Airtac SAIJ80 Adjustable Cylinder SAIJ80BX850-40
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80BX850-40 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 SAIJ80BX850-40
The AirTAC SAIJ80X850-40 is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It provides a nominal 850 mm stroke that can be fine-tuned down by up to 40 mm, yielding a usable travel window of 810-850 mm. This allows you to dial in the exact retract end-position at commissioning without swapping hardware. In the 80 mm bore class, it delivers 2513 N of push force and 2268 N of pull force at 0.5 MPa.
This configuration features a SUS304 stainless steel rod (option B) for superior corrosion resistance and uses PT tapered port threads (G3/8). The extruded aluminum barrel includes sensor grooves on both sides. Note that the rear adjuster acts purely as a mechanical stop to set the travel end and does not hold the load without live air pressure.
Airtac SAIJ80 Adjustable Cylinder SAIJ80BX850-40 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80BX850-40 |
|---|---|
| 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 SAIJ80BX850-40
| 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 SAIJ80BX850-40 Is Used
Long-Stroke Diversion
Sets precise retract positions on sorting conveyors where product lengths vary, utilizing the 810-850 mm window to accommodate different package sizes without retooling.
Machine Commissioning
Allows engineers to fine-tune the end-of-stroke position during initial setup of large equipment, absorbing alignment variances across an 850 mm travel distance.
Corrosive Environments
The SUS304 stainless steel rod makes it suitable for packaging lines or washdown areas where moisture would degrade a standard carbon steel rod.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX850-40 the Right Cylinder?
Choose this 80 mm bore when an application requires more thrust than a 63 mm cylinder (which provides 1559 N push at 0.5 MPa) but does not need the bulk of a 100 mm unit (3927 N). The adjustable 810-850 mm window is ideal for product changeovers or setup refinement on long-stroke machinery, preventing the need to bolt on external stops. Because the stroke is 850 mm, the 25 mm rod and M20x1.5 rod thread will still experience leverage forces; an external guide is recommended to prevent excessive side-loading.
To match this exact configuration for an ISO 15552 replacement, specify an 80 mm bore, 850 mm stroke, 40 mm adjustment, PT G3/8 ports, SUS304 rod, and no magnet. The mounting set is limited to Basic, FA, LB, TC, FTC, TCM1, and TCM2 (omitting FB, CA, CB, and CR). If your process requires the load to be held mechanically without live air, use a SAIL pneumatic lock or BSAI clamp-lock cylinder instead of relying on this adjuster.
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 SAIJ80BX850-40 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 the maximum 1.0 MPa pressure, it can deliver up to 513 kgf.
The rear adjusting screw acts as a mechanical stopper that lets you shorten the effective stroke by up to 40 mm from the 850 mm nominal length, creating an 810-850 mm travel window. It only sets the end position and does not lock the load without continuous air pressure.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models usually ship in 3-4 days.
Fast Reply
Most inquiries answered within 7-8 hours.
Request a Quote for Airtac SAIJ80 Adjustable Cylinder SAIJ80BX850-40
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.