Airtac SAIJ80 Adjustable Cylinder SAIJ80X185-30S
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80X185-30S 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 SAIJ80X185-30S
The AirTAC SAIJ80X185-30-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to fine-tune the retract end-position without adding external stops. It provides a usable travel window of 155 to 185 mm, making it ideal for machine setups requiring variable end-stops. The 80 mm bore delivers 2513 N of push force at 0.5 MPa and up to 4523 N at 0.9 MPa.
This unit includes a standard carbon steel piston rod with an M20x1.5 male thread, paired with PT (tapered) G3/8 air ports. The integrated magnet supports AirTAC CMSE reed and DMSE electronic sensors, which seat directly into the dual-side extruded aluminum barrel grooves. It utilizes variable air cushions at both ends to decelerate the load, while the rear mechanical stopper handles the final position tuning.
Airtac SAIJ80 Adjustable Cylinder SAIJ80X185-30S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80X185-30S |
|---|---|
| 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 SAIJ80X185-30S
| 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 SAIJ80X185-30S Is Used
Machine Changeover
Dial in the 155 to 185 mm travel window during product size changes on a packaging line without swapping the physical cylinder.
End-Stop Calibration
Use the rear adjusting screw to precisely set the retract position during commissioning, avoiding the need for external mechanical stops.
Variable Assembly Stroke
Adapt the effective stroke on the fly for automated assembly machines handling parts of slightly varying heights.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80X185-30S the Right Cylinder?
Choose this adjustable-stroke model when a fixed 185 mm SAI cylinder cannot accommodate product size changes or minor positioning variations on a line. If your application requires less thrust, stepping down to a 63 mm bore yields 1559 N at 0.5 MPa; stepping up to a 100 mm bore provides 3927 N. To replace this cylinder with an ISO 15552 equivalent, match the 80 mm bore, 185 mm stroke, 30 mm adjustment, PT G3/8 port, and the -S magnet requirement.
Because the nominal stroke is under 300 mm, side-load stress on the M20x1.5 rod is moderate, though an external guide remains necessary for heavy radial loads. Remember that the rear adjuster acts strictly as a travel stop, not a lock; the SAIJ80X185-30-S will not hold its load without live air pressure. For true fail-safe load holding without air, select 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 SAIJ80X185-30S FAQ
At 0.5 MPa it provides 2513 N of push force and 2268 N of pull force. At 0.9 MPa, the push force increases to 4523 N.
The rear adjuster screw lets you shorten the effective travel from the nominal 185 mm down to 155 mm, creating a 30 mm tuning window to set the exact retract end-position without replacing the cylinder.
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