Airtac SAIJ80 Adjustable Cylinder SAIJ80BX155-20
The AirTAC SAIJ80 Adjustable Cylinder SAIJ80BX155-20 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 155mm 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
- Stroke155 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 SAIJ80BX155-20
By turning the rear screw, you can trim the effective travel back by up to 20mm, creating a precise 135-155mm usable window. This allows you to fine-tune the retract end position during commissioning without swapping out the entire actuator or adding bulky external stops.
This bore features a 25mm rod with an M20x1.5 thread, paired with a PT tapered G3/8 port. The rod is constructed from SUS304 stainless steel (code B) for superior corrosion resistance. Remember that the rear adjuster functions strictly as a travel stop to set the end position, not as a locking device; it will not hold the load without continuous live air pressure.
Airtac SAIJ80 Adjustable Cylinder SAIJ80BX155-20 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80BX155-20 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 155 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 SAIJ80BX155-20
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×155 | 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 SAIJ80BX155-20 Is Used
Machine Changeover
Dial in the 135-155mm travel window during product size changes to perfectly position parts without machining new hard stops.
End-Stop Calibration
Fine-tune the retract position during initial commissioning to clear obstructions and optimize the mechanical cycle timing.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX155-20 the Right Cylinder?
Select this 80mm bore actuator when an application requires moderate thrust and on-the-fly end-position tuning. The adjustable stroke is ideal for product changeovers on a line, whereas a fixed-stroke SAI is sufficient for repetitive single-purpose tasks. Because the 155mm stroke is under 300mm, side-load stress is minimal, though the robust 25mm rod handles standard loads effectively.
To match this exact configuration for an ISO 15552 replacement, specify an 80mm bore, 155mm nominal stroke, 20mm adjustment range, PT port thread, SUS304 (B) rod material, and no magnet. Note that SAIJ mounting options are limited to Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR. For applications requiring true load-holding without live air, consider an external rod lock or the AirTAC SAIL 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 SAIJ80BX155-20 FAQ
At 0.7 MPa, the push force increases to 3518N.
The rear adjuster screw acts as a mechanical stop that lets you shorten the nominal 155mm stroke by up to 20mm, providing an effective travel range of 135-155mm. It sets the end position but does not lock the load without live air.
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Covers non-human-caused product damage.
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Standard models are processed and dispatched in 3-5 business days.
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