Airtac SAIJ80 Adjustable Cylinder SAIJ80BX240-20S
The AirTAC SAIJ80 Adjustable Cylinder SAIJ80BX240-20S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 240mm 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
- Stroke240 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 SAIJ80BX240-20S
The AirTAC SAIJ80X240-20-S is a double-acting, double-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It provides a 25mm rod and a nominal 240mm stroke that can be fine-tuned down by 20mm, giving you a precise 220-240mm usable travel window.
This configuration features a SUS304 stainless steel rod and a built-in magnet for use with AirTAC CMSE reed and DMSE electronic solid-state sensors. The extruded aluminum barrel includes sensor grooves on both sides, and the rear adjuster acts purely as a mechanical stop to dial in end positions without adding external stops. It is not a locking device and requires live air to hold a load.
Airtac SAIJ80 Adjustable Cylinder SAIJ80BX240-20S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80BX240-20S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 240 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 SAIJ80BX240-20S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×240 | 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 SAIJ80BX240-20S Is Used
Machine Changeovers
Dial in the 220-240mm travel window during product size changes without physically replacing the cylinder or adding external mechanical stops.
End-Position Tuning
Fine-tune the retract stop at commissioning to perfectly align heavy 2513N press or push operations without cylinder swap-outs.
Heavy Assembly Lines
Leverage the 80mm bore and SUS304 rod for robust actuation while using the rear stopper to compensate for mechanical tolerance stack-up.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX240-20S the Right Cylinder?
The adjustable 220-240mm travel window is ideal for product changeovers or commissioning setups where the exact end-of-stroke position needs fine-tuning on the fly, saving you from swapping out a fixed-stroke SAI cylinder.
Because the 240mm stroke is over 300mm, ensure you use an external guide to support the rod and prevent excessive side-loading. To match this exact ISO 15552 interchangeable replacement, specify an 80mm bore, 240mm stroke, 20mm adjustment, PT tapered port thread, SUS304 (B) rod material, a -S magnet, and a mounting option from the SAIJ subset (Basic, FA, LB, TC, FTC, TCM1, TCM2). For load-holding without live air pressure, consider the SAIL or BSAI series instead.
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 SAIJ80BX240-20S FAQ
At 0.9MPa, the push force increases to 4523N.
The rear adjuster acts as a mechanical stop that lets you shorten the 240mm nominal stroke by up to 20mm, creating a 220-240mm usable travel window. It only sets the end position; it does not lock the load without live air.
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