Airtac SAIJ80 Adjustable Cylinder SAIJ80AX850-20S
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80AX850-20S 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 SAIJ80AX850-20S
The AirTAC SAIJ80X850-20-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a nominal 850 mm stroke that can be dialed back by up to 20 mm, giving you an exact 830-850 mm travel window for precise end-position tuning during commissioning. In this configuration, it delivers 4523 N of push force at 0.9 MPa.
This specific SKU includes a SUS420J2 stainless steel rod for enhanced corrosion resistance and uses PT tapered port threads. The extruded aluminum barrel features sensor grooves on both sides, and because this is a -S model, it includes a magnet ready for CMSE reed or DMSE electronic solid-state switches.
Airtac SAIJ80 Adjustable Cylinder SAIJ80AX850-20S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80AX850-20S |
|---|---|
| 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 SAIJ80AX850-20S
| 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 SAIJ80AX850-20S Is Used
Long-Stroke Machining Clamp
Dials in the 830-850 mm clamping reach precisely during machine setup, absorbing part tolerances without adding external stop blocks.
Product Diverting Gate
Adjusts the retract end-stop on the fly to accommodate different package sizes on a single conveyor line.
Assembly Press Positioning
Fine-tunes the end-of-stroke position during commissioning to set exact pressing depths before locking down the setup.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX850-20S the Right Cylinder?
Choose this 80 mm bore when you need substantial thrust—4523 N at 0.9 MPa—and a highly adjustable end-stop. If your application requires less force, stepping down to a 63 mm bore yields 2805 N at 0.9 MPa. The adjustable rear screw is strictly a travel stop for fine-tuning the retract position without swapping cylinders; it does not hold the load without live air pressure. For load-holding without continuous air, consider an AirTAC SAIL or BSAI cylinder.
Because the 850 mm stroke is long and unsupported, an external guide is recommended to manage side loads. This SAIJ model is dimensionally interchangeable per ISO 15552 mounting interfaces and uses the reduced mounting set: 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 SAIJ80AX850-20S FAQ
At an operating pressure of 0.9 MPa, this 80 mm bore cylinder generates 4523 N of push force and 4071 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 effective travel from 850 mm down to as little as 830 mm. This provides a 20 mm tuning window for precise end-position alignment without changing the cylinder.
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