Airtac SAIJ80 Adjustable Cylinder SAIJ80BX55-50
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80BX55-50 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 55mm 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
- Stroke55 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX55-50
The AirTAC SAIJ80X55-50 is a double-acting, single-rod ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It delivers a robust 2513 N push force at 0.5 MPa, making it suitable for heavy-duty positioning tasks. The extruded aluminum barrel includes sensor grooves on both sides, and this specific configuration uses a SUS304 stainless steel rod for superior corrosion resistance.
Equipped with a 50 mm adjustment range on a 55 mm nominal stroke, this model provides a usable travel window of 5 to 55 mm. This wide tuning band allows operators to dial in the exact end position during commissioning without adding external stops. The PT tapered port threads ensure a tight, reliable pneumatic connection, while the rear adjuster functions strictly as a travel stop rather than a load lock.
Airtac SAIJ80 Adjustable Cylinder SAIJ80BX55-50 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80BX55-50 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 55 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 SAIJ80BX55-50
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×55 | 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 SAIJ80BX55-50 Is Used
Machine Changeover
Quickly reconfigure the physical end-stop distance from 5 to 55 mm when adapting machinery to run a different product size.
Position Calibration
Fine-tune the retraction point during initial commissioning to achieve exact mechanical positioning without machining custom spacers.
Variable End Stops
Provide a hard mechanical stop for heavy assemblies requiring 2513 N of push force, allowing the stroke to be trimmed on the fly.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX55-50 the Right Cylinder?
Choose this 80 mm bore cylinder when an application demands high thrust combined with highly variable end-of-stroke positioning. If the 5 to 55 mm adjustable travel window is excessive, stepping down to a 63 mm bore yields 1559 N of push force at 0.5 MPa. Select the SAIJ adjustable series over a fixed-stroke SAI cylinder when machine setups require frequent product changeovers and precise physical stops. To match this ISO 15552 footprint exactly, specify an 80 mm bore, 55 mm stroke, 50 mm adjustment, PT ports, and SUS304 rod material.
Because the stroke is relatively short, side-loading is less severe than in long-stroke applications, but external guides are still recommended for heavy off-center loads. Remember that the rear adjuster only sets the travel end; it will not hold a load without live air pressure. For true load-holding, consider an external rod lock or a SAIL pneumatic locking cylinder. Mounting options include Basic, FA, LB, TC, FTC, TCM1, and TCM2.
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 SAIJ80BX55-50 FAQ
At an operating pressure of 0.5 MPa, this 80 mm bore cylinder provides a push force of 2513 N and a pull force of 2268 N. At 0.7 MPa, the push force increases to 3518 N.
The rear adjuster acts as a mechanical stop that lets you shorten the 55 mm nominal stroke, providing an adjustable travel window between 5 and 55 mm. It only sets the end position and does not lock the load without continuous air pressure.
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