Airtac SAIJ80 Adjustable Cylinder SAIJ80BX300-40
The AirTAC SAIJ80 Adjustable Cylinder SAIJ80BX300-40 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 300mm 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
- Stroke300 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 SAIJ80BX300-40
The AirTAC SAIJ80X300-40 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, allowing you to dial back the 300 mm nominal stroke by up to 40 mm for a usable travel window of 260-300 mm. It delivers robust thrust, pushing 4523 N at 0.9 MPa, making it suitable for heavy-duty positioning tasks. The extruded aluminum barrel features sensor grooves on both sides for straightforward switch integration.
This variant features a SUS304 stainless steel rod for superior corrosion resistance and utilizes PT tapered port threads. The rear adjustment screw acts purely as a mechanical stop to fine-tune the end position during commissioning; it does not lock the load without live air pressure. For load-holding requirements without continuous air, an external rod lock or the AirTAC SAIL series is recommended.
Airtac SAIJ80 Adjustable Cylinder SAIJ80BX300-40 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80BX300-40 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 300 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 SAIJ80BX300-40
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×300 | 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 SAIJ80BX300-40 Is Used
Product Size Changeovers
Dial in the exact 260 to 300 mm end-stop during product family transitions without mechanically swapping the cylinder or adding spacer blocks.
Automated Assembly Stops
Use the rear mechanical stop to set precise retraction limits on varying assembly tooling layouts while maintaining a standard ISO 15552 footprint.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX300-40 the Right Cylinder?
Choose this 80 mm bore when an application demands high force, such as 3518 N at 0.7 MPa, stepping up from a 63 mm bore that provides 2182 N. The adjustable 260-300 mm window is ideal for product changeovers on a line, eliminating the need to physically swap cylinders or bolt on external stop blocks. If exact end-positioning is fixed and never changes, a standard SAI cylinder suffices, but the SAIJ excels in flexible setups.
When replacing an ISO 15552 cylinder, match the 80 mm bore, 300 mm stroke, PT port threads, and desired mounting style. SAIJ supports a specific mounting subset: Basic, FA, LB, TC, FTC, TCM1, and TCM2. Because this unit features a 300 mm stroke, the 25 mm rod diameter should still be paired with an external guide to prevent excessive side-loading on the piston.
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 SAIJ80BX300-40 FAQ
At 0.9 MPa, the push force increases to 4523 N.
The rear adjuster screw acts as a mechanical stop, allowing you to shorten the 300 mm stroke by up to 40 mm, creating a 260-300 mm travel window. It only sets the end position and does not hold the load without live air.
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