Airtac SAIJ125 Adjustable Cylinder SAIJ125X225-100S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X225-100S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 225mm 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
- Stroke225 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X225-100S
The AirTAC SAIJ125X225-100-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that permits a usable travel window of 125 to 225 mm. By dialing back the nominal stroke by up to 100 mm, you gain immense flexibility during product changeovers without physically swapping the actuator. Operating at 0.5 MPa, it delivers 6136 N of push force and 5734 N of pull force, making it suitable for heavy moving loads.
This unit includes a -S magnet for position sensing with AirTAC CMSE reed and DMSE electronic switches, which seat neatly into the sensor grooves on both sides of the extruded aluminum barrel. The 125 mm bore utilizes a PT tapered G1/2 port and a robust 32 mm carbon steel rod with an M27x2 thread. The rear adjuster acts purely as a mechanical stop to set the retract end position and does not hold the load without live air pressure.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X225-100S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X225-100S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 225 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 SAIJ125X225-100S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×225 | 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 SAIJ125X225-100S Is Used
Heavy Assembly Presses
Dial in the exact 125 to 225 mm end-stop during initial commissioning to accommodate varying product heights without installing external physical stops.
Pallet Diverters
Adjust the retract distance on the fly to handle different pallet widths moving down a packaging line, ensuring precise positioning every time.
Machine Format Changeover
Rapidly reconfigure the stroke window up to 100 mm when switching production runs, saving the downtime of physically unbolting and replacing cylinders.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X225-100S the Right Cylinder?
Select this 125 mm bore actuator when your application requires high thrust between the 80 mm bore (2513 N push at 0.5 MPa) and the 160 mm bore (10053 N push at 0.5 MPa) classes. The 100 mm adjustment range is ideal for machinery requiring significant stroke variability during commissioning or format changes, serving as a highly flexible alternative to fixed-stroke SAI models. To match an ISO 15552 replacement exactly, verify the 225 mm stroke, 100 mm adjuster, PT G1/2 port, basic mounting hardware, and the -S magnet requirement.
Because the 225 mm stroke is substantial, the 32 mm rod provides excellent rigidity, yet an external guide should still be employed to prevent side-loading damage over long unsupported travels. Remember that the rear stopper and air cushions only decelerate the load; for true load-holding without live air, an external rod lock or a SAIL/BSAI series cylinder is required.
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 SAIJ125X225-100S FAQ
At 0.5 MPa operating pressure, this 125 mm bore cylinder provides 6136 N of push force and 5734 N of pull force. At its maximum 1.0 MPa pressure rating, it can generate up to 1251 kgf of thrust.
The rear mechanical stopper allows you to trim the effective travel back from the 225 mm nominal stroke by up to 100 mm, creating a 125 to 225 mm usable window. The adjuster sets the end position but does not lock the load without continuous air pressure.
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