Airtac SAIJ80 Adjustable Cylinder SAIJ80BX550-50S
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80BX550-50S 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 SAIJ80BX550-50S
The AirTAC SAIJ80X550-50-S is a double-acting ISO 15552 profile cylinder featuring a rear mechanical adjuster that allows you to fine-tune the effective stroke length. With a 550 mm nominal stroke and a 50 mm adjustment range, you can dial the travel window down to 500 mm during commissioning without adding external stops. It delivers robust thrust, offering 2513 N of push force at 0.5 MPa and up to 4523 N at 0.9 MPa.
This variant uses a SUS304 stainless steel rod for corrosion resistance and includes a magnet for position sensing. The extruded aluminum barrel integrates sensor grooves on both sides, supporting AirTAC CMSE reed and DMSE electronic switches. The G3/8 PT tapered ports manage pneumatic flow, while the 25 mm rod and M20x1.5 thread provide high structural rigidity for demanding setups.
Airtac SAIJ80 Adjustable Cylinder SAIJ80BX550-50S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80BX550-50S |
|---|---|
| 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 SAIJ80BX550-50S
| 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 SAIJ80BX550-50S Is Used
Variable End-Stop Positioning
Dial in the exact retract distance between 500 and 550 mm to accommodate varying material thicknesses without changing the cylinder.
Product Changeover
Quickly adjust the stroke end-position during packaging line format changes, saving downtime compared to physically swapping cylinders.
Heavy Clamping Force
Leverage the 4523 N push force at 0.9 MPa to securely hold and form heavy metal or composite parts during machining.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX550-50S the Right Cylinder?
Choose this 80 mm bore when an application requires heavy thrust (up to 4523 N at 0.9 MPa) that exceeds the 50 mm bore's 1767 N capacity, but falls short of the 100 mm bore's 7068 N output. The adjustable 500-550 mm travel window is ideal for product changeovers, allowing you to reposition the retract end-stop on the fly rather than physically swapping the cylinder for a different fixed-stroke SAI unit.
Because the 550 mm stroke is substantial, the unsupported piston rod is prone to deflection under gravity or side loads; always use an external guide to prevent premature seal wear. Remember that the rear adjuster acts only as a travel stop and the air cushions handle deceleration—neither will hold a load without live air pressure. For true load-holding without continuous air, integrate an external rod lock or pilot-operated check valve, or select an AirTAC 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 SAIJ80BX550-50S FAQ
At 0.5 MPa, it provides 2513 N of push force and 2268 N of pull force. At the maximum operating pressure of 0.9 MPa, the push force increases to 4523 N.
A rear adjusting screw allows you to shorten the 550 mm nominal stroke by up to 50 mm, creating a usable travel window of 500-550 mm. This stopper fine-tunes the end position but does not lock the load without live air pressure.
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