Airtac SAIJ80 Adjustable Cylinder SAIJ80X300-75
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80X300-75 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 a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ80 mm
- Stroke300 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80X300-75
The AirTAC SAIJ80X300-75 is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers a robust 2513N of push force at 0.5 MPa and features a 300mm nominal stroke that can be dialed back by up to 75mm, yielding a highly versatile 225-300mm usable travel window. This built-in adjustability allows operators to fine-tune end positions at commissioning without swapping out the entire unit.
The bore utilizes a G3/8 port and a 25mm carbon steel rod with an M20x1.5 thread, providing substantial rigidity for heavy loads. Mounting options include Basic, FA, LB, TC, FTC, TCM1, and TCM2. The extruded aluminum barrel incorporates sensor grooves on both sides for CMSE or DMSE switches, though this specific configuration ships without a magnet. The rear screw acts purely as a travel stop to set deceleration and does not hold the load without live air pressure.
Airtac SAIJ80 Adjustable Cylinder SAIJ80X300-75 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80X300-75 |
|---|---|
| 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 | 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 SAIJ80X300-75
| 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 SAIJ80X300-75 Is Used
Product Changeovers
Dial in the 225-300mm travel window during format changes on packaging lines, using the rear screw to set new retraction endpoints rapidly.
Machine Setup
Fine-tune the end-of-stroke position during commissioning to prevent crashes, relying on the 25mm carbon steel rod for rigid positioning.
Variable End Stops
Adjust the effective stroke on the fly for diverter gates handling different package sizes without bolting on external physical stops.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80X300-75 the Right Cylinder?
Select this 80mm bore when an application requires significant thrust—such as the 2513N push force at 0.5 MPa—but demands a variable end-stop for product changeovers. If your setup needs less force, stepping down to a 63mm bore yields 1559N; if more is required, a 100mm bore provides 3927N. Choose this adjustable-stroke SAIJ model over a fixed SAI when you need 225-300mm of travel flexibility to perfectly tune the retraction point without adding external stops.
Because this cylinder features a 300mm stroke, the extended rod is subject to increased side-loading risks; an external guide is recommended to prevent premature seal wear. To match this exact unit for an ISO 15552 replacement, specify the 80mm bore, 300mm stroke, 75mm adjustment, PT tapered port thread, and the appropriate mounting accessory. For applications requiring the load to be held mechanically without continuous air pressure, consider the SAIL or BSAI series instead, as the SAIJ adjuster is not a locking mechanism.
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 SAIJ80X300-75 FAQ
At 0.5 MPa operating pressure, this 80mm bore cylinder provides 2513N of push force and 2268N of pull force. At 0.7 MPa, the push force increases to 3518N.
The rear adjuster screw allows you to shorten the 300mm nominal stroke by up to 75mm, creating a 225-300mm usable travel window. It functions as a hard stop to tune the end position and relies on the air cushion for deceleration.
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