Airtac SAIJ40 Adjustable Cylinder SAIJ40AX90-20
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40AX90-20 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 SAIJ40AX90-20
The AirTAC SAIJ40X90-20 is a double-acting, single-rod ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a nominal 90 mm travel that can be fine-tuned down by 20 mm, giving you a precise 70-90 mm usable window to dial in end positions during commissioning. In the 40 mm bore class, it delivers 628 N of push force and 528 N of pull force at 0.5 MPa.
This SKU is built with an SUS420J2 stainless steel rod for enhanced corrosion resistance and uses PT tapered port threads with a G1/4 connection. The extruded aluminum barrel incorporates sensor grooves on both sides for flexible switch mounting. It supports AirTAC CMSE reed and DMSE electronic sensors, though this specific configuration does not include a magnet.
Airtac SAIJ40 Adjustable Cylinder SAIJ40AX90-20 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40AX90-20 |
|---|---|
| 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 SAIJ40AX90-20
| 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 SAIJ40AX90-20 Is Used
Machine Changeover
Quickly adjust the 70-90 mm travel window to accommodate new product sizes on a packaging line without replacing the cylinder.
End-Position Tuning
Fine-tune the retract end-stop during commissioning to perfect the seating of a 628 N press fit without external shims.
Variable Stops
Dial in the exact rejection distance for a diverter arm, using the rear screw to shorten the stroke precisely as needed.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40AX90-20 the Right Cylinder?
Choose this 40 mm bore cylinder when an application requires 628 N of thrust at 0.5 MPa but might need minor end-position tweaks; if you need less force, step down to the 32 mm bore (402 N push), or step up to the 50 mm bore (982 N push) for heavier loads. The adjustable rear stopper allows you to trim the stroke within the 70-90 mm window without swapping the cylinder or adding external stops, which is ideal for product changeovers. Remember that the rear adjuster acts only as a travel stop and does not hold the load without live air; for true load-holding without pressure, consider an external rod lock or the AirTAC SAIL series.
To match this ISO 15552 dimensionally interchangeable cylinder for replacement, verify the 40 mm bore, 90 mm nominal stroke, 20 mm adjustment range, PT G1/4 port, and the reduced SAIJ mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2—omitting FB, CA, CB, CR).
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 SAIJ40AX90-20 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 of push force at 0.9 MPa.
The rear adjuster screw acts as a mechanical stop that lets you shorten the 90 mm nominal stroke by up to 20 mm, creating a 70-90 mm usable travel window. It sets the end position but does not lock the load without continuous air pressure.
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