Airtac SAIJ80 Adjustable Cylinder SAIJ80BX550-20S
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80BX550-20S 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 SAIJ80BX550-20S
The AirTAC SAIJ80X550-20-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers a robust 4523N of push force at 0.9 MPa and features a 530 to 550mm usable travel window, allowing you to trim the nominal 550mm stroke by up to 20mm during commissioning without swapping the cylinder. An integrated magnet enables position sensing with CMSE reed or DMSE electronic switches.
This variant utilizes a SUS304 stainless steel rod for superior corrosion resistance and carries PT tapered port threads. The extruded aluminum barrel includes sensor grooves on both sides for flexible switch mounting. The rear adjuster acts purely as a mechanical stop to fine-tune the end position and does not hold the load without live air pressure.
Airtac SAIJ80 Adjustable Cylinder SAIJ80BX550-20S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80BX550-20S |
|---|---|
| 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 SAIJ80BX550-20S
| 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 SAIJ80BX550-20S Is Used
Machine Changeover
Quickly adjust the 530-550mm stroke end-position when switching a packaging line to accommodate different product sizes without changing hardware.
End-Stop Calibration
Fine-tune the final retract position during machine commissioning to perfectly align heavy 80mm bore loads without adding external mechanical stops.
Variable Diverter
Actuate a diverter arm on a conveyor system where the exact stopping point of the product needs occasional micro-adjustments via the rear screw.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX550-20S the Right Cylinder?
Choose this 80mm bore cylinder when an application requires substantial thrust, such as the 3518N push force at 0.7 MPa, but demands precise end-position tuning for product changeovers. If your setup needs less force, stepping down to a 63mm bore yields 2805N at 0.9 MPa. Conversely, heavier loads might require a 100mm bore providing 7068N. The adjustable 530-550mm travel window is ideal for dialing in exact positions on the fly, unlike a fixed-stroke SAI cylinder.
Because the 550mm stroke is relatively long, the 25mm diameter SUS304 rod will still require an external guide to prevent excessive side-loading and premature seal wear. For load-holding without continuous air pressure, this cylinder is insufficient; the rear stop is not a lock, so you should look to an SAIL air-released lock or BSAI clamp-lock cylinder instead. This SAIJ model supports Basic, FA, LB, TC, FTC, TCM1, and TCM2 mounts, omitting FB, CA, CB, and CR options.
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 SAIJ80BX550-20S FAQ
At 0.5 MPa it provides 2513N push and 2268N pull force. At the maximum operating pressure of 0.9 MPa, it generates 4523N of push force.
The rear adjuster screw allows you to shorten the effective travel from the nominal 550mm down to 530mm. It acts as a mechanical stop for end-position tuning and does not lock the load without live air.
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