Airtac SAIJ80 Adjustable Cylinder SAIJ80X185-20S
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80X185-20S 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 SAIJ80X185-20S
The AirTAC SAIJ80X185-20-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers 2513N of push force at 0.5 MPa and features a 25mm carbon steel rod with an M20x1.5 thread. By turning the rear screw, you achieve a usable travel window of 165 to 185mm, enabling precise end-position tuning at commissioning without swapping out the entire unit.
This extruded aluminum profile cylinder includes a magnet (-S) for position sensing and uses PT tapered ports sized G3/8. It supports speeds from 30 to 800mm/s and utilizes adjustable air cushions at both ends to decelerate the load smoothly. The rear adjuster acts purely as a travel stop for setting the retract position, so it will not hold the load safely without live air pressure.
Airtac SAIJ80 Adjustable Cylinder SAIJ80X185-20S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80X185-20S |
|---|---|
| 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 SAIJ80X185-20S
| 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 SAIJ80X185-20S Is Used
Product Changeovers
Dial in the 165 to 185mm travel window during format changes on a packaging line, allowing quick adaptation to different carton sizes without changing hardware.
End-Stop Calibration
Fine-tune the retract end position during machine commissioning to perfectly seat heavy 80mm bore components, using the rear stopper instead of external shims.
Variable Positioning
Provide adjustable retract stops on an assembly station where the exact resting position of the tooling must be tweaked between production runs.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80X185-20S the Right Cylinder?
Choose this 80mm bore when an application requires more thrust than a 63mm cylinder (1559N push at 0.5 MPa) but less than a 100mm bore (3927N push at 0.5 MPa). The adjustable 165 to 185mm window is ideal for machine setups requiring variable end-stops or product changeovers, avoiding the need to bolt on external stops or buy a fixed-stroke SAI cylinder. To match this ISO 15552 dimensionally interchangeable cylinder, specify the 80mm bore, 185mm stroke, 20mm adjustment, PT G3/8 port, and -S magnet.
Although the 25mm rod handles side loads well, an 185mm stroke is moderate enough that standard mounting usually suffices. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2 options, omitting FB, CA, CB, and CR. For load-holding without continuous air pressure, select a SAIL locking cylinder or an external rod lock, as the adjuster here is not a brake.
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 SAIJ80X185-20S 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 trim the effective travel back by up to 20mm, creating a usable stroke window of 165 to 185mm. This stopper sets the end position but does not lock the load without live air pressure.
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