Airtac SAIJ80 Adjustable Cylinder SAIJ80BX700-20S
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80BX700-20S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 700mm 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
- Stroke700 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX700-20S
The AirTAC SAIJ80X700-20-S is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a usable travel window of 680 to 700 mm, letting you dial back the nominal 700 mm stroke by up to 20 mm during commissioning. In the 80 mm bore class, it generates 2513 N of push force and 2268 N of pull force at 0.5 MPa, operating at speeds between 30 and 800 mm/s.
This variant includes a SUS304 stainless steel rod (option B) for corrosion resistance and a PT tapered port thread. It carries a built-in magnet for position sensing, compatible with AirTAC CMSE reed and DMSE electronic switches mounted in the dual-side sensor grooves. The rear adjuster acts purely as a mechanical stop to set the end position and does not hold the load without live air pressure.
Airtac SAIJ80 Adjustable Cylinder SAIJ80BX700-20S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80BX700-20S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 700 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 SAIJ80BX700-20S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×700 | 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 SAIJ80BX700-20S Is Used
Variable End-Stop Tuning
Adjust the retract position by up to 20 mm to accommodate different package sizes on a conveyor line without physically remounting the actuator.
Machine Setup Commissioning
Fine-tune the 680 to 700 mm travel window during initial machine commissioning to perfectly time the stroke end-position and avoid mechanical crashes.
Corrosive Environment Handling
Leverage the SUS304 stainless steel rod and 2513 N push force to operate reliably in precision manufacturing areas exposed to moisture or washdowns.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX700-20S the Right Cylinder?
Choose this 80 mm bore when the 50 mm bore (982 N push at 0.5 MPa) is insufficient but you want to avoid stepping up to the heavier 100 mm class (3927 N). The 20 mm adjustment window is ideal for product changeovers on a line, allowing you to fine-tune the retract end position without swapping the cylinder or adding external stops. For load-holding without continuous air pressure, select a SAIL or BSAI cylinder instead, as the SAIJ adjuster is not a lock.
Because the 700 mm stroke is long, the 25 mm rod diameter and M20x1.5 rod thread provide robust support, but an external guide is required to handle side loads and prevent binding over extended travel. This SAIJ model is dimensionally interchangeable per ISO 15552 and uses the standard SAIJ mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2), omitting FB, CA, CB, and CR brackets.
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 SAIJ80BX700-20S FAQ
At 0.5 MPa operating pressure, the 80 mm bore generates a push force of 2513 N and a pull force of 2268 N. At 0.7 MPa, the push force increases to 3518 N.
The rear adjuster screw acts as a mechanical stop, allowing you to shorten the effective travel from 700 mm down to 680 mm. It sets the end position but does not lock the load without live air pressure.
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