Airtac SAUJ80 Adjustable Stroke Cylinder SAUJ80X900-50S
The AirTAC Airtac SAUJ80 Adjustable Stroke Cylinder SAUJ80X900-50S is a genuine double-acting profile-type standard air cylinder with a Ø80mm bore and 900mm stroke, 3/8" air ports and adjustable end cushioning. Its hard-anodized aluminum-profile barrel is shorter than an ISO 15552 cylinder of the same bore, and it shares SC-series mounting accessories.
- BoreØ80 mm
- Stroke900 mm
- Port size3/8"
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 28 mm
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About the Airtac SAUJ80 Adjustable Stroke Cylinder SAUJ80X900-50S
The AirTAC SAUJ80X900-50S is a double-acting, single-rod profile cylinder with an on-site stroke adjustment window. You can shorten the 900 mm extend travel by up to 50 mm using the external stop screw, yielding a usable range of 850-900 mm. The 3/8" port and M20x1.5 rod end feed a robust 80 mm bore that outputs 2513 N push and 2268 N pull at 0.5 MPa. It features a 28 mm adjustable air cushion at each end.
This extruded aluminum profile barrel is notably shorter than an ISO 15552 cylinder of the same bore. The -S suffix means a piston magnet is installed for CMSG, DMSG, or EMSG sensors. For sizing, a safe working load is roughly 1508 N (60% of the 0.5 MPa push force), and it can vertically lift about 128 kg with a 2:1 safety margin. Note that the external stop sets the end position; it is not a load lock.
Airtac SAUJ80 Adjustable Stroke Cylinder SAUJ80X900-50S Technical Specifications
| Model | Airtac SAUJ80 Adjustable Stroke Cylinder SAUJ80X900-50S |
|---|---|
| Series | SAU profile-type cylinder |
| Bore size | Ø80 mm |
| Stroke | 900 mm |
| Acting type | Double acting |
| Port size | 3/8" |
| 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, 28 mm |
| Max stroke | Up to 1500 mm |
Specifications follow the official AirTAC SAU series datasheet. Confirm against the product label before installation. Thread options: PT (blank) / G (BSPP). A high-temperature seal (0-150 °C) is available.
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 SAUJ80 Adjustable Stroke Cylinder SAUJ80X900-50S
| SAU | Profile-type standard cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×900 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Related SAU-family variants: SAUD (double rod), SAUJ (adjustable stroke), SAUF (with built-in solenoid valve), and SAU-S with built-in magnet. Seals: TPU (blank) / Viton H / NBR N. Sensor switches: CMSG / DMSG / EMSG.
Where the Airtac SAUJ80 Adjustable Stroke Cylinder SAUJ80X900-50S Is Used
Long-Reach Press Dwell
Dials in the exact bottoming position of a forming press over an 850-900 mm travel window without remachining the stop block.
Variable Length Divert
Trims the extend stroke on-site to push varying carton widths off a high-speed line using a single actuator setup.
Pallet Stop Calibration
Adjusts the stopping fence for mixed pallet depths on a 900 mm conveyor section, fine-tuning the 50 mm window during commissioning.
Is the Airtac SAUJ80 Adjustable Stroke Cylinder SAUJ80X900-50S the Right Cylinder?
When sizing this actuator, look both ways: dropping to a 63 mm bore reduces the 0.5 MPa push to 1559 N, while stepping up to a 100 mm bore increases it to 3927 N. Choose the SAUJ over a fixed SAU when your machine assembly requires field tuning of the extend endpoint rather than machining a separate external hard stop. Mounting options include Basic, FA flange, and LB foot styles, sharing compatibility only with the AirTAC SC series. The -S option equips the cylinder for reed or electronic sensors. Because the stroke is 900 mm, you must support the load with external guides to prevent rod bending and manage side loads.
Quick checklist
- ✓ Required force at your working pressure
- ✓ Stroke and mounting space
- ✓ Port/thread type (PT/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 — same as SC).
- check Installation by qualified personnel per AirTAC docs.
Airtac SAUJ80 Adjustable Stroke Cylinder SAUJ80X900-50S FAQ
At 0.5 MPa it provides 2513 N push and 2268 N pull. Push force rises to 3518 N at 0.7 MPa, 4523 N at 0.9 MPa, and a theoretical max of 513 kgf at 1.0 MPa. The 900 mm extend stroke can be shortened by up to 50 mm via the external stop screw, giving a usable range of 850-900 mm. The 3/8" port feeds the 80 mm bore, which operates at 30-800 mm/s.
No. The external stop screw only sets the extend end position; it is not a load lock. If air is lost or the valve is centered, the piston drifts and the 28 mm air cushion merely decelerates the stroke near the end. For fail-safe load holding, you must add an external rod lock or a pilot-operated check valve.
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