Airtac SAIJ40 Adjustable Cylinder SAIJ40AX185-75
The AirTAC SAIJ40 Adjustable Cylinder SAIJ40AX185-75 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 185mm stroke, G1/4 air ports and adjustable end cushioning. Its standardized mounting interface makes it interchangeable with other ISO 15552 cylinders at the mounting interface.
- BoreØ40 mm
- Stroke185 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40AX185-75
The AirTAC SAIJ40X185-75 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to fine-tune the travel window down from a 185 mm nominal stroke to a 110-185 mm effective range. The extruded aluminum barrel includes sensor grooves on both sides, providing a standardized mounting interface that is dimensionally interchangeable per ISO 15552.
This specific SKU is configured with an SUS420J2 stainless steel rod (material code A) for improved corrosion resistance in harsher environments. The rear adjustment mechanism acts purely as a mechanical stop to set the end position and relies on the variable air cushion at both ends for deceleration; it does not lock or hold the load without live air pressure. The SAIJ mounting set omits FB, CA, CB, and CR brackets, offering Basic, FA, LB, TC, FTC, TCM1, and TCM2 options.
Airtac SAIJ40 Adjustable Cylinder SAIJ40AX185-75 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40AX185-75 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 185 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 | 528 N | 528 N |
| 0.7 MPa | 739 N | — |
| Max (@1.0 MPa) | 108 kgf | |
Double-rod model: the rod passes through the rear cover, so both piston faces lose rod area and push is shown at the annular-area value. Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ40 Adjustable Cylinder SAIJ40AX185-75
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×185 | 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 SAIJ40AX185-75 Is Used
Machine Changeover
Dial in the 110-185 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 at commissioning to hit exact stopping points, relying on the 30 mm cushion to decelerate the load smoothly.
Corrosive Assembly Lines
Leverage the SUS420J2 stainless steel rod option to maintain reliable actuation in washdown or mildly corrosive industrial environments.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40AX185-75 the Right Cylinder?
Choose this 40 mm bore adjustable-stroke model when your application requires a 110-185 mm travel window and precise end-position tuning during commissioning without swapping out the entire cylinder. Because the nominal stroke is 185 mm, an external guide is recommended to support the rod and prevent excessive side-loading.
The rear adjuster screw allows you to dial in the exact retract distance during product changeovers on a line, acting as a travel stop rather than a load-holding brake. For applications that require the cylinder to maintain its position without continuous live air pressure, you should look at the SAIL pneumatic lock series or the BSAI clamp-lock variant instead. This model uses a PT tapered port thread and lacks a magnet, so it will not work with CMSE or DMSE sensors without a -S magnet suffix.
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 SAIJ40AX185-75 FAQ
It operates at speeds between 30 and 800 mm/s.
The rear adjuster acts as a mechanical stop that lets you trim the 185 mm nominal stroke back by up to 75 mm, creating a 110-185 mm usable travel window. It sets the end position but does not hold the load without live air pressure.
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Covers non-human-caused product damage.
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