Airtac SAIJ40 Adjustable Cylinder SAIJ40AX90-75
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40AX90-75 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 SAIJ40AX90-75
The AirTAC SAIJ40X90-75 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a nominal 90 mm stroke that can be dialed back by up to 75 mm, yielding a highly flexible 15 to 90 mm usable travel window for precise end-position tuning during commissioning. It delivers 628 N of push force and 528 N of pull force at 0.5 MPa, utilizing a PT tapered port thread and a SUS420J2 stainless steel piston rod (material code A) for improved corrosion resistance.
This adjustable-stroke design allows you to set variable end stops on the fly without swapping out the entire cylinder or bolting on external stops. The rear adjuster functions purely as a travel stop to set the retract position, meaning it will not hold a load dynamically without live air pressure. For applications requiring true load-holding without continuous air, consider the SAIL or BSAI series instead.
Airtac SAIJ40 Adjustable Cylinder SAIJ40AX90-75 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40AX90-75 |
|---|---|
| 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 SAIJ40AX90-75
| 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 SAIJ40AX90-75 Is Used
Machine Changeover
Dial in the exact retract distance from 15 to 90 mm during product size changes without replacing the cylinder or adding external stopper blocks.
End-Position Tuning
Fine-tune the final end-stop at commissioning to compensate for mechanical tolerances, using the rear screw rather than re-shimming the fixture.
Variable Forming Stops
Adjust the stroke window on the fly for a press or forming station that handles multiple material lengths within the 90 mm travel limit.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40AX90-75 the Right Cylinder?
Select this 40 mm bore model when your application requires a highly variable retract position within a compact 90 mm total travel envelope. If you need less adjustment range and higher force, stepping up to the 50 mm bore yields 982 N of push force at 0.5 MPa. Conversely, if your force requirements are lower, the 32 mm bore provides 402 N of push force. Because the stroke is under 300 mm, side-load stress on the 16 mm rod and M12x1.25 rod thread is manageable, though an external guide remains recommended for heavy lateral loads.
When replacing an ISO 15552 cylinder, match the 40 mm bore, 90 mm stroke, 75 mm adjustment range, PT port thread, and standard mounting interface. This SAIJ model uses a reduced mounting accessory set including Basic, FA, LB, TC, FTC, TCM1, and TCM2, deliberately omitting FB, CA, CB, and CR brackets. It lacks a magnet for position sensing; if you require end-of-stroke feedback, specify the -S option to enable compatibility with AirTAC CMSE reed and DMSE solid-state sensors.
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 SAIJ40AX90-75 FAQ
The rear adjuster acts as a mechanical stop that shortens the effective stroke. For this model, you can trim the nominal 90 mm stroke back by up to 75 mm, giving an adjustable travel window of 15 to 90 mm. It acts as a travel stop and does not lock or hold the load without continuous air pressure.
At 0.5 MPa operating pressure, this 40 mm bore cylinder generates 628 N of push force and 528 N of pull force. At 0.7 MPa, the push force increases to 879 N.
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