Airtac SAIJ80 Adjustable Cylinder SAIJ80X185-30
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80X185-30 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 SAIJ80X185-30
The AirTAC SAIJ80X185-30 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, delivering a robust 2513N push force at 0.5 MPa. By integrating an external adjusting screw at the rear, this unit enables you to dial back the nominal 185mm stroke by up to 30mm, creating a precise 155-185mm usable travel window. This eliminates the need to swap out the entire barrel or bolt on external stops when fine-tuning end positions during commissioning.
Built with a 25mm carbon steel piston rod and an M20x1.5 rod thread, it handles substantial side loads while operating at speeds of 30-800 mm/s. The extruded aluminum barrel features sensor grooves on both sides for straightforward switch integration. It utilizes a PT tapered port thread (G3/8) and relies on a reduced mounting subset—Basic, FA, LB, TC, FTC, TCM1, and TCM2—omitting FB, CA, CB, and CR options.
Airtac SAIJ80 Adjustable Cylinder SAIJ80X185-30 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80X185-30 |
|---|---|
| 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 SAIJ80X185-30
| 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 SAIJ80X185-30 Is Used
Machine Changeovers
Set exact end positions within the 155-185mm window during product family changeovers without replacing the cylinder or adding external mechanical stops.
Stroke Calibration
Fine-tune the retract end-position at machine commissioning to dial in precise mechanical alignment, absorbing minor variations in tooling length.
Assembly Pressing
Leverage the 2513N push force at 0.5 MPa for pressing operations where the exact bottoming-out position must be adjusted on the fly.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80X185-30 the Right Cylinder?
Choose this 80mm bore when an application demands higher thrust than the 50mm class (982N push at 0.5 MPa) but does not require the full 3927N output of a 100mm cylinder. The adjustable stroke is ideal for product-size changeovers on a line, allowing operators to set variable end-stops mechanically without changing the cylinder. Because the stroke is under 300mm, side-load risks are moderate, though the 25mm rod still requires alignment for optimal seal life. When specifying an ISO 15552 replacement, match the 80mm bore, 185mm stroke, 30mm adjustment, PT port thread, and mounting style. Note that this unit lacks a magnet; adding a -S suffix enables CMSE reed and DMSE electronic sensors. Remember that the rear adjuster acts only as a travel stop and does not hold the load without live air—for fail-safe load holding, consider an AirTAC SAIL or BSAI cylinder.
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 SAIJ80X185-30 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 adjusting screw acts as a mechanical stopper that trims the effective travel. For this model, it shortens the 185mm nominal stroke, providing a usable travel window of 155-185mm. It sets the end position but does not lock the load without live air pressure.
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