Airtac SAIJ80 Adjustable Cylinder SAIJ80X185-50
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80X185-50 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 SAIJ80X185-50
The AirTAC SAIJ80X185-50 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers a robust 3518N push force at 0.7MPa, utilizing a 25mm carbon steel rod and G3/8 PT ports. By turning the external adjustment screw, you can trim the nominal 185mm travel back by up to 50mm, creating a precise 135-185mm usable window for dialing in end positions during commissioning.
This adjuster functions strictly as a mechanical stop to set the retract end position and tune the variable air cushion; it does not lock or hold the load without continuous live air pressure. The extruded aluminum barrel features sensor grooves on both sides for mounting CMSE reed or DMSE electronic switches, and the unit supports a reduced mounting set including Basic, FA, LB, TC, FTC, TCM1, and TCM2 (omitting FB, CA, CB, and CR).
Airtac SAIJ80 Adjustable Cylinder SAIJ80X185-50 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80X185-50 |
|---|---|
| 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 SAIJ80X185-50
| 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 SAIJ80X185-50 Is Used
Machine Changeover
Quickly reconfigure the 135-185mm travel window for different product sizes on a packaging line without replacing the actuator.
End-Position Tuning
Fine-tune the retract stop during initial commissioning to perfect seating forces, avoiding the need for machined external stops.
Variable End Stops
Adapt pressing or clamping distances on the fly using the rear screw, leveraging the 4523N push force at 0.9MPa for heavy assembly tasks.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80X185-50 the Right Cylinder?
Choose this 80mm bore actuator when an application requires substantial thrust—such as 2513N push force at 0.5MPa—combined with on-the-fly travel tuning. If your process demands less force, stepping down to a 63mm bore yields 1559N at 0.5MPa, whereas larger loads up to 4523N push at 0.9MPa stay well within this model's capacity. The 50mm adjustment range is ideal for product changeovers on a line, allowing operators to reposition the end stop without physically swapping the cylinder or adding external spacers.
Because the 185mm stroke is relatively short, side-loading risks are minimal, but the 25mm rod and M20x1.5 thread still handle robust dynamics. Remember that this SAIJ variant relies on live air to maintain position; for true fail-safe load holding, consider an AirTAC SAIL (pneumatic lock) or BSAI (clamp-lock) cylinder. To match this ISO 15552 dimensionally interchangeable unit, specify an 80mm bore, 185mm stroke, 50mm adjustment, G3/8 PT ports, and the desired mounting kit.
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 SAIJ80X185-50 FAQ
At 0.7MPa operating pressure, this 80mm bore cylinder provides 3518N of push force and 2268N of pull force. At 0.9MPa, the push force increases to 4523N.
The rear adjuster screw acts as a mechanical stop, allowing you to shorten the 185mm nominal stroke by up to 50mm. This creates a usable travel window of 135-185mm, though it only sets the end position and does not lock the load without live air pressure.
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