Airtac SAIJ80 Adjustable Cylinder SAIJ80X185-20
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80X185-20 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 185mm 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
- Stroke185 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80X185-20
The AirTAC SAIJ80X185-20 is a double-acting, single-rod ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a 165-185 mm usable travel window, letting you dial back the nominal 185 mm stroke by up to 20 mm during commissioning without swapping the unit or adding external stops. With a robust 25 mm carbon steel rod and an M20x1.5 thread, it handles high side loads while delivering 2513 N of push thrust at 0.5 MPa.
This model uses a PT tapered G3/8 port and relies on 36 mm variable air cushions at both ends to decelerate the payload smoothly. The rear adjuster acts strictly as a travel stop, not a lock, so it will not hold a load without live air pressure. The extruded aluminum barrel includes sensor grooves on both sides for mounting CMSE reed or DMSE electronic switches if a magnet is specified later.
Airtac SAIJ80 Adjustable Cylinder SAIJ80X185-20 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80X185-20 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 185 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 SAIJ80X185-20
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×185 | 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 SAIJ80X185-20 Is Used
Machine Setup Commissioning
Fine-tune the 165-185 mm travel window during initial machine build to hit exact end-position targets without machining custom spacers.
Product Size Changeover
Quickly adapt the rear stop for varying product lengths on a conveyor line, using the 20 mm adjustment range to accommodate different parts.
Variable End-Stop Assembly
Dial in the exact retract position for pressing or locating tasks, relying on the 2513 N of thrust to move heavy jigs securely.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80X185-20 the Right Cylinder?
Choose this 80 mm bore when your application requires roughly 2513 N of push force at 0.5 MPa. If your changeover needs less force, stepping down to a 63 mm bore yields 1559 N; stepping up to a 100 mm bore provides 3927 N. The adjustable stroke is ideal for product-size changeovers on a line, allowing you to fine-tune the retract end-position precisely. For load-holding without continuous air pressure, skip this cylinder and select an AirTAC SAIL or BSAI series. This SAIJ variant supports a reduced mounting set of Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR. It is dimensionally interchangeable with ISO 15552 cylinders of the same bore and stroke.
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 SAIJ80X185-20 FAQ
The rear adjuster screw lets you shorten the effective travel from the 185 mm nominal stroke down to 165 mm. This creates a 20 mm tuning window for exact end-positioning at commissioning, without needing external stops.
At 0.5 MPa operating pressure, the 80 mm bore provides 2513 N of push force and 2268 N of pull force. At the maximum 1.0 MPa pressure, it delivers up to 513 kgf.
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Standard models usually ship in 3-4 days.
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