Airtac SAIJ80 Adjustable Cylinder SAIJ80AX850-50S
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80AX850-50S 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 SAIJ80AX850-50S
The AirTAC SAIJ80X850-50-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, providing a usable travel window of 800 to 850 mm. It delivers a robust 4523N pull force at 0.9 MPa, making it suitable for heavy-duty positioning tasks. The barrel is extruded aluminum with sensor grooves on both sides, and this specific configuration features a SUS420J2 stainless steel rod and PT tapered ports.
A defining feature of this SKU is its external rear adjusting screw, which allows you to fine-tune the retract end position at commissioning without adding external stops. The adjuster acts purely as a travel stop and works alongside the standard 36mm variable air cushions at both ends to decelerate the load. For position holding without live air pressure, consider the SAIL or BSAI series instead.
Airtac SAIJ80 Adjustable Cylinder SAIJ80AX850-50S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80AX850-50S |
|---|---|
| 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 SAIJ80AX850-50S
| 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 SAIJ80AX850-50S Is Used
Variable End-Stop Machining
Dial in the exact 800 to 850mm retract position for machining jigs without swapping out the entire cylinder or adding external stop blocks to the fixture.
Product Changeover Lines
Quickly adjust the stroke length by up to 50mm during product size transitions on a packaging line, minimizing machine downtime between runs.
Long-Stroke Diverting
Drive heavy conveyor sorting arms over an 850mm span, using the rear screw to fine-tune the extended rest position based on belt width.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX850-50S the Right Cylinder?
Choose this 80mm bore cylinder when an application requires substantial thrust—such as the 4523N pull force at 0.9 MPa—over a long 850mm travel distance. If your force requirements are lower, stepping down to a 63mm bore yields a 2805N pull force at 0.9 MPa, while upgrading to a 100mm bore provides 7068N. The adjustable stroke is ideal for machine setups requiring variable end-stops during product changeover rather than relying on a fixed-stroke SAI cylinder.
Because the 850mm stroke is substantial, the 25mm diameter rod and M20x1.5 thread will experience side-loading forces; an external guide is recommended to prevent rod deflection over long unsupported spans. This model includes a magnet for CMSE reed and DMSE solid-state sensors. It uses the reduced SAIJ mounting set: Basic, FA, LB, TC, FTC, TCM1, and TCM2. It is dimensionally interchangeable with ISO 15552 cylinders.
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 SAIJ80AX850-50S FAQ
At 0.9 MPa, this 80mm bore cylinder generates a push force of 4523N and a pull force of 3681N. It can deliver a maximum push force of 513 kgf at 1.0 MPa.
The rear adjuster screw allows you to trim the effective stroke back by up to 50mm, creating a usable travel window of 800 to 850mm. It functions as a mechanical stop to fine-tune end positions and does not lock or hold the load without live air pressure.
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