Airtac SAIJ80 Adjustable Cylinder SAIJ80BX550-40S
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80BX550-40S 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 SAIJ80BX550-40S
The AirTAC SAIJ80X550-40-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, allowing you to dial back the nominal 550 mm travel by up to 40 mm for a precise 510-550 mm usable window. It delivers a robust 3518 N push force at 0.7 MPa and features a SUS304 stainless steel rod for superior corrosion resistance in harsh environments. The extruded aluminum barrel includes sensor grooves on both sides, and because this is an -S model, it carries a magnet ready for AirTAC CMSE reed and DMSE solid-state switches.
This adjustable-stroke design eliminates the need to swap cylinders or bolt on external stops when fine-tuning end positions at commissioning or during product changeover. The rear adjuster acts purely as a travel stop and works alongside the variable air cushions at both ends to decelerate the load. It is not a locking mechanism, so if your application requires load-holding without live air pressure, consider an AirTAC SAIL or BSAI series instead.
Airtac SAIJ80 Adjustable Cylinder SAIJ80BX550-40S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80BX550-40S |
|---|---|
| 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 SAIJ80BX550-40S
| 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 SAIJ80BX550-40S Is Used
Machine Changeover
Quickly fine-tune the 510-550 mm end-stop during product size changes on a packaging line without swapping out the entire cylinder.
End-Position Tuning
Dial in the exact retracted position during machine commissioning to perfect timing and mechanical alignment without external stoppers.
Corrosive Assembly Lines
Leverage the SUS304 rod and 2513 N pull force at 0.5 MPa for pushing and pulling heavy jigs in wash-down or chemical-heavy manufacturing settings.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX550-40S the Right Cylinder?
Choose this 80 mm bore cylinder when you need higher force than a 63 mm bore (which provides 2182 N push at 0.7 MPa) but want to avoid the bulk of a 100 mm bore (5497 N push). The PT tapered port (G3/8) and M20x1.5 rod thread provide ample flow and structural strength for heavy loads. Because the 550 mm stroke is long, the M20 rod diameter provides rigidity, but an external guide is recommended to prevent side-load damage over long unsupported travels. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2 options, omitting FB, CA, CB, and CR.
For a drop-in ISO 15552 replacement, match the 80 mm bore, 550 mm stroke, 40 mm adjustment, PT G3/8 port, and the -S magnet. The SUS304 (code B) rod material is specifically selected here for environments where carbon steel or SUS420J2 might corrode. Operating speed ranges from 30-800 mm/s, making it versatile for general automation.
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 SAIJ80BX550-40S FAQ
At 0.7 MPa operating pressure, this 80 mm bore cylinder generates 3518 N of push force and 2268 N of pull force. It can deliver a maximum push force of 4523 N at 0.9 MPa.
The rear adjuster screw allows you to shorten the effective travel from the nominal 550 mm down to 510 mm, giving a 40 mm fine-tuning window. This stopper only sets the travel end and does not lock the load without live air pressure.
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