Airtac SAIJ80 Adjustable Cylinder SAIJ80AX550-20S
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80AX550-20S 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 SAIJ80AX550-20S
The AirTAC SAIJ80X550-20-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to fine-tune the travel window between 530 and 550 mm during commissioning. It delivers 2513 N of push force and 2268 N of pull force at 0.5 MPa, making it well-suited for moving heavy loads with precise end-position control.
This variant includes a magnet for CMSE reed and DMSE electronic sensors, and uses an SUS420J2 stainless steel rod for enhanced corrosion resistance. The extruded aluminum barrel includes sensor grooves on both sides, and the rear adjuster functions strictly as a travel stop to dial in the exact end position without adding external stops.
Airtac SAIJ80 Adjustable Cylinder SAIJ80AX550-20S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80AX550-20S |
|---|---|
| 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 SAIJ80AX550-20S
| 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 SAIJ80AX550-20S Is Used
Machine Changeover
Dial in the 530-550 mm travel window during product size changes to set new end positions quickly without swapping cylinders.
Long-Stroke Diverting
Handles heavy conveyor diverting tasks using 2513 N of thrust while allowing precise end-stop tuning at commissioning.
Assembly Press Setup
Fine-tune the pressing depth on the factory floor by turning the rear adjuster rather than adding mechanical external stops.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX550-20S the Right Cylinder?
Choose this 80 mm bore when a 63 mm cylinder (1559 N push at 0.5 MPa) lacks the thrust for your fixture, but a 100 mm bore (3927 N) would be excessive. The 20 mm adjustment range is ideal for product changeovers where the exact end-of-stroke must be dialed in on the machine without replacing the cylinder. Because the nominal stroke is 550 mm, an external guide is recommended to prevent excessive side loading on the long unsupported piston rod.
For ISO 15552 replacement matching, use bore 80, stroke 550, adjustment 20, PT tapered port, and the -S magnet. Note that the rear adjuster and air cushions only decelerate the load; they do not hold position without live air. For fail-safe load holding, consider the SAIL or BSAI series instead. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2.
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 SAIJ80AX550-20S FAQ
At 0.5 MPa operating pressure, this 80 mm bore cylinder provides 2513 N of push force and 2268 N of pull force. At 0.7 MPa, the push force increases to 3518 N.
The rear adjuster acts as a mechanical stop that lets you shorten the effective travel from the 550 mm nominal stroke down to 530 mm. This allows for fine-tuning the end position during setup without needing to replace the cylinder.
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