Airtac SAIJ80 Adjustable Cylinder SAIJ80BX850-50S
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80BX850-50S 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 a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ80 mm
- Stroke850 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX850-50S
The AirTAC SAIJ80X850-50-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers a robust 4523N push force at 0.9 MPa and features a SUS304 stainless steel rod for superior corrosion resistance. The integrated -S magnet supports position detection using AirTAC CMSE reed and DMSE electronic sensors installed in the dual-side barrel grooves.
With a nominal 850mm stroke and a 50mm adjustment code, this model provides an 800-850mm usable travel window. This allows you to fine-tune the retract end position at commissioning without adding external stops. The rear adjuster acts purely as a travel stop to set the end position and deceleration; it does not hold the load without live air pressure.
Airtac SAIJ80 Adjustable Cylinder SAIJ80BX850-50S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80BX850-50S |
|---|---|
| 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 | 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 SAIJ80BX850-50S
| 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 SAIJ80BX850-50S Is Used
Variable End-Stop Forming
Dial in the exact retract distance between 800 and 850mm for material forming operations that require frequent adjustments for different blank sizes.
Line Changeover Diverter
Fine-tune the stroke on a packaging line diverter during product size changeovers, ensuring precise routing without replacing the entire cylinder.
Long-Stroke Material Handling
Utilize the 850mm travel for pushing heavy pallets or workpieces, leveraging the 80mm bore thrust while relying on external guides for stability.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX850-50S the Right Cylinder?
Choose this 80mm bore when an application requires 4523N of push force at 0.9 MPa or 2513N at 0.5 MPa. If you need less force, stepping down to a 63mm bore yields 2805N at 0.9 MPa, while upgrading to a 100mm bore provides 7068N. The adjustable stroke is ideal for machines requiring variable end-stops during product changeover, offering more flexibility than a fixed-stroke SAI cylinder.
Because the 850mm stroke is long and unsupported, an external guide rail is recommended to prevent rod side-loading and premature seal wear. This SAIJ model uses PT tapered ports and a reduced mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2), omitting FB, CA, CB, and CR options. For applications requiring true load-holding without live air, consider the SAIL or BSAI series instead.
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 SAIJ80BX850-50S FAQ
At a 0.5 MPa operating pressure, this 80mm bore cylinder provides 2513N of push force and 2268N of pull force. At 0.9 MPa, the push force increases to 4523N.
The rear adjuster screw allows you to shorten the effective travel from 850mm down to 800mm, creating a 50mm adjustable window. This stopper sets the end position and deceleration but does not lock the load without continuous air pressure.
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