Airtac SAIJ40 Adjustable Cylinder SAIJ40BX90-40
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX90-40 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 SAIJ40BX90-40
The AirTAC SAIJ40X90-40 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that creates a usable travel window of 50 to 90 mm. It delivers 628 N of push force and 528 N of pull force at 0.5 MPa, utilizing a 16 mm piston rod with an M12x1.25 thread. The extruded aluminum barrel includes sensor grooves on both sides for straightforward position feedback.
Equipped with a SUS304 stainless steel rod and PT tapered port threads, this unit is built for durability. The rear adjuster acts purely as a mechanical stop for fine-tuning end positions during commissioning; it does not hold the load without live air pressure. For applications requiring position holding without continuous air, consider the SAIL or BSAI series.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX90-40 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX90-40 |
|---|---|
| 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 SAIJ40BX90-40
| 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 SAIJ40BX90-40 Is Used
Machine Changeover
Dial in the 50-90 mm travel window during product size changes without physically replacing the cylinder or adding external stopper blocks.
End-Position Tuning
Fine-tune the retract stroke end during initial commissioning to compensate for mechanical tolerances in your fixture setup.
Variable End Stops
Adjust the rear mechanical stop on the fly to test different actuation distances for prototyping and flexible assembly lines.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX90-40 the Right Cylinder?
Choose this 40 mm bore adjustable-stroke cylinder when your application requires variable end stops or frequent product changeovers, avoiding the need to physically swap out a fixed-stroke SAI cylinder. If your setup demands less force, stepping down to a 32 mm bore yields 402 N of push force at 0.5 MPa. Conversely, upgrading to a 50 mm bore provides 982 N of push force for heavier loads.
When replacing an ISO 15552 cylinder, match the 40 mm bore, 90 mm nominal stroke, 40 mm adjustment range, PT G1/4 port, and the desired mounting accessory from the SAIJ subset (Basic, FA, LB, TC, FTC, TCM1, TCM2). Because this model lacks an -S magnet, it cannot host CMSE reed or DMSE electronic sensors without modification. At a 90 mm stroke, side-loading is minimal, but always ensure proper alignment to maximize seal life.
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 SAIJ40BX90-40 FAQ
At an operating pressure of 0.5 MPa, this 40 mm bore cylinder provides 628 N of push force and 528 N of pull force. At the maximum operating pressure of 1.0 MPa, it can deliver up to 128 kgf.
The rear adjuster screw lets you shorten the nominal 90 mm stroke by up to 40 mm, creating a usable travel window of 50 to 90 mm. The adjuster functions strictly as a travel stop and does not lock or hold the load without continuous air pressure.
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