Airtac SAIJ80 Adjustable Cylinder SAIJ80BX550-20
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80BX550-20 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 550mm 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
- Stroke550 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX550-20
The AirTAC SAIJ80X550-20 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that creates a 530-550 mm usable travel window. Delivering 2513 N of push force at 0.5 MPa, it is built with a SUS304 stainless steel rod for superior corrosion resistance. The PT tapered port threads ensure a reliable, leak-free pneumatic connection.
This adjustable-stroke design allows you to fine-tune the retract end position during commissioning without adding external stops. The 25 mm rod and M20x1.5 thread provide robust side-load capability, though the 550 mm stroke requires an external guide to prevent rod deflection. It uses a reduced mounting set of Basic, FA, LB, TC, FTC, TCM1, and TCM2.
Airtac SAIJ80 Adjustable Cylinder SAIJ80BX550-20 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80BX550-20 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 550 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 SAIJ80BX550-20
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×550 | 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 SAIJ80BX550-20 Is Used
Variable End-Stop Tuning
Dial in the exact retract position within the 530-550 mm window during machine commissioning without swapping cylinders or adding bulky external stopper blocks.
Product Size Changeover
Quickly adapt a packaging line for different carton lengths by turning the rear adjuster, saving setup time and eliminating the need for fixed SAI cylinders.
Corrosive Environment Actuation
Leverage the SUS304 stainless steel rod for pushing and pulling tasks in washdown or mildly corrosive manufacturing settings where carbon steel rods would fail.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX550-20 the Right Cylinder?
Choose this 80 mm bore when a 50 mm bore (982 N push at 0.5 MPa) lacks thrust or a 100 mm bore (3927 N) is excessive. The 20 mm rear adjuster is ideal for variable end-stops and product changeovers, unlike a fixed-stroke SAI cylinder. For a 550 mm stroke, an external guide is strongly recommended to manage side loads.
This standard profile cylinder does not hold loads without live air, as the rear adjuster is a travel stop, not a lock. For dead-air load holding, consider an AirTAC SAIL or BSAI cylinder. To match this ISO 15552 replacement, specify: 80 mm bore, 550 mm stroke, 20 mm adjustment, PT port threads, SUS304 rod, and no 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 SAIJ80 Adjustable Cylinder SAIJ80BX550-20 FAQ
At 0.5 MPa operating pressure, this 80 mm bore cylinder provides 2513 N of push force and 2268 N of pull force. At 0.7 MPa, the push force increases to 3518 N.
The rear adjuster acts as a mechanical stop, allowing you to shorten the effective stroke by up to 20 mm. This creates a 530-550 mm travel window for fine-tuning the end position at commissioning. It is a stop, not a lock, and requires live air to hold the load.
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