Airtac SAIJ80 Adjustable Cylinder SAIJ80BX550-40
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80BX550-40 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 SAIJ80BX550-40
The AirTAC SAIJ80X550-40 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It delivers 2513N of thrust at 0.5 MPa and uses a 25mm SUS304 stainless steel rod with a PT G3/8 tapered port. The integrated rear stopper allows you to trim the effective travel, creating a 510 to 550mm usable window for precise end-position tuning.
Because the barrel extends to 550mm, the 25mm rod and M20x1.5 thread provide robust support, but an external guide is still recommended to manage side loads on long strokes. The extruded aluminum barrel includes sensor grooves on both sides for standard switches, and this configuration omits the FB, CA, CB, and CR mounts, utilizing a reduced set of Basic, FA, LB, TC, FTC, TCM1, and TCM2 interfaces.
Airtac SAIJ80 Adjustable Cylinder SAIJ80BX550-40 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80BX550-40 |
|---|---|
| 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 SAIJ80BX550-40
| 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 SAIJ80BX550-40 Is Used
Product Changeover
Dial in the 510 to 550mm stroke window during packaging line format changes to accommodate varying carton sizes without swapping hardware.
End-Stop Tuning
Fine-tune the retract position during machine commissioning to align a 2513N press operation perfectly with the workpiece.
Variable Diverting
Adjust the travel end on the fly to position a diverter arm accurately for different product widths moving down a handling line.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX550-40 the Right Cylinder?
Choose this 80mm bore when a 50mm bore yields insufficient force (982N at 0.5 MPa) or when a 100mm bore is excessive (3927N at 0.5 MPa). The 40mm adjustment range is selected over a fixed-stroke SAI when a machine requires variable end-stops or product changeovers without physically swapping the cylinder or adding external stops. The rear screw acts purely as a travel stop and works with the variable air cushions to decelerate the load; it does not hold the load without live air. For position holding, consider an external pilot-operated check valve or the SAIL lock cylinder. This unit is dimensionally interchangeable per ISO 15552 and includes a PT G3/8 port.
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 SAIJ80BX550-40 FAQ
At 0.5 MPa operating pressure, this 80mm bore cylinder provides 2513N of push force and 2268N of pull force. It can deliver up to 4523N of push force at 0.9 MPa.
The rear adjuster screw acts as a mechanical stop that lets you shorten the 550mm nominal stroke by up to 40mm, providing a usable travel window of 510 to 550mm. It functions as a travel stop alongside the air cushions and does not lock the load without live air pressure.
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