Airtac SAIJ80 Adjustable Cylinder SAIJ80AX275-75
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80AX275-75 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 275mm 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
- Stroke275 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX275-75
The AirTAC SAIJ80X275-75 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster. It provides a nominal 275 mm stroke that can be fine-tuned backward by up to 75 mm, yielding a 200-275 mm usable travel window. This wide adjustment band is ideal for dialing in exact end positions during machine commissioning without swapping hardware. The bore delivers 2513 N of pull force at 0.5 MPa and 4523 N of push force at 0.9 MPa.
Built with a SUS420J2 stainless steel rod for enhanced corrosion resistance, this 80 mm bore model features a PT G3/8 port and 36 mm cushions at both ends. The extruded aluminum barrel includes sensor grooves on both sides, though this unit lacks a magnet and cannot host CMSE or DMSE switches. The rear stopper solely sets the retract end position; it is not a lock and cannot hold the load without live air pressure.
Airtac SAIJ80 Adjustable Cylinder SAIJ80AX275-75 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80AX275-75 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 275 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 SAIJ80AX275-75
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×275 | 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 SAIJ80AX275-75 Is Used
Machine Setup & Commissioning
Dial in the exact retract end-position during initial startup using the 75 mm adjustment window, avoiding the need to machine custom spacer blocks.
Product-Size Changeover
Quickly adapt a packaging line to different carton lengths by trimming the stroke back from 275 mm down to 200 mm directly at the rear stopper.
Variable End-Stop Actuation
Handle multiple push-off distances on a single conveyor without changing the cylinder, leveraging the 4523 N push force at 0.9 MPa for heavy loads.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX275-75 the Right Cylinder?
Choose this 80 mm bore when your application requires high thrust, such as stepping up from a 63 mm bore that provides 1402 N pull at 0.5 MPa. The 75 mm adjustment range is excellent for product-size changeovers on a line, allowing operators to set variable end stops on the fly instead of installing external physical stops. If your process needs to maintain position during an air-loss event, the SAIJ adjuster will not suffice—you must look at the SAIL or BSAI locking series.
As a dimensionally interchangeable ISO 15552 cylinder, this model replaces any standard 80x275 unit sharing the PT G3/8 port, 25 mm rod, and mounting interface. It supports the reduced SAIJ mounting set: Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR. Since the 275 mm stroke is substantial, always use an external guide to prevent side-loading damage to the rod.
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 SAIJ80AX275-75 FAQ
At 0.5 MPa it provides 2513 N push and 2268 N pull. At 0.9 MPa the push force increases to 4523 N. The maximum thrust is 513 kgf at 1.0 MPa.
The rear adjuster screw lets you shorten the 275 mm nominal stroke by up to 75 mm, creating a 200-275 mm travel window. The adjuster acts as a physical stop at the retract end and does not lock the load without live air.
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