Airtac SAIJ40 Adjustable Cylinder SAIJ40AX90-20S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40AX90-20S 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 SAIJ40AX90-20S
The AirTAC SAIJ40X90-20-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers 628N of push force at 0.5 MPa and features a 16mm SUS420J2 stainless steel rod. The integrated -S magnet enables position sensing with AirTAC CMSE reed and DMSE electronic switches housed in the dual-side sensor grooves.
With a 90mm nominal stroke and a 20mm adjustment range, this model provides a usable travel window of 70-90mm. You can fine-tune the retract end-position at commissioning without adding external stops. The rear adjuster acts purely as a travel stop and does not hold the load without live air pressure.
Airtac SAIJ40 Adjustable Cylinder SAIJ40AX90-20S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40AX90-20S |
|---|---|
| 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 SAIJ40AX90-20S
| 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 SAIJ40AX90-20S Is Used
Machine Changeover
Dial in the 70-90mm travel window during product size changes to set precise retract positions without physically swapping cylinders.
End-Stop Tuning
Fine-tune the final resting position of a fixture at commissioning using the rear adjuster, avoiding the need for external mechanical stops.
Assembly Line Feed
Pushes parts with 628N force at 0.5 MPa while allowing operators to tweak the stroke length on the fly for different component heights.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40AX90-20S the Right Cylinder?
Choose this 40mm bore when an application requires 628N push force at 0.5 MPa, stepping up from a 32mm bore (402N) or down from a 63mm bore (1559N). The adjustable 70-90mm travel window is ideal for product changeovers on a line, allowing you to dial in the exact end-stop without swapping the cylinder for a fixed-stroke SAI variant.
For replacement, match the 40mm bore, 90mm nominal stroke, 20mm adjust code, PT tapered port thread, and -S magnet. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR. If your setup requires load-holding without continuous air pressure, use an external rod lock or pilot-operated check valve, or select an AirTAC SAIL or BSAI cylinder.
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 SAIJ40AX90-20S FAQ
At 0.5 MPa operating pressure, this 40mm bore cylinder provides 628N of push force and 528N of pull force. At 0.7 MPa, the push force increases to 879N.
The rear adjuster screw lets you mechanically shorten the 90mm nominal stroke, providing a usable travel window of 70-90mm. This stopper sets the end position but does not lock the load without live air pressure.
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