Airtac SAIJ80 Adjustable Cylinder SAIJ80AX850-40
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80AX850-40 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 SAIJ80AX850-40
The AirTAC SAIJ80X850-40 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that permits an effective travel window of 810 to 850 mm. Delivering 4523 N of push force at 0.9 MPa, it brings substantial power to long-stroke handling tasks. The extruded aluminum barrel includes sensor grooves on both sides for flexible switch placement.
This variant uses a SUS420J2 stainless steel rod (option A) for superior corrosion resistance and features PT tapered port threads. The rear stopper allows precise end-position tuning during commissioning without adding external stops. Note that this adjuster acts purely as a travel stop and does not hold the load without live air pressure.
Airtac SAIJ80 Adjustable Cylinder SAIJ80AX850-40 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80AX850-40 |
|---|---|
| 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 SAIJ80AX850-40
| 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 SAIJ80AX850-40 Is Used
Long-Stroke Conveying
Pushes heavy pallets along an extended transfer line, using the 40 mm adjuster to dial in the exact stopping distance for different pallet sizes.
Machine Changeover
Rapidly fine-tunes the retract end-position during product family transitions, saving downtime by avoiding complete cylinder replacement.
Heavy Component Ejection
Provides 4523 N of thrust to eject dense manufactured parts from a press area, with the stainless rod resisting harsh factory moisture.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX850-40 the Right Cylinder?
Choose this 80 mm bore when 50 mm bore cylinders (providing 1767 N push at 0.9 MPa) lack the thrust for heavy lifting, but a 100 mm bore (7068 N) would be excessive. The 40 mm adjustment range is ideal for product-size changeovers on a line, avoiding the need to physically swap cylinders when minor end-stop variations exist. For true load-holding without continuous air, select the SAIL or BSAI series instead.
With an 850 mm stroke, the 25 mm rod and M20x1.5 thread provide rigidity, but an external guide is mandatory to prevent side-load damage over this long unsupported travel. To match this cylinder exactly as an ISO 15552 replacement, specify: 80 mm bore, 850 mm stroke, PT ports, Basic/FA/LB/TC/FTC/TCM1/TCM2 mountings, and no magnet.
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 SAIJ80AX850-40 FAQ
At 0.9 MPa, this 80 mm bore cylinder generates 4523 N of push force and 2268 N of pull force. It operates at speeds between 30 and 800 mm/s.
The rear adjuster screw acts as a mechanical stop, allowing you to shorten the 850 mm nominal stroke by up to 40 mm, creating a usable travel window of 810 to 850 mm. It only sets the travel end and does not lock the load without live air.
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