Airtac SAIJ80 Adjustable Cylinder SAIJ80BX400-50
The AirTAC SAIJ80 Adjustable Cylinder SAIJ80BX400-50 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 400mm stroke, G3/8 air ports and adjustable end cushioning. Its standardized mounting interface makes it interchangeable with other ISO 15552 cylinders at the mounting interface.
- BoreØ80 mm
- Stroke400 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX400-50
The AirTAC SAIJ80X400-50 is a double-acting, double-rod ISO 15552 profile cylinder engineered for applications requiring precise end-position tuning. A rear-mounted adjusting screw allows you to shorten the effective stroke by up to 50 mm, creating a 350-400 mm usable travel window without adding external stops. Delivering 2268 N of pull force at 0.5 MPa, this actuator handles substantial loads during machine changeovers.
This variant features a SUS304 stainless steel rod for superior corrosion resistance and uses a PT tapered port thread. The extruded aluminum barrel includes sensor grooves on both sides, though this specific SKU is built without a magnet for position detection. The rear adjuster functions purely as a travel stop to fine-tune deceleration, meaning it will not hold a load without live air pressure.
Airtac SAIJ80 Adjustable Cylinder SAIJ80BX400-50 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80BX400-50 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 400 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 | 2268 N | 2268 N |
| 0.7 MPa | 3175 N | — |
| Max (@1.0 MPa) | 463 kgf | |
Double-rod model: the rod passes through the rear cover, so both piston faces lose rod area and push is shown at the annular-area value. Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ80 Adjustable Cylinder SAIJ80BX400-50
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×400 | 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 SAIJ80BX400-50 Is Used
Variable End-Stop Tuning
Fine-tune the 350-400 mm travel window during commissioning to dial in exact retract positions without swapping out the entire cylinder.
Product-Size Changeovers
Adapt automated lines to different product lengths on the fly by adjusting the rear stopper screw up to 50 mm, minimizing downtime.
Long-Stroke Material Handling
Drive heavy material transfer carts using the 2268 N pull force, relying on the SUS304 rod for durability in demanding environments.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX400-50 the Right Cylinder?
Select this 80 mm bore actuator when a fixed-stroke SAI cylinder cannot accommodate product size variations on a line, as the 50 mm adjustment window lets you dial in the exact end-stop at commissioning. If your process requires less force, stepping down to a 63 mm bore yields 1402 N of pull force at 0.5 MPa; conversely, moving up to a 100 mm bore provides 3681 N. Because this cylinder uses a PT tapered port thread and lacks a magnet, ensure your pneumatic fittings and sensor strategies match these exact attributes.
When replacing an ISO 15552 cylinder, verify the 80 mm bore, 400 mm nominal stroke, 50 mm adjustment range, PT port, and the reduced SAIJ mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2, omitting FB, CA, CB, and CR). The 400 mm stroke on a 25 mm rod demands an external guide to prevent excessive side-loading and premature seal wear. For load-holding without live pressure, consider an external rod lock or pilot-operated check valve, as the adjuster here is strictly a stop, not a brake.
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 SAIJ80BX400-50 FAQ
At the maximum operating pressure of 1.0 MPa, it delivers up to 513 kgf.
The rear adjuster acts as an external stopper that trims the effective stroke back by up to 50 mm, giving a usable travel window of 350-400 mm. It sets the end position but does not lock or hold the load without continuous air pressure.
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