Airtac SAIJ80 Adjustable Cylinder SAIJ80BX325-20
The AirTAC SAIJ80 Adjustable Cylinder SAIJ80BX325-20 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 interchangeable with other ISO 15552 cylinders at the mounting interface.
- BoreØ80 mm
- Stroke325 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 SAIJ80BX325-20
By turning the external stopper screw, you can trim the effective travel back by up to 20mm, creating a precise 305-325mm usable stroke window without needing external stops. This feature is invaluable for fine-tuning end positions during machine commissioning or product changeovers.
Built with a SUS304 stainless steel rod for superior corrosion resistance, this 80mm bore actuator operates at speeds of 30-800mm/s. It features PT tapered ports and variable air cushions at both ends to decelerate the load smoothly. The adjuster acts strictly as a travel stop and does not hold the load without live air pressure, so applications requiring true position holding should utilize an external rod lock or a SAIL cylinder.
Airtac SAIJ80 Adjustable Cylinder SAIJ80BX325-20 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80BX325-20 |
|---|---|
| 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 | 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 SAIJ80BX325-20
| 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 SAIJ80BX325-20 Is Used
Machine Commissioning
Dial in the exact 305 to 325mm end-position during initial setup to perfect a pressing or clamping operation without machining new spacers.
Product Changeover
Quickly adjust the stroke length on a packaging line to accommodate different carton sizes, reducing downtime between production runs.
Variable End Stops
Use the rear stopper screw to set precise retract positions for multi-stage assembly processes that require slight travel variations.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX325-20 the Right Cylinder?
The adjustable stroke is chosen over a fixed SAI model when you need variable end-stops or on-the-fly positioning tweaks.
For an exact ISO 15552 replacement, match the 80mm bore, 325mm stroke, 20mm adjustment, PT port thread, and desired mounting bracket. SAIJ supports a reduced mounting set of Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR options. Because the 325mm stroke is relatively long, the 25mm rod and M20x1.5 thread still require an external guide to prevent excessive side-loading on the unsupported length. Note that without a magnet, this unit cannot use CMSE or DMSE sensors for position detection.
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 SAIJ80BX325-20 FAQ
The rear adjuster screw acts as a mechanical stop that lets you shorten the nominal 325mm stroke by up to 20mm, providing a usable travel window of 305 to 325mm. It only sets the travel end and does not lock or hold the load without continuous air pressure.
At the maximum rated pressure of 1.0 MPa, it can deliver up to 513 kgf.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models are processed and dispatched in 3-5 business days.
Fast Reply
Most inquiries answered within 7-8 hours.
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