Airtac SAIJ80 Adjustable Cylinder SAIJ80AX550-20
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80AX550-20 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 SAIJ80AX550-20
The AirTAC SAIJ80X550-20 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, enabling you to dial back the retract end-position by up to 20 mm. This yields a usable travel window of 530-550 mm, ideal for fine-tuning machine setup without adding external stops. It delivers 2513 N of pull force at 0.5 MPa and 4523 N of push force at 0.9 MPa.
This specific SKU features a SUS420J2 stainless steel rod (option A) for enhanced corrosion resistance compared to standard carbon steel. The extruded aluminum barrel includes sensor grooves on both sides for direct mounting of CMSE reed or DMSE electronic switches. The rear adjuster functions strictly as a travel stop to set deceleration, not as a load-holding lock.
Airtac SAIJ80 Adjustable Cylinder SAIJ80AX550-20 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80AX550-20 |
|---|---|
| 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 SAIJ80AX550-20
| 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 SAIJ80AX550-20 Is Used
Changeover Calibration
Dial in the 530-550 mm retract position during product size changes without machining new hard stops.
Variable End Stops
Set precise retraction limits for diverter gates that handle varying package lengths on the fly.
Machine Setup
Fine-tune the end-of-stroke deceleration point at commissioning to prevent hard mechanical impacts.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX550-20 the Right Cylinder?
Choose this 80 mm bore when 50 mm (982 N pull at 0.5 MPa) is too weak or 100 mm (3681 N pull) is oversized. The -20 adjustment code is selected when a commissioning process requires exact end-position tuning during product changeovers, avoiding the need to physically swap out a fixed-stroke SAI cylinder. To match an ISO 15552 replacement, specify the 80 mm bore, 550 mm stroke, 20 mm adjustment, PT tapered port, and the SUS420J2 rod material.
Because the 550 mm stroke is long, the 25 mm rod and M20x1.5 thread still require an external guide to handle potential side loads. If your process needs to hold a load vertically without live air pressure, this cylinder cannot do it; you must use a SAIL air-released lock, a BSAI clamp-lock, or an external rod lock.
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 SAIJ80AX550-20 FAQ
At 0.5 MPa it provides 2513 N push and 2268 N pull force. At 0.9 MPa, the push force increases to 4523 N.
The rear adjuster acts as a stopper that lets you shorten the 550 mm nominal stroke by up to 20 mm, creating a 530-550 mm usable travel window for fine-tuning during setup.
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