Airtac SAIJ80 Adjustable Cylinder SAIJ80AX900-50S
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80AX900-50S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 900mm 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
- Stroke900 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX900-50S
The AirTAC SAIJ80X900-50-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that trims the effective travel back by up to 50 mm, yielding a usable window of 850 to 900 mm. Delivering 2268 N of pull force at 0.5 MPa, it is built around an extruded aluminum barrel with sensor grooves on both sides and a SUS420J2 stainless steel rod for enhanced corrosion resistance.
This rear stopper mechanism allows for fine end-position tuning during commissioning without swapping the cylinder or bolting on external stops. It includes a magnet for position detection and uses PT tapered ports, while the variable air cushions at both ends manage end-of-stroke deceleration.
Airtac SAIJ80 Adjustable Cylinder SAIJ80AX900-50S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80AX900-50S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 900 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 SAIJ80AX900-50S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×900 | 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 SAIJ80AX900-50S Is Used
Variable End Stops
Dial in the precise 850 to 900 mm end position during machine setup to accommodate different product lengths without changing hardware.
Line Changeover
Quickly adjust the stroke on packaging or conveying lines to handle varying package sizes on the fly.
Fine Position Tuning
Trim the retract position by up to 50 mm during commissioning to align tooling perfectly without adding mechanical shims.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX900-50S the Right Cylinder?
Choose this 80 mm bore when a 50 mm bore falls short on thrust, offering 825 N pull at 0.5 MPa compared to this unit's 2268 N. The 50 mm adjustment range is ideal for product changeovers on a line, allowing variable end stops without replacing the cylinder. Because the rear adjuster and air cushions only set the travel end and deceleration, they do not hold the load without live air; for true load-holding without pressure, consider an external rod lock or the SAIL/BSAI series.
At 900 mm of travel, the 25 mm rod diameter and M20x1.5 thread provide robust support, but the extended stroke means an external guide is strongly recommended to prevent side-load damage. To replace an ISO 15552 cylinder, match the 80 mm bore, 900 mm stroke, 50 mm adjustment, PT G3/8 port, and the -S magnet for CMSE or DMSE sensor compatibility.
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 SAIJ80AX900-50S FAQ
At 0.5 MPa it provides 2513 N of push force and 2268 N of pull force, reaching a maximum of 513 kgf at 1.0 MPa.
The rear adjuster screw acts as a mechanical stop that shortens the nominal 900 mm stroke by up to 50 mm, giving an adjustable travel window of 850 to 900 mm. It is a stop, not a lock, and requires live air to maintain position.
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