Airtac SAIJ80 Adjustable Cylinder SAIJ80BX125-40
The AirTAC SAIJ80 Adjustable Cylinder SAIJ80BX125-40 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 125mm 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
- Stroke125 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 SAIJ80BX125-40
It features a SUS304 stainless steel rod and PT tapered ports. By turning the rear screw, you can trim the effective travel back by up to 40 mm, creating an 85-125 mm usable stroke window for precise end-position tuning during commissioning.
This adjustable stopper lets you dial in the exact retract distance without swapping out the entire cylinder or adding external stops. The extruded aluminum barrel includes sensor grooves on both sides, ready for CMSE reed or DMSE electronic switches if a magnet is added later. It supports a standard mounting set including Basic, FA, LB, TC, FTC, TCM1, and TCM2.
Airtac SAIJ80 Adjustable Cylinder SAIJ80BX125-40 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80BX125-40 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 125 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 SAIJ80BX125-40
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×125 | 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 SAIJ80BX125-40 Is Used
Machine Changeover
Quickly adjust the retract end-stop by up to 40mm when switching between product sizes on a packaging line without changing hardware.
End-Position Tuning
Fine-tune the 85-125mm travel window during initial commissioning to perfect the seating force of a 2513N pressing operation.
Variable End Stops
Dial in the exact stroke needed for different material feeds, using the rear screw to set precise mechanical limits.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX125-40 the Right Cylinder?
Choose this 80mm bore when you need higher thrust than a 63mm cylinder (1559N at 0.5 MPa) but want to avoid the bulk of a 100mm unit. The adjustable stroke is ideal for product changeovers on a line, allowing you to shift the end-stop by up to 40mm on the fly. If your setup requires holding a load without live air pressure, note that this rear adjuster acts only as a travel stop, not a lock; you would need an external rod lock or a SAIL cylinder for secure load holding.
For exact ISO 15552 replacement matching, verify the 80mm bore, 125mm nominal stroke, PT port threads, and the required mounting accessory. The robust 25mm rod and M20x1.5 thread handle significant side loads, though any long-stroke application still requires external guiding. This configuration uses a SUS304 rod for superior corrosion resistance.
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 SAIJ80BX125-40 FAQ
The rear adjuster acts as an external stopper that lets you shorten the nominal 125mm stroke by up to 40mm. This provides an adjustable travel window of 85-125mm so you can fine-tune the end position without swapping the cylinder.
At 0.7 MPa, the push force increases to 3518N.
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Standard models are processed and dispatched in 3-5 business days.
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