Airtac SAIJ80 Adjustable Cylinder SAIJ80BX850-50
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80BX850-50 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 SAIJ80BX850-50
The AirTAC SAIJ80X850-50 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that permits precise end-position tuning. Its 850 mm nominal stroke can be dialed back by up to 50 mm, yielding an 800-850 mm usable travel window for exact commissioning without external stops. Delivering 4523 N of push force at 0.9 MPa, it is built for heavy-duty positioning tasks.
This variant uses a SUS304 stainless steel rod for corrosion resistance and features tapered PT port threads. The extruded aluminum barrel includes sensor grooves on both sides for flexible mounting of CMSE or DMSE switches. The rear adjustment mechanism acts strictly as a travel stop to decelerate the piston, not as a lock, meaning live air pressure is required to hold the load in place.
Airtac SAIJ80 Adjustable Cylinder SAIJ80BX850-50 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80BX850-50 |
|---|---|
| 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 SAIJ80BX850-50
| 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 SAIJ80BX850-50 Is Used
Variable End-Stop Machining
Dial in the exact 800-850 mm clamping position during machine setup, allowing rapid adaptation to different workpiece lengths without swapping cylinders.
Product Changeover Diverters
Fine-tune the retract stroke on packaging lines to accommodate varying box sizes, using the rear screw to set new end positions quickly.
Heavy-Duty Positioning
Leverage the 4523 N push force at 0.9 MPa to move heavy pallets, adjusting the travel limit by up to 50 mm to clear obstructions on the floor.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX850-50 the Right Cylinder?
Choose this 80 mm bore cylinder when an application requires substantial thrust—stepping down to a 63 mm bore reduces push force to 2805 N at 0.9 MPa. The adjustable 800-850 mm travel window is ideal for machinery requiring variable end-stops during product changeovers. Because the 850 mm stroke is substantial, an external guide is recommended to prevent rod side-loading and premature seal wear.
For fixed-travel applications without the need for end-position tuning, a standard SAI cylinder is sufficient. If the mechanism must maintain its position or hold a load without continuous air pressure, this cylinder will not suffice; consider an SAIL pneumatic-lock or BSAI clamp-lock cylinder instead. This model is dimensionally interchangeable per ISO 15552, utilizing PT ports and the standard SAIJ mounting set (Basic, FA, LB, TC, FTC, TCM1, 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 SAIJ80BX850-50 FAQ
The rear adjuster screw acts as a mechanical stop that shortens the effective stroke by up to 50 mm. This creates an 800-850 mm travel window, allowing you to fine-tune the retract end position at commissioning without adding external stops. It only decelerates the travel end; it does not lock the load.
At 0.9 MPa operating pressure, the SAIJ80X850-50 provides 4523 N of push force and 4071 N of pull force. The maximum thrust is 513 kgf at 1.0 MPa.
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