Airtac SAIJ80 Adjustable Cylinder SAIJ80BX800-50S
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80BX800-50S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 800mm 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
- Stroke800 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX800-50S
The AirTAC SAIJ80X800-50-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, providing a usable travel window of 750-800 mm from its 800 mm nominal stroke. Delivering a robust 4523N push force at 0.9 MPa, it features a SUS304 stainless steel rod for superior corrosion resistance and a PT tapered port thread. The integrated -S magnet enables precise position detection using AirTAC CMSE reed or DMSE electronic solid-state sensors.
Unlike fixed-stroke alternatives, this model allows you to fine-tune the retract end-position at commissioning without swapping the cylinder or adding external stops. The rear adjuster acts purely as a travel stop to set the deceleration point alongside the variable air cushions, meaning it will not hold a load without live air pressure. For load-holding requirements without continuous pressure, consider the SAIL or BSAI series.
Airtac SAIJ80 Adjustable Cylinder SAIJ80BX800-50S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80BX800-50S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 800 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 SAIJ80BX800-50S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×800 | 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 SAIJ80BX800-50S Is Used
Variable End-Stop Tuning
Dial in the exact 750 to 800mm retract position during commissioning to accommodate changing product lengths without installing external physical stops.
Machine Changeover Setup
Quickly reconfigure the cylinder's effective travel window on automated lines when switching between different product sizes or packaging formats.
Long-Stroke Assembly Press
Leverage the 4523N force at 0.9MPa and SUS304 rod for robust pressing applications, using the rear adjuster to fine-tune the final pressing depth.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX800-50S the Right Cylinder?
When selecting this 80mm bore cylinder, which yields 3518N push force at 0.7 MPa, stepping down to a 63mm bore reduces the output to 2182N, while moving up to a 100mm bore increases it to 5497N. The adjustable stroke is ideal for machine setups requiring variable end-stops or product-size changeovers. Because the 800mm stroke is substantial and the 25mm rod with M20x1.5 thread handles high side loads, you must use an external guide to prevent rod binding over long unsupported travel.
As a direct ISO 15552 interchangeable replacement, match the 80mm bore, 800mm stroke, 50mm adjustment, PT port, and -S magnet. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2 options, intentionally omitting FB, CA, CB, and CR brackets. Operating speed ranges from 30-800 mm/s.
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 SAIJ80BX800-50S FAQ
At 0.9 MPa operating pressure, this 80mm bore cylinder provides a push force of 4523N and a pull force of 2268N. It reaches a maximum push force of 513 kgf at 1.0 MPa.
The rear adjusting screw acts as a mechanical stop that trims the effective stroke back by up to 50mm, creating a 750-800mm usable travel window. It sets the end-position and works with the air cushion to decelerate the load, but it does not lock or hold the load without live air pressure.
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