N at the same pressure. The integrated rear screw stopper allows for precise fine-tuning during commissioning or product changeover, completely removing the need to bolt on external stops or replace a fixed-stroke SAI cylinder.
Because the 220 mm stroke exceeds the 300 mm side-load threshold, ensure you use an external guide to support any heavy or off-center loads. Furthermore, remember that the rear adjuster acts purely as a travel stop and the variable air cushions handle deceleration; neither component will hold a load without live air pressure. For secure load-holding in the event of air loss, consider an AirTAC SAIL pneumatic lock or BSAI clamp-lock cylinder instead. To match this ISO 15552 interchangeable profile cylinder, confirm your bore, 220 mm stroke, 75 mm adjustment range, PT tapered port thread, mounting style, and the absence of a 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 SAIJ125AX220-75 FAQ
The rear adjuster screw acts as an external stopper that shortens the effective travel. For this model, you can trim the 220 mm nominal stroke by up to 75 mm, giving a usable travel window of 145 to 220 mm. Note that this stopper only sets the end position; it does not lock or hold the load without continuous air pressure.
At a standard operating pressure of 0.5 MPa, the SAIJ125X220-75 provides 6136 N of push force and 5734 N of pull force. If you increase the pressure to 0.9 MPa, the push force scales up to 11045 N.
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