Airtac SAIJ40 Adjustable Cylinder SAIJ40AX90-50S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40AX90-50S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 90mm stroke, G1/4 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ40 mm
- Stroke90 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40AX90-50S
The AirTAC SAIJ40X90-50-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to dial back the 90 mm nominal travel by up to 50 mm. This creates a highly flexible 40-90 mm usable stroke window, letting you set exact end positions at commissioning without adding external physical stops. It delivers 628 N of push force at 0.5 MPa and 879 N at 0.7 MPa.
This unit is built with a SUS420J2 stainless steel piston rod (option A) for improved corrosion resistance and includes a position magnet for electronic DMSE or reed CMSE sensors. The extruded aluminum barrel integrates sensor grooves on both sides, and the rear adjuster functions purely as a travel stop to decelerate the load rather than a lock for holding it in place without live air pressure.
Airtac SAIJ40 Adjustable Cylinder SAIJ40AX90-50S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40AX90-50S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 90 mm |
| Acting type | Double acting |
| Port size | G1/4 |
| Rod thread | M12×1.25 |
| 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 – 800 mm/s |
| Cushion | Adjustable, 30 mm |
| Max stroke | Up to 1200 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 (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (@1.0 MPa) | 128 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ40 Adjustable Cylinder SAIJ40AX90-50S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | 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 SAIJ40 Adjustable Cylinder SAIJ40AX90-50S Is Used
Machine Changeovers
Rapidly reconfigure the 40-90 mm stroke window during product size transitions on a packaging line without disassembling the cylinder assembly.
End-Position Tuning
Fine-tune the exact retract distance during machine commissioning to synchronize multiple actuators and avoid mechanical interference.
Sensor-Ready Automation
Leverage the integrated magnet and dual-side sensor grooves to trigger DMSE solid-state switches at custom-defined adjustable endpoints.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40AX90-50S the Right Cylinder?
Choose this 40 mm bore if your application requires around 628 N of push force at 0.5 MPa; stepping down to a 32 mm bore drops the output to 402 N, while moving up to a 50 mm bore increases it to 982 N. The 50 mm adjustment range is ideal for machines handling frequent product-size changeovers, allowing operators to reposition the end-stop rapidly instead of physically swapping out the entire cylinder.
When replacing an ISO 15552 cylinder, match the 90 mm stroke, 50 mm adjustment range, PT G1/4 port thread, and the -S magnet requirement. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2 options, omitting FB, CA, CB, and CR. Because the rear adjuster only sets the travel end, any need to hold a load securely without continuous air pressure requires a separate SAIL pneumatic lock or an external rod lock.
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 SAIJ40 Adjustable Cylinder SAIJ40AX90-50S FAQ
At a 0.5 MPa operating pressure, this 40 mm bore cylinder provides 628 N of push force and 528 N of pull force. At 0.7 MPa, the push force increases to 879 N.
The rear adjuster screw allows you to shorten the 90 mm nominal stroke by up to 50 mm, creating a usable travel window between 40 and 90 mm. The adjuster acts as a mechanical stop to set the end position and does not lock the load without live air pressure.
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