Airtac SAIJ40 Adjustable Cylinder SAIJ40BX90-30
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX90-30 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 SAIJ40BX90-30
The AirTAC SAIJ40X90-30 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a nominal 90 mm stroke that can be fine-tuned down by up to 30 mm, yielding a practical 60-90 mm travel window. Delivering 628 N of push force at 0.5 MPa, it bridges the gap between compact 32 mm bores and heavier 50 mm units.
This variant features a SUS304 stainless steel rod for superior corrosion resistance and uses PT tapered port threads with a G1/4 connection. The extruded aluminum barrel includes dual sensor grooves, allowing you to fit CMSE reed or DMSE electronic switches if position feedback is later required.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX90-30 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX90-30 |
|---|---|
| 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 SAIJ40BX90-30
| 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 SAIJ40BX90-30 Is Used
Product Changeovers
Dial in the 60-90 mm travel window during format changes to accommodate different packaging sizes without mechanical rebuilds.
End-Stop Tuning
Fine-tune the retract position at machine commissioning to perfect alignment and avoid hard mechanical crashes.
Assembly Pressing
Leverage the 628 N push force for light-duty pressing tasks where the exact insertion depth must be tweaked on the fly.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX90-30 the Right Cylinder?
Select this 40 mm bore when an application demands 628 N push force at 0.5 MPa but does not warrant the 982 N capacity of a 50 mm unit. The 30 mm adjustment window is perfect for machines requiring rapid product changeovers, allowing operators to dial in the exact end position without swapping cylinders or adding external stops. Remember that the rear adjuster acts only as a travel stop; it will not hold a load without live air pressure, so consider a SAIL or BSAI cylinder if true locking is required.
For an exact ISO 15552 replacement, verify the 90 mm stroke, 30 mm adjustment range, PT port threads, and your preferred mounting style from the available SAIJ set: Basic, FA, LB, TC, FTC, TCM1, or TCM2. The M12x1.25 rod thread handles moderate side loads well, though long unsupported strokes should still rely on external guide rails.
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 SAIJ40BX90-30 FAQ
At 0.5 MPa operating pressure, this 40 mm bore cylinder provides 628 N of push force and 528 N of pull force. It can reach up to 1130 N push force at its maximum 0.9 MPa pressure.
The rear adjuster screw acts as a mechanical stop, allowing you to shorten the 90 mm nominal stroke by up to 30 mm. This creates a 60-90 mm usable travel window for fine-tuning the retract end position without replacing the cylinder.
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