Airtac SAIJ80 Adjustable Cylinder SAIJ80AX450-20
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80AX450-20 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 450mm 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
- Stroke450 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX450-20
The AirTAC SAIJ80X450-20 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, delivering a robust 4523N of push force at 0.9 MPa. By turning the external stopper at the rear, you can fine-tune the effective travel within a precise 430 to 450 mm window. This eliminates the need to physically swap out the cylinder or bolt on external stops when dialing in final end positions during commissioning.
Built with a SUS420J2 stainless steel rod and PT tapered ports, this 80 mm bore unit is designed for demanding industrial environments. The extruded aluminum barrel features sensor grooves on both sides, ready to accept CMSE reed or DMSE electronic solid-state switches if a magnet is later required. The rear adjuster acts strictly as a travel stop and works in tandem with the built-in air cushions to decelerate the load; it does not hold the load without live air pressure.
Airtac SAIJ80 Adjustable Cylinder SAIJ80AX450-20 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80AX450-20 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 450 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 SAIJ80AX450-20
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×450 | 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 SAIJ80AX450-20 Is Used
Machine Setup Tuning
Dial in the exact 430-450 mm end position during machine commissioning without machining new spacer blocks or changing the cylinder.
Product Changeover
Quickly adjust the retract stop to accommodate varying package sizes on a packaging line, keeping downtime to a minimum.
Long-Travel Assembly
Use the 450 mm stroke for extended linear movement in automated assembly presses, relying on the air cushions and stopper for smooth deceleration.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX450-20 the Right Cylinder?
Choose this adjustable-stroke model when a fixed 450 mm SAI cylinder cannot accommodate minor mechanical variances or product changeovers on the line. If your application requires less force, stepping down to a 63 mm bore yields 2805N of push force at 0.9 MPa, while moving up to a 100 mm bore provides 7068N for heavier loads. Because the 450 mm stroke is substantial, the 25 mm rod diameter provides excellent rigidity, though an external guide is still recommended to prevent side-loading damage over long unsupported travels.
To replace an ISO 15552 cylinder, match the 80 mm bore, 450 mm stroke, 20 mm adjustment range, PT port threads, and the reduced SAIJ mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2). Note that this plain SAIJ variant does not hold its position without live air; for fail-safe load holding, consider an SAIL or BSAI series cylinder instead.
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 SAIJ80AX450-20 FAQ
At an operating pressure of 0.9 MPa, this 80 mm bore cylinder generates a push force of 4523N and a pull force of 4082N. The maximum allowable force at 1.0 MPa is 513 kgf.
The rear adjuster screw allows you to mechanically shorten the nominal 450 mm stroke by up to 20 mm, providing a usable travel window of 430 to 450 mm. The adjuster serves as a mechanical stop to set the end position and does not lock the load without continuous air pressure.
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