Airtac SAIJ80 Adjustable Cylinder SAIJ80AX400-40
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80AX400-40 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 400mm stroke, G3/8 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ80 mm
- Stroke400 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX400-40
The AirTAC SAIJ80X400-40 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, designed to fine-tune the retract end position without external stops. It provides a usable travel window of 360 to 400 mm, allowing you to dial back the nominal stroke by up to 40 mm during commissioning. Built with an SUS420J2 stainless steel rod and PT tapered ports, it delivers a robust 4523 N push force at 0.9 MPa.
This extruded aluminum profile cylinder features variable air cushions at both ends to decelerate the load smoothly. The rear adjuster functions strictly as a mechanical travel stop for end-position tuning, not as a locking device, so the cylinder cannot hold a load without live air pressure. It uses a reduced mounting subset of Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting the FB, CA, CB, and CR options.
Airtac SAIJ80 Adjustable Cylinder SAIJ80AX400-40 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80AX400-40 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 400 mm |
| Acting type | Double acting |
| Port size | G3/8 |
| Rod thread | M20×1.5 |
| 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, 36 mm |
| Max stroke | Up to 1500 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 (Ø80mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 2513 N | 2268 N |
| 0.7 MPa | 3519 N | — |
| Max (@1.0 MPa) | 513 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ80 Adjustable Cylinder SAIJ80AX400-40
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×400 | 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 SAIJ80 Adjustable Cylinder SAIJ80AX400-40 Is Used
Machine Changeover
Dial in the retract position by up to 40 mm during product size transitions without physically replacing the cylinder or adding external stopper blocks.
End-Stop Tuning
Achieve precise 360 to 400 mm travel endpoints during commissioning to perfect the seating and alignment of tooling.
Assembly Line Indexing
Provides 2513 N of pull force at 0.5 MPa to move heavy pallets, with adjustable cushioning to handle the 400 mm travel speed smoothly.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX400-40 the Right Cylinder?
Choose this 80 mm bore when your application requires the 2513 N pull force at 0.5 MPa, stepping up from a 63 mm bore that provides 1559 N push force. The adjustable stroke is ideal for machine setups requiring variable end stops or product changeovers, avoiding the need to swap out a fixed-stroke SAI cylinder. For a drop-in ISO 15552 replacement, match the 80 mm bore, 400 mm stroke, 40 mm adjustment, PT G3/8 ports, and the chosen mounting hardware.
Because the 400 mm stroke is substantial, the 25 mm rod diameter and M20x1.5 rod thread provide rigidity, but an external guide is still recommended to prevent excessive side-loading on the piston. If your setup requires true load-holding without continuous air pressure, consider the SAIL or BSAI series instead of relying on the adjuster or cushions.
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 SAIJ80 Adjustable Cylinder SAIJ80AX400-40 FAQ
The rear adjuster acts as a mechanical stop that lets you shorten the effective travel from 400 mm down to 360 mm. It is used for fine-tuning end positions at commissioning, but it is not a lock and will not hold the load without live air pressure.
At an operating pressure of 0.9 MPa, this 80 mm bore cylinder provides a push force of 4523 N and a pull force of 4071 N. It operates at speeds between 30 and 800 mm/s.
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