Airtac SAIJ125 Adjustable Cylinder SAIJ125X90-50
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X90-50 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 90mm 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
- Stroke90 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X90-50
The AirTAC SAIJ125X90-50 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, delivering robust thrust of 6136N push and 5734N pull at 0.5 MPa. It features a carbon steel piston rod and PT tapered port threads. By turning the external rear stopper screw, you can shorten the effective travel from its nominal 90 mm down to a minimum of 40 mm, creating a highly adaptable 40-90 mm usable window.
This on-machine tuning allows precise end-position calibration during commissioning or product changeovers without swapping hardware. The extruded aluminum barrel includes sensor grooves on both sides, ready for CMSE reed or DMSE electronic switches if a magnet is specified later. It supports a reduced mounting subset of Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X90-50 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X90-50 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 90 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 SAIJ125X90-50
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×90 | 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 SAIJ125X90-50 Is Used
Variable End-Stop Fixtures
Dial in the exact clamping depth for varying material thicknesses using the 40-90 mm travel window without adding external mechanical stops.
Product Line Changeovers
Quickly reconfigure the rear stroke position on packaging or handling machinery during format changes to minimize production downtime.
Commissioning Calibration
Fine-tune the final retract position during machine setup to perfect timing and prevent mechanical crashes before locking down the sequence.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X90-50 the Right Cylinder?
Select this 125 mm bore when substantial force is required, stepping up from a 100 mm bore that provides 3927N push at 0.5 MPa. Choose the SAIJ adjustable format over a fixed SAI when your fixture needs variable end-stops for different product sizes. Because the 90 mm stroke is relatively short, side-loading is minimized, though the 32 mm rod and M27x2 thread provide excellent rigidity for heavy loads.
Remember that the rear screw acts purely as a travel stop and does not lock the load without live air pressure; for dead-air holding, use an external pilot-operated check valve or explore SAIL and BSAI variants. For an exact ISO 15552 replacement, match the 125 mm bore, 90 mm stroke, 50 mm adjustment, PT port, and your required mounting.
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 SAIJ125X90-50 FAQ
At 0.5 MPa operating pressure, this 125 mm bore cylinder provides 6136N of push force and 5734N of pull force. At 0.7 MPa, the push force increases to 8590N.
The rear adjuster screw allows you to trim the nominal 90 mm stroke back by up to 50 mm. This creates an adjustable travel window between 40 mm and 90 mm, enabling fine-tuning of the retract end position without replacing the cylinder.
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