Airtac SAIJ40 Adjustable Cylinder SAIJ40AX45-20
The AirTAC SAIJ40 Adjustable Cylinder SAIJ40AX45-20 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 45mm 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
- Stroke45 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 SAIJ40AX45-20
The AirTAC SAIJ40X45-20 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a nominal 45mm stroke that can be dialed back by up to 20mm, yielding a highly versatile 25-45mm usable travel window for precise end-position tuning.
It features a SUS420J2 stainless steel rod for improved corrosion resistance and uses PT tapered port threads. Mounting options include Basic, FA, LB, TC, FTC, TCM1, and TCM2.
Airtac SAIJ40 Adjustable Cylinder SAIJ40AX45-20 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40AX45-20 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 45 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 SAIJ40AX45-20
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×45 | 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 SAIJ40AX45-20 Is Used
Machine Changeover
Dial in the exact 25-45mm retract position during product size changes on a packaging line without swapping out the entire actuator.
End-Stop Calibration
Fine-tune the final end-position at machine commissioning by trimming the stroke up to 20mm to avoid crushing delicate workpieces.
Variable Assembly Stops
Provide adaptable physical stops for automated assembly stations where multiple slightly different part heights are processed on the same fixture.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40AX45-20 the Right Cylinder?
The adjustable 25-45mm travel window is selected over a fixed SAI cylinder when you need to fine-tune the retract end-stop during machine commissioning or product changeover without adding external physical stops.
Because the rear adjuster acts only as a travel stop to set deceleration, it does not hold the load dynamically without live air. For true load-holding without continuous pressure, consider an AirTAC SAIL (pneumatic lock) or BSAI (clamp-lock) cylinder. This model is dimensionally interchangeable per ISO 15552, configured with a 45mm stroke, 20mm adjustment, PT G1/4 ports, and no sensor magnet.
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 SAIJ40AX45-20 FAQ
If you increase the pressure to 0.7 MPa, the push force rises to 879N.
The rear adjuster screw acts as an external stopper that lets you shorten the nominal 45mm stroke by up to 20mm. This creates a 25-45mm usable travel window, allowing you to set the exact retract end-position without replacing the cylinder.
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Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models are processed and dispatched in 3-5 business days.
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Most inquiries answered within 7-8 hours.
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