Airtac SAIJ80 Adjustable Cylinder SAIJ80AX500-50
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80AX500-50 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 500mm 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
- Stroke500 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX500-50
The AirTAC SAIJ80X500-50 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that creates a 450-500mm usable travel window. Delivering 4523N of push force at 0.9 MPa, it handles heavy-duty positioning with precision. The extruded aluminum barrel includes sensor grooves on both sides for flexible switch placement.
This variant uses an SUS420J2 stainless steel rod (material code A) for enhanced corrosion resistance and features PT tapered port threads (G3/8). The rear stopper screw allows you to fine-tune the retract position at commissioning without adding external stops. Note that the adjuster acts only as a travel stop, not a load-holding lock.
Airtac SAIJ80 Adjustable Cylinder SAIJ80AX500-50 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80AX500-50 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 500 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 SAIJ80AX500-50
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×500 | 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 SAIJ80AX500-50 Is Used
Product Changeover
Dial in the 450-500mm travel window during format changeovers on a packaging line, using the rear adjuster to hit new end positions without swapping cylinders.
Machine Setup
Fine-tune the retract stop during commissioning to perfectly seat heavy 4523N loads, eliminating the need to bolt on physical spacers.
Variable End Stops
Adjust the effective stroke on the fly for automated assembly equipment that processes multiple part sizes requiring different retraction depths.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX500-50 the Right Cylinder?
Choose this 80mm bore when you need substantial thrust—such as the 3518N push force at 0.7 MPa—that a 63mm bore (2182N at 0.7 MPa) cannot provide, while avoiding the larger footprint of a 100mm cylinder. The 50mm adjustment range is ideal for dialing in exact end positions during machine setup or product changeovers, replacing the need for fixed-stroke SAI cylinders when exact travel lengths are uncertain.
Because the 500mm stroke is substantial, the 25mm rod diameter should still be paired with an external guide to prevent excessive side-loading on the piston. For applications requiring the load to be held without live air pressure, the SAIJ adjuster will not suffice; consider an external rod lock or AirTAC SAIL and BSAI locking cylinders instead. Mounting options include 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 SAIJ80AX500-50 FAQ
At 0.5 MPa it provides 2513N push and 2268N pull force. At 0.9 MPa, the push force increases to 4523N.
The rear adjuster acts as a mechanical stop, allowing you to shorten the nominal 500mm stroke by up to 50mm, creating a 450-500mm usable travel window. It sets the end position but does not lock the load without air pressure.
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