Airtac SAIJ80 Adjustable Cylinder SAIJ80BX80-20S
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80BX80-20S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 80mm 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
- Stroke80 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX80-20S
The AirTAC SAIJ80X80-20-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, allowing you to dial back the nominal 80 mm travel by up to 20 mm. This creates a precise 60-80 mm usable end-position window, ideal for fine-tuning machine setup without adding external stops. It delivers 2513 N of push force at 0.5 MPa and features a SUS304 stainless steel rod for superior corrosion resistance.
This model includes a built-in magnet for position sensing with CMSE reed or DMSE electronic switches. The extruded aluminum barrel provides sensor grooves on both sides, and the PT tapered port threads ensure a tight pneumatic seal. The rear adjuster acts purely as a travel stop and does not hold the load without live air pressure.
Airtac SAIJ80 Adjustable Cylinder SAIJ80BX80-20S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80BX80-20S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 80 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 SAIJ80BX80-20S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×80 | 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 SAIJ80BX80-20S Is Used
Product Changeovers
Dial in the 60-80 mm travel window during format changes on a packaging line, using the rear screw to set exact end positions without swapping cylinders.
End-Stop Calibration
Fine-tune the final retract position during machine commissioning, preventing hard mechanical crashes by trimming the stroke up to 20 mm.
Corrosive Assembly Tasks
Leverage the 2513 N push force and SUS304 stainless steel rod for robust actuation in washdown or mildly corrosive manufacturing environments.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX80-20S the Right Cylinder?
Choose this 80 mm bore when an application requires roughly 2513 N of push force at 0.5 MPa, stepping up from a 63 mm bore that provides 1559 N. The adjustable 60-80 mm travel window is perfect for product changeovers where exact end-of-stroke positioning varies. For load-holding without continuous air pressure, this cylinder is insufficient as the adjuster is not a lock; consider an AirTAC SAIL or BSAI variant instead.
To match this ISO 15552 interchangeable cylinder for a replacement, verify the 80 mm bore, 80 mm stroke, 20 mm adjustment range, PT port threads, and the -S magnet option. The 25 mm rod diameter and M20x1.5 rod thread handle substantial side loads, though any stroke over 300 mm would require external guide rails to prevent rod bending.
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 SAIJ80BX80-20S FAQ
At 0.5 MPa operating pressure, this 80 mm bore cylinder provides 2513 N of push force and 2268 N of pull force. At a maximum 1.0 MPa, the push force reaches 4523 N.
The rear adjuster acts as a mechanical stop that lets you shorten the 80 mm nominal stroke by up to 20 mm, creating a 60-80 mm travel window. It only sets the end position and does not lock the load without live air.
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