Airtac SAIJ80 Adjustable Cylinder SAIJ80X180-20S
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80X180-20S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 180mm 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
- Stroke180 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80X180-20S
The AirTAC SAIJ80X180-20-S is a double-acting ISO 15552 profile cylinder with a 80 mm bore and an integrated rear stroke adjuster. It provides a 2513 N push force at 0.5 MPa and features a carbon steel piston rod. The built-in magnet enables position sensing with CMSE reed and DMSE solid-state switches.
This model provides a 160 to 180 mm usable travel window, letting you dial back the retract position by up to 20 mm. The PT tapered port threads match the standard G3/8 air supply. The rear stopper sets the end position but does not lock the load; use SAIL or BSAI cylinders for load-holding without live air pressure.
Airtac SAIJ80 Adjustable Cylinder SAIJ80X180-20S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80X180-20S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 180 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 SAIJ80X180-20S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×180 | 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 SAIJ80X180-20S Is Used
Machine Changeover
Fine-tune the 160-180 mm retract position on packaging lines when switching product sizes without swapping the cylinder.
End-Stop Calibration
Dial in the exact end position during commissioning to perfect the stroke and prevent mechanical crashes.
Variable Forming Stops
Adjust the travel window on the fly for metal bending or forming tools that need precise depth control.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80X180-20S the Right Cylinder?
Select this 80 mm bore when 50 mm (982 N) is too weak or you want to avoid over-cycling a 100 mm (3927 N) unit. Choose the SAIJ adjustable-stroke variant over a fixed SAI to fine-tune the end position during machine setup or product changeover without adding external stops. The 25 mm rod and M20x1.5 thread handle high side loads, but an external guide is recommended for long unsupported strokes.
ISO 15552 replacement match: 80 mm bore, 180 mm stroke, 20 mm adjustment, PT G3/8 port, -S magnet. Mounting options are Basic, FA, LB, TC, FTC, TCM1, and TCM2.
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 SAIJ80X180-20S FAQ
At 0.5 MPa it provides a 2513 N push force and a 2268 N pull force. At 0.7 MPa the push force increases to 3518 N.
The rear adjuster screw lets you shorten the 180 mm nominal stroke by up to 20 mm, creating a 160 to 180 mm usable travel window. It acts as a stop and does not lock the load without air pressure.
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