Airtac SAIJ40 Adjustable Cylinder SAIJ40BX90-40S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX90-40S 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 SAIJ40BX90-40S
The AirTAC SAIJ40X90-40-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that trims the effective travel, creating a precise 50-90 mm usable window. It delivers 879N of push force at 0.7 MPa and pulls 528N at 0.5 MPa. The stainless SUS304 rod material offers high corrosion resistance for demanding environments.
Equipped with a magnet for position sensing, this unit integrates seamlessly with AirTAC CMSE reed and DMSE electronic solid-state switches housed in the dual-side sensor grooves. The PT tapered port thread ensures a tight pneumatic connection, while the adjustable stopper allows rapid end-position tuning during product changeovers without adding external stops.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX90-40S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX90-40S |
|---|---|
| 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 SAIJ40BX90-40S
| 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 SAIJ40BX90-40S Is Used
Changeover Calibration
Dial in the exact 50-90mm stroke window during machine setup to accommodate different product sizes without swapping cylinders.
Variable End Stops
Set precise retract positions for machining operations where external hard stops are impractical or require frequent adjustment.
Corrosive Assembly Lines
Leverage the SUS304 stainless rod in washdown or humid manufacturing environments while maintaining standard ISO mounting dimensions.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX90-40S the Right Cylinder?
Choose this 40mm bore when an application requires mid-range force and exact end-stop calibration; if you need less force, the 32mm bore offers 563N at 0.7 MPa, or step up to the 50mm bore for 1374N. The adjustable rear screw is strictly a travel stop, not a locking device, meaning it cannot hold a load without live air pressure. For true fail-safe load holding, consider the SAIL or BSAI series instead. To match this ISO 15552 replacement, specify: 40mm bore, 90mm stroke, 40mm adjustment, PT port thread, SUS304 rod, and the -S magnet.
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 SAIJ40BX90-40S FAQ
At 0.7 MPa, this 40mm bore cylinder provides 879N of push force and 724N of pull force. It can deliver up to 1130N push force at 0.9 MPa.
The rear adjuster acts as a mechanical stop that shortens the 90mm nominal stroke by up to 40mm, creating a usable travel window of 50-90mm. It requires live air to move and does not lock the load in place.
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