Airtac SAIJ80 Adjustable Cylinder SAIJ80BX800-20S
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80BX800-20S 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 SAIJ80BX800-20S
The AirTAC SAIJ80X800-20-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that lets you dial back the travel by up to 20 mm, creating a precise 780-800 mm usable window for fine end-position tuning. Delivering a robust 3518 N of push force at 0.7 MPa, it handles heavy-duty positioning with ease. The barrel is extruded aluminum with sensor grooves on both sides, and this specific configuration includes a SUS304 stainless steel rod for superior corrosion resistance.
This model is equipped with a magnetic piston (-S) for direct compatibility with AirTAC CMSE reed and DMSE electronic sensors. It uses a PT tapered port thread and relies on adjustable air cushions at both ends to decelerate the moving load. Remember that the rear adjuster acts purely as a travel stop—it does not hold the load without live air pressure. For dead-load holding, you would need an external rod lock or a related SAIL pneumatic-lock cylinder.
Airtac SAIJ80 Adjustable Cylinder SAIJ80BX800-20S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80BX800-20S |
|---|---|
| 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 SAIJ80BX800-20S
| 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 SAIJ80BX800-20S Is Used
Product Changeover Lines
Dial in the 780-800 mm travel window on the fly to accommodate varying package lengths without physically replacing the cylinder or bolting on external stops.
Long-Stroke Assembly Presses
Leverage the 3518 N push force at 0.7 MPa to seat components over a long travel distance, using the rear stop to fine-tune the final pressing position.
Automated Machine Setup
Use the 20 mm adjustment screw to perfectly set the retract end-position during commissioning, absorbing mechanical tolerances without reprogramming the PLC.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX800-20S the Right Cylinder?
Choose this 80 mm bore when you need more thrust than a 63 mm cylinder offers (2182 N push at 0.5 MPa) but want to avoid the bulk of a 100 mm unit. The adjustable stroke is ideal for machine setups requiring variable end stops or product-size changeovers without swapping cylinders or adding external mechanical stops. Because the nominal stroke is 800 mm, the 25 mm rod and M20x1.5 thread provide structural rigidity, but you must use an external guide to prevent side-load binding over this long unsupported travel.
As an ISO 15552 profile cylinder, it is dimensionally interchangeable with other ISO 15552 cylinders. To match this exact configuration, specify an 80 mm bore, 800 mm stroke, 20 mm adjustment range, PT G3/8 port, and a -S magnet. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2 options, omitting the FB, CA, CB, and CR styles found on some other series.
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 SAIJ80BX800-20S FAQ
At 0.7 MPa operating pressure, this 80 mm bore cylinder generates 3518 N of push force and 3518 N of pull force. It can deliver up to 4523 N of push force at 0.9 MPa.
The rear adjuster screw lets you shorten the effective stroke by up to 20 mm, providing a usable travel window of 780 to 800 mm. It acts as a mechanical stop to fine-tune the end position and does not lock the load without live air pressure.
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