Airtac SAIJ80 Adjustable Cylinder SAIJ80AX55-50
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80AX55-50 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 55mm 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
- Stroke55 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX55-50
The AirTAC SAIJ80X55-50 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, letting you dial back the nominal 55 mm stroke by up to 50 mm. This yields a highly versatile 5-55 mm usable travel window, perfect for fine-tuning end positions at commissioning without swapping hardware. It delivers a robust 2513 N push force at 0.5 MPa, matching the standard SAI thrust class.
This variant features a SUS420J2 stainless steel rod for superior corrosion resistance and uses PT tapered port threads. The extruded aluminum barrel includes sensor grooves on both sides for CMSE reed or DMSE electronic switches. The rear adjuster acts purely as a mechanical stop to set deceleration endpoints, not as a load-holding lock.
Airtac SAIJ80 Adjustable Cylinder SAIJ80AX55-50 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80AX55-50 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 55 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 SAIJ80AX55-50
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×55 | 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 SAIJ80AX55-50 Is Used
Product Changeovers
Dial in the 5-55 mm travel window rapidly during format size changes on packaging lines without changing the cylinder.
Commissioning Tuning
Fine-tune the exact retract end-position during machine setup to avoid crushing parts, using the 50 mm rear adjustment screw.
Variable End Stops
Set precise deceleration points for operations requiring multiple stroke lengths from a single 80 mm bore actuator.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX55-50 the Right Cylinder?
Choose this 80 mm bore when your application requires the 2513 N push force at 0.5 MPa (or 3518 N at 0.7 MPa) alongside highly variable end-stops. If you need less force, stepping down to a 63 mm bore yields 1559 N. The 50 mm adjustment range is ideal for product-size changeovers on a line, allowing rapid reconfiguration without bolting on external stops. For fixed-travel needs without the adjuster, the standard SAI series is sufficient.
To replace an ISO 15552 cylinder, match the 80 mm bore, 55 mm nominal stroke, 50 mm adjustment, PT G3/8 port, and the desired mounting from the SAIJ set (Basic, FA, LB, TC, FTC, TCM1, TCM2). Because the 25 mm rod and M20x1.5 thread handle side loads well, but even short strokes can induce leverage, always guide the load externally. To hold a load securely without live air, use a SAIL or BSAI lock cylinder instead of relying on the adjuster.
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 SAIJ80AX55-50 FAQ
At 0.5 MPa operating pressure, the 80 mm bore 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 screw lets you shorten the effective travel from the 55 mm nominal stroke down to as little as 5 mm, creating a 5-55 mm usable window. It functions as a mechanical stop to set the end position and does not hold the load without live air pressure.
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