Airtac SAIJ80 Adjustable Cylinder SAIJ80BX650-50
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80BX650-50 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 650mm 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
- Stroke650 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX650-50
The AirTAC SAIJ80X650-50 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster, providing a usable travel window between 600 and 650 mm. Equipped with a 25 mm SUS304 stainless steel rod and PT tapered port threads, it generates 2513 N of push thrust at 0.5 MPa. The extruded aluminum barrel includes sensor grooves on both sides for flexible switch placement.
This model utilizes a 36 mm air cushion at both ends to decelerate the payload smoothly. The rear mechanical stopper allows precise end-position tuning during commissioning without adding external stops, but it does not function as a load-holding lock. For position retention without live air pressure, an external rod lock or related SAIL series cylinder is required.
Airtac SAIJ80 Adjustable Cylinder SAIJ80BX650-50 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80BX650-50 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 650 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 SAIJ80BX650-50
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×650 | 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 SAIJ80BX650-50 Is Used
Variable Stroke Machining
Dial in the exact clamping travel between 600 and 650 mm during machine setup to accommodate different part sizes without swapping cylinders.
Product Changeover Stops
Adjust the rear stopper on the fly to reposition end-stops for varying package lengths on a packaging line.
End-Position Tuning
Fine-tune the retract end-position at commissioning to perfect timing without adding bulky external mechanical stops.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX650-50 the Right Cylinder?
Choose this 80 mm bore when an application requires 2513 N of push force at 0.5 MPa, or step down to the 63 mm bore if 1559 N is sufficient. The 50 mm adjustment range is ideal for product changeovers, allowing you to dial back the 650 mm nominal stroke to a precise 600 mm minimum. Unlike a fixed-stroke SAI cylinder, this design provides variable end-stops without hardware swaps.
Because the nominal stroke is 650 mm, the 25 mm rod and M20x1.5 thread carry a high side-load risk; an external guide rail is recommended to prevent rod deflection. Mounting options include the reduced SAIJ set of Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR brackets. It is dimensionally interchangeable per ISO 15552.
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 SAIJ80BX650-50 FAQ
At 0.5 MPa operating pressure, this 80 mm bore cylinder provides 2513 N of push thrust and 2268 N of pull thrust. At 0.7 MPa, the push force increases to 3518 N.
The rear adjuster acts as a mechanical stop that trims the effective stroke. For this 650 mm nominal stroke cylinder, you can reduce the travel by up to 50 mm, creating a usable 600 to 650 mm window. It is a travel stop, not a lock, and requires live air to hold the load.
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