Airtac SAIJ40 Adjustable Cylinder SAIJ40AX90-40S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40AX90-40S 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 SAIJ40AX90-40S
The AirTAC SAIJ40X90-40-S 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 backward by up to 40 mm, creating a usable travel window of 50 to 90 mm. Delivering 628 N of push force at 0.5 MPa, it is equipped with a SUS420J2 stainless steel rod (code A) for enhanced corrosion resistance and a built-in magnet (-S) for position sensing.
This adjustable design allows you to set exact end positions at commissioning without adding external stops. The extruded aluminum barrel includes sensor grooves on both sides, supporting AirTAC CMSE reed and DMSE electronic switches. It uses a PT G1/4 port and offers variable air cushions at both ends to decelerate the load smoothly.
Airtac SAIJ40 Adjustable Cylinder SAIJ40AX90-40S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40AX90-40S |
|---|---|
| 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 SAIJ40AX90-40S
| 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 SAIJ40AX90-40S Is Used
Changeover Calibration
Dial in the 50-90 mm travel window precisely during product size changeovers without swapping hardware.
Variable End-Stop Machining
Set exact retract positions for multi-stage clamping or machining operations directly at the rear screw.
Sensor-Driven Sorting
Leverage the -S magnet with DMSE electronic sensors to confirm stroke positions in automated sorting lines.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40AX90-40S the Right Cylinder?
Choose this 40 mm bore when you need more power than the 32 mm version (402 N push at 0.5 MPa) but want a lighter footprint than the 50 mm class (982 N). The 40 mm adjustment range on a 90 mm stroke is exceptionally wide, making it ideal for machines requiring highly variable end-stops during product changeovers. For exact drop-in compatibility, match your bore, 90 mm stroke, 40 mm adjuster, PT G1/4 port, and the -S magnet requirement.
Because the stroke is under 300 mm, side-load stress on the 16 mm rod is manageable without external guides, though long unsupported loads still require careful alignment. Remember that the rear adjuster is a travel stop, not a locking device; this cylinder cannot hold a load without live air. For pneumatic load-holding, consider the SAIL or BSAI series instead. Mounting options include Basic, FA, LB, TC, FTC, TCM1, and TCM2.
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 SAIJ40AX90-40S FAQ
At 0.5 MPa operating pressure, this 40 mm bore cylinder provides 628 N of push force and 528 N of pull force. At 0.7 MPa, the push force increases to 879 N.
The rear adjuster screw allows you to shorten the 90 mm nominal stroke by up to 40 mm, providing an effective travel range of 50 to 90 mm. This stopper fine-tunes the end position but does not lock the load without continuous air pressure.
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