Airtac SAIJ80 Adjustable Cylinder SAIJ80AX155-20
The AirTAC SAIJ80 Adjustable Cylinder SAIJ80AX155-20 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 SAIJ80AX155-20
The AirTAC SAIJ80X155-20 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a usable travel window of 135-155 mm, allowing you to dial back the nominal 155 mm stroke by up to 20 mm during commissioning. In this configuration, the piston rod is manufactured from SUS420J2 stainless steel (code A), offering enhanced corrosion resistance compared to standard carbon steel. The extruded aluminum barrel includes sensor grooves on both sides for flexible mounting of CMSE or DMSE switches.
The PT tapered port size is G3/8, and the unit relies on variable air cushions at both ends to decelerate the moving load. It is important to note that the rear adjuster acts strictly as a mechanical stop to set the end position; it does not function as a lock or brake to hold the load without continuous live air pressure.
Airtac SAIJ80 Adjustable Cylinder SAIJ80AX155-20 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80AX155-20 |
|---|---|
| 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 SAIJ80AX155-20
| 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 SAIJ80AX155-20 Is Used
Machine Changeover
Dial in the 135-155 mm travel window during product size changes without physically replacing the cylinder or reworking external hard stops.
End-Position Tuning
Fine-tune the retract stop at commissioning to perfect the seating pressure of 2513 N at 0.5 MPa without mechanical shimming.
Stainless Rod Actuation
Leverage the SUS420J2 stainless steel rod for light-duty washdown or corrosive-adjacent manufacturing tasks requiring reliable 80 mm bore thrust.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX155-20 the Right Cylinder?
Choose this 80 mm bore when your application requires substantial thrust—such as 2513 N at 0.5 MPa—and you need the flexibility to fine-tune the retract end position without swapping out the cylinder or adding external stops. The adjustable stroke is ideal for product changeovers on a line where exact end-of-travel positioning varies slightly.
For an exact ISO 15552 replacement match, specify an 80 mm bore, 155 mm nominal stroke, a 20 mm adjustment range, PT G3/8 ports, and SUS420J2 stainless steel rod material. Because the nominal stroke is 155 mm, external side-load guiding is less critical than on longer strokes, but the robust 25 mm rod and M20x1.5 thread handle standard operational stresses effectively. Remember that a plain SAIJ does not hold its position unpowered; for load-holding without live air, consider the SAIL or BSAI series.
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 SAIJ80AX155-20 FAQ
The rear adjuster screw lets you shorten the effective stroke by up to 20 mm, creating a usable travel window of 135 to 155 mm. It acts as a mechanical stop to set the end position and does not lock the load in place without air pressure.
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