Airtac SAIJ40 Adjustable Cylinder SAIJ40BX90-75S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX90-75S 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 SAIJ40BX90-75S
The AirTAC SAIJ40X90-75-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to fine-tune the travel window from 15 to 90 mm without adding external stops. Delivering 628 N of push force at 0.5 MPa, it bridges the gap between compact 32mm and standard 50mm bores. This version includes a SUS304 stainless steel rod for superior corrosion resistance and a PT tapered port thread.
Because the adjustment range is a massive 75 mm on a 90 mm nominal stroke, you can radically alter the end-of-travel position during machine changeover. The extruded aluminum barrel includes sensor grooves on both sides, and the integrated -S magnet works seamlessly with AirTAC CMSE reed and DMSE electronic solid-state switches for precise position feedback.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX90-75S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX90-75S |
|---|---|
| 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 SAIJ40BX90-75S
| 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 SAIJ40BX90-75S Is Used
Product Size Changeovers
Rapidly adapt end-stops for varying package sizes on a packaging line using the wide 75mm adjustment window.
Prototyping & R&D
Dial in exact travel distances during machine development without machining custom spacers or swapping cylinders.
Corrosive Environments
Leverage the SUS304 stainless steel rod for reliable actuation in washdown or mildly corrosive manufacturing settings.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX90-75S the Right Cylinder?
Selecting this 40mm bore makes sense when you need higher force than a 32mm cylinder (402 N at 0.5 MPa) but want a tighter footprint than a 50mm option (982 N at 0.5 MPa). The massive 75mm adjustment range is ideal for prototyping or lines running multiple product sizes, letting you dial in the exact end-stop on the fly instead of swapping out a fixed-stroke SAI cylinder. Note that the rear adjuster acts purely as a mechanical stop; it does not lock or hold the load without live air pressure. For fail-safe load holding, consider the SAIL or BSAI series.
When replacing an ISO 15552 cylinder, match the 40mm bore, 90mm stroke, 75mm adjustment, PT G1/4 ports, and the -S magnet requirement. Mounting options are limited to Basic, FA, LB, TC, FTC, TCM1, and TCM2. Since the 90mm stroke is under 300mm, side-load risks are minimal, but the 16mm rod and M12x1.25 thread still handle moderate side loads effectively when properly guided.
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 SAIJ40BX90-75S FAQ
The rear adjuster screw acts as a mechanical stop, allowing you to shorten the effective stroke from 90 mm down to as little as 15 mm. It decelerates the travel end but does not lock the load without continuous air pressure.
At an operating pressure of 0.5 MPa, the SAIJ40X90-75-S provides 628 N of push force and 528 N of pull force. It operates at speeds between 30 and 800 mm/s.
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