Airtac SAIJ80 Adjustable Cylinder SAIJ80AX325-40
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80AX325-40 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 325mm stroke, G3/8 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ80 mm
- Stroke325 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX325-40
The AirTAC SAIJ80X325-40 is a double-acting, single-rod ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a 285-325 mm usable travel window by trimming the 325 mm nominal stroke back by up to 40 mm. Delivering 4523 N of push force at 0.9 MPa, it handles demanding operations while utilizing a SUS420J2 stainless steel rod for enhanced corrosion resistance.
This model uses a PT tapered port thread and relies on a 25 mm rod with an M20x1.5 thread. The extruded aluminum barrel includes sensor grooves on both sides, though this specific configuration omits the magnet, meaning CMSE or DMSE electronic sensors cannot be used without a -S variant. The rear adjuster acts purely as a travel stop for end-position tuning, not as a lock.
Airtac SAIJ80 Adjustable Cylinder SAIJ80AX325-40 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80AX325-40 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 325 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 | 2513 N | 2268 N |
| 0.7 MPa | 3519 N | — |
| Max (@1.0 MPa) | 513 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ80 Adjustable Cylinder SAIJ80AX325-40
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×325 | 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 SAIJ80AX325-40 Is Used
Machine Changeover
Dial in the 285-325 mm travel window during product size transitions without replacing the cylinder or bolting on external stops.
End-Position Tuning
Use the 40 mm rear adjuster to precisely set the retract end-stop during commissioning, compensating for mechanical tolerances.
High-Force Positioning
Leverage 4523 N of push force at 0.9 MPa to move heavy jigs, using the SUS420J2 rod in environments where standard carbon steel might corrode.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX325-40 the Right Cylinder?
Choose this 80 mm bore when 50 mm (1374 N push at 0.5 MPa) is insufficient but 100 mm (5497 N push at 0.5 MPa) is excessive. The 40 mm adjustment range is ideal for product changeovers, allowing you to fine-tune the retract end position without swapping cylinders or adding external stops. For an exact fixed stroke, the standard SAI is simpler.
Because the stroke is 325 mm, the 25 mm rod needs external guidance to prevent excessive side-loading on the bearings. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR. Note that this cylinder will not hold a load without live air; for dead-air holding, use SAIL or BSAI.
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 SAIJ80AX325-40 FAQ
The 325 mm nominal stroke can be mechanically shortened by up to 40 mm via a rear adjusting screw, giving an active travel window of 285-325 mm. The screw acts as a physical stop to tune the end position and does not lock the load without live air pressure.
At 0.9 MPa, the 80 mm bore provides 4523 N of push force and 2268 N of pull force. The operating speed ranges from 30-800 mm/s, supported by variable air cushions at both ends.
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