Airtac SAIJ80 Adjustable Cylinder SAIJ80BX850-40S
The AirTAC SAIJ80 Adjustable Cylinder SAIJ80BX850-40S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 850mm stroke, G3/8 air ports and adjustable end cushioning. Its standardized mounting interface makes it interchangeable with other ISO 15552 cylinders at the mounting interface.
- BoreØ80 mm
- Stroke850 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX850-40S
The AirTAC SAIJ80X850-40-S is a double-acting, double-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. The SUS304 stainless steel rod provides excellent corrosion resistance for demanding environments.
This adjustable-stroke design allows you to dial in the retract end position during commissioning without swapping the cylinder or adding external stops. It includes a magnet for CMSE reed and DMSE electronic sensors, and uses a PT G3/8 port. The extruded aluminum barrel incorporates sensor grooves on both sides, while the rear adjuster acts strictly as a travel stop and does not hold the load without live air pressure.
Airtac SAIJ80 Adjustable Cylinder SAIJ80BX850-40S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80BX850-40S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 850 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 | 2268 N | 2268 N |
| 0.7 MPa | 3175 N | — |
| Max (@1.0 MPa) | 463 kgf | |
Double-rod model: the rod passes through the rear cover, so both piston faces lose rod area and push is shown at the annular-area value. Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ80 Adjustable Cylinder SAIJ80BX850-40S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×850 | 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 SAIJ80BX850-40S Is Used
Variable End-Stop Tuning
Dial in the exact retract position within the 810-850mm window during machine commissioning to accommodate varying product lengths without external stopper blocks.
Product Changeover
Quickly adjust the stroke end on packaging lines when switching between different package sizes, leveraging the 40mm adjustment range for rapid format changes.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX850-40S the Right Cylinder?
The adjustable 810-850mm window is ideal for product changeovers, letting you fine-tune the end stop on the fly instead of machining new fixed stops. For a fixed end position without the adjuster, the standard SAI cylinder is sufficient.
Because the 850mm stroke is long and unsupported, an external guide is required to prevent excessive side loading on the SUS304 rod. To match this ISO 15552 interchangeable cylinder, specify: 80mm bore, 850mm stroke, 40mm adjustment, PT G3/8 port, SUS304 rod, and the -S magnet. Note that a plain SAIJ does not hold position without air; for load-holding, consider the SAIL or BSAI series. Mounting options include 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 SAIJ80BX850-40S FAQ
At 0.7 MPa, the push force increases to 3518N.
The rear adjuster screw allows you to shorten the effective stroke by up to 40mm from the 850mm nominal length, providing a usable travel window of 810-850mm. The adjuster functions as a mechanical stop for end-position tuning and does not lock the load without air pressure.
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Covers non-human-caused product damage.
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Standard models are processed and dispatched in 3-5 business days.
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