Airtac SAIJ40 Adjustable Cylinder SAIJ40AX75-30
The AirTAC SAIJ40 Adjustable Cylinder SAIJ40AX75-30 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 75mm 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
- Stroke75 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 SAIJ40AX75-30
The AirTAC SAIJ40X75-30 is a double-acting ISO 15552 profile cylinder featuring a rear mechanical stopper that allows you to fine-tune the effective travel. With a 75 mm nominal stroke and a 30 mm adjustment range, you can dial back the end position to anywhere within a 45-75 mm usable window during commissioning.
This variant uses a SUS420J2 stainless steel piston rod (option A) for enhanced corrosion resistance compared to standard carbon steel. It features PT tapered port threads (G1/4) and lacks a standard magnet, meaning it is not compatible with CMSE or DMSE sensors out of the box. The mounting interface supports Basic, FA, LB, TC, FTC, TCM1, and TCM2 brackets, deliberately omitting FB, CA, CB, and CR styles.
Airtac SAIJ40 Adjustable Cylinder SAIJ40AX75-30 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40AX75-30 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 75 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 SAIJ40AX75-30
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×75 | 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 SAIJ40AX75-30 Is Used
Machine Changeover
Quickly reposition the retract end-stop within the 45-75 mm window when switching a packaging line to a different product size, eliminating the need to physically swap cylinders.
End-Position Tuning
Dial in the exact end-of-stroke location during initial setup to compensate for mechanical tolerance stack-ups without adding bulky external stopper blocks.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40AX75-30 the Right Cylinder?
Select this 40 mm bore cylinder when an application requires a variable end-stop rather than a fixed 75 mm stroke. The rear adjuster is strictly a travel stop, not a lock, so it cannot hold a load without live air pressure. For positive holding without air, consider an AirTAC SAIL or BSAI cylinder.
To replace a standard ISO 15552 cylinder with this SAIJ40X75-30, match the 40 mm bore, 75 mm nominal stroke, PT G1/4 port thread, and the required mounting bracket. Because the rod diameter is 16 mm with an M12x1.25 thread, it handles side loads well, but any stroke over 300 mm would require an external guide to prevent rod binding.
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 SAIJ40AX75-30 FAQ
The rear adjuster screw acts as a mechanical stop that lets you shorten the effective stroke by up to 30 mm. This creates a usable travel window of 45-75 mm, allowing you to fine-tune the retract position without replacing the cylinder.
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Covers non-human-caused product damage.
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Standard models are processed and dispatched in 3-5 business days.
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