Airtac SAIJ80 Adjustable Cylinder SAIJ80BX65-40
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80BX65-40 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 65mm 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
- Stroke65 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX65-40
The AirTAC SAIJ80X65-40 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, delivering a robust 2513N push force at 0.5 MPa. It features a SUS304 stainless steel piston rod and a PT tapered G3/8 port. By turning the external rear stopper, you can shorten the effective travel, creating a precise 25-65mm usable stroke window for exact end-position tuning.
This adjustable design eliminates the need to swap cylinders or bolt on external stops during machine commissioning. The extruded aluminum barrel includes sensor grooves on both sides for flexible mounting of CMSE reed or DMSE electronic switches, while the generous 25mm rod and M20x1.5 thread provide high rigidity against side loads.
Airtac SAIJ80 Adjustable Cylinder SAIJ80BX65-40 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80BX65-40 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 65 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 SAIJ80BX65-40
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×65 | 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 SAIJ80BX65-40 Is Used
Machine Setup Tuning
Dial in the exact 25-65mm travel window during commissioning to perfectly time the machine cycle without swapping hardware.
Product Size Changeover
Quickly retract the end position by up to 40mm to accommodate varying product lengths on the same production line.
Variable End-Stop Positioning
Fine-tune the retract distance on the fly for delicate pressing or clamping tasks that require precise depth control.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX65-40 the Right Cylinder?
Choose this 80mm bore when a 50mm bore falls short on power, as stepping down to a 50mm cylinder drops the 0.5 MPa push force to 982N. The SAIJ80X65-40 is selected specifically when you need variable end-stops for product changeovers rather than a fixed-stroke SAI cylinder. It supports a mounting subset of Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR options.
Remember that the rear adjuster functions strictly as a travel stop, not a lock; the cylinder will not hold its load without live air pressure. For secure load-holding without continuous pressure, consider an external rod lock or related types like the SAIL or BSAI clamp-lock cylinders.
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 SAIJ80BX65-40 FAQ
At 0.5 MPa operating pressure, this 80mm bore cylinder generates 2513N of push force and 2268N of pull force. It can reach up to 4523N push force at 0.9 MPa.
The rear adjuster screw lets you trim the nominal 65mm stroke back by up to 40mm. This provides a usable travel window of 25-65mm, allowing precise end-position tuning without replacing the cylinder.
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