Airtac SAIJ80 Adjustable Cylinder SAIJ80AX550-50
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80AX550-50 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 SAIJ80AX550-50
The AirTAC SAIJ80X550-50 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to dial back the nominal 550 mm travel by up to 50 mm, creating a precise 500-550 mm usable window. It delivers a robust 4523 N of push force at 0.9 MPa and utilizes a SUS420J2 stainless steel piston rod for enhanced corrosion resistance in humid environments. The extruded aluminum barrel includes sensor grooves on both sides for flexible switch mounting.
Equipped with PT tapered port threads and a 25 mm rod diameter, this 80 mm bore unit handles substantial loads while maintaining a 30-800 mm/s operating speed range. The rear adjustment screw acts purely as a mechanical stop to fine-tune the end position without adding external stops, while the standard air cushions manage end-of-stroke deceleration.
Airtac SAIJ80 Adjustable Cylinder SAIJ80AX550-50 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80AX550-50 |
|---|---|
| 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 SAIJ80AX550-50
| 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 SAIJ80AX550-50 Is Used
Product Changeover Stops
Dial in the 500-550 mm travel window during production line size changes without replacing the cylinder or adding external mechanical stops.
Long-Stroke Diverting
Precisely positions diverter arms on a 550 mm nominal stroke, using the 50 mm rear adjustment to fine-tune the exact resting position.
Machine Setup Tuning
Simplifies initial commissioning of heavy-duty machinery by allowing operators to set the exact end-of-stroke position mechanically at the rear.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX550-50 the Right Cylinder?
Select this 80 mm bore cylinder when your application requires 4523 N of thrust at 0.9 MPa and a flexible 500-550 mm travel range. If you need less force, the 63 mm bore provides 2805 N at 0.9 MPa; stepping up to the 100 mm bore yields 7068 N. The adjustable rear stopper is ideal for machine setups requiring variable end-stops or product changeovers, eliminating the need to physically swap out a fixed-stroke SAI cylinder for minor position tweaks.
Because the 550 mm stroke is relatively long, the 25 mm rod and M20x1.5 rod thread can only support limited side loads, making an external guide mechanism essential to prevent rod binding. Remember that the rear adjuster is a travel stop, not a locking device; this cylinder will not hold a load without live air pressure. For true fail-safe load holding, consider the SAIL or BSAI series. 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 SAIJ80AX550-50 FAQ
This 80 mm bore cylinder provides 2513 N of push force at 0.5 MPa and 4523 N at 0.9 MPa, with a pull force of 2268 N at 0.5 MPa. It operates at speeds between 30 and 800 mm/s.
The rear adjuster screw lets you shorten the effective travel from the nominal 550 mm down to 500 mm. This creates a 500-550 mm usable window for fine-tuning the end position at commissioning, but it functions only as a mechanical stop and does not lock the load without live air pressure.
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