Airtac SAIJ40 Adjustable Cylinder SAIJ40AX90-30S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40AX90-30S 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 SAIJ40AX90-30S
The AirTAC SAIJ40X90-30-S is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a usable travel window of 60 to 90 mm, letting you dial back the nominal 90 mm stroke by up to 30 mm during machine setup or product changeover without adding external stops. In the 40 mm bore class, it delivers 628 N of push force and 528 N of pull force at a 0.5 MPa operating pressure.
This variant includes a standard piston magnet (-S) for use with AirTAC CMSE reed and DMSE solid-state sensors, which seat directly into the dual-side sensor grooves on the extruded aluminum barrel. It features a SUS420J2 stainless steel rod (option A) for improved corrosion resistance, PT tapered ports sized at G1/4, and adjustable air cushions at both ends to decelerate the moving load.
Airtac SAIJ40 Adjustable Cylinder SAIJ40AX90-30S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40AX90-30S |
|---|---|
| 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 SAIJ40AX90-30S
| 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 SAIJ40AX90-30S Is Used
Machine Changeover
Dial in the exact retract distance within the 60-90 mm window when switching a packaging line to a different product format, eliminating the need to swap cylinders.
Commissioning Fine-Tune
Trim the extend position by up to 30 mm during initial setup to perfectly time a pressing or indexing operation without machining external stopper blocks.
Variable End Stops
Adjust the rear mechanical stop to synchronize multi-cylinder assemblies, ensuring precise alignment of sensor targets and workpiece locators.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40AX90-30S the Right Cylinder?
Choose this adjustable-stroke model when your fixture requires exact end-position tuning at commissioning or frequent product-size changes, rather than relying on a fixed-stroke SAI cylinder. If your application requires slightly less force, stepping down to a 32 mm bore yields 402 N of push force at 0.5 MPa; stepping up to a 50 mm bore provides 982 N. The 16 mm rod and M12x1.25 thread handle moderate side loads well, but for this 90 mm stroke, always guide the load to prevent rod binding.
The rear adjuster acts purely as a mechanical travel stop to set the retract position and cannot hold a load without continuous air pressure. For true load-holding without live air, select an AirTAC SAIL pneumatic lock or BSAI clamp-lock cylinder instead. To match this ISO 15552 footprint, specify a 40 mm bore, 90 mm stroke, 30 mm adjustment, PT G1/4 ports, Basic/FA/LB/TC/FTC/TCM1/TCM2 mountings, and the -S magnet option.
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 SAIJ40AX90-30S FAQ
A rear adjusting screw acts as a mechanical stop, allowing you to shorten the effective stroke from 90 mm down to as little as 60 mm. This provides a 30 mm tuning window for setting exact end positions without changing the cylinder itself.
At 0.5 MPa, the SAIJ40X90-30-S generates 628 N of push force and 528 N of pull force. At the maximum operating pressure of 1.0 MPa, the push force reaches 128 kgf.
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