Airtac SAIJ80 Adjustable Cylinder SAIJ80AX550-40
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80AX550-40 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 SAIJ80AX550-40
The AirTAC SAIJ80X550-40 is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers a robust 2513 N push force at 0.5 MPa, utilizing a 25 mm piston rod and G3/8 ports. By integrating an external stopper at the rear, this model allows you to trim the effective travel back by up to 40 mm, creating a precise 510 to 550 mm usable stroke window without swapping out the entire unit.
This profile cylinder features a SUS420J2 stainless steel rod (material code A) for enhanced corrosion resistance and uses PT tapered port threads. The extruded aluminum barrel includes sensor grooves on both sides for flexible mounting of CMSE or DMSE switches, though this specific SKU is configured without a magnet. The rear adjuster acts purely as a travel stop to fine-tune the end position during commissioning; it does not lock or hold the load without continuous live air pressure.
Airtac SAIJ80 Adjustable Cylinder SAIJ80AX550-40 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80AX550-40 |
|---|---|
| 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 SAIJ80AX550-40
| 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 SAIJ80AX550-40 Is Used
Product Changeovers
Dial in the 510-550 mm travel window during format changes on packaging lines, avoiding the need to physically swap out cylinders for different product sizes.
End-Position Tuning
Fine-tune the retract end-position at machine commissioning to achieve exact mechanical alignment without adding external stopper blocks to the fixture.
Heavy Material Handling
Leverage the 2513 N push force at 0.5 MPa to move heavy pallets or workpieces, relying on the external stopper to trim the stroke for precise placement.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX550-40 the Right Cylinder?
Selecting this 80 mm bore cylinder makes sense when your application requires substantial force—such as the 2513 N push thrust at 0.5 MPa—combined with variable end-stop positioning. If your setup needs less force, stepping down to a 63 mm bore provides 1559 N, while moving up to a 100 mm bore yields 3927 N. The adjustable stroke is ideal for product changeovers on a line, allowing you to dial in the 510-550 mm travel window on the fly instead of machining external stops or buying a fixed-length SAI cylinder.
Because the nominal stroke is 550 mm, the extended 25 mm rod will experience leverage forces during operation, so an external guide is recommended to prevent excessive side-loading. To replace an ISO 15552 cylinder, match the 80 mm bore, 550 mm stroke, 40 mm adjustment, PT port threads, and the SUS420J2 rod material. Remember that the rear adjuster only sets the travel limit; for load-holding without live pressure, you must use an external rod lock, a pilot-operated check valve, or switch to an AirTAC SAIL or BSAI locking cylinder.
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 SAIJ80AX550-40 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 screw acts as a mechanical stop, allowing you to shorten the 550 mm nominal stroke by up to 40 mm. This creates a usable travel window of 510 to 550 mm for fine-tuning end positions. It functions only as a stop and does not hold the load without live air pressure.
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