Airtac SAIJ80 Adjustable Cylinder SAIJ80BX85-50
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80BX85-50 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 85mm 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
- Stroke85 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX85-50
The AirTAC SAIJ80X85-50 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, allowing you to fine-tune the end position during commissioning. With a nominal 85 mm stroke and a 50 mm adjustment range, it provides a usable travel window of 35-85 mm. This specific SKU features a SUS304 stainless steel rod and PT tapered ports, making it highly durable against washdown environments. In the 80 mm bore class, it delivers substantial thrust, offering 4523N of push force at 0.9 MPa.
The rear adjuster functions strictly as a mechanical stop to set the retract distance and cannot hold a load without live air pressure. Unlike fixed-stroke actuators, this adjustable design lets you dial in the exact travel limit without swapping the cylinder or adding external stops. It supports a reduced mounting set of Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting the FB, CA, CB, and CR options. The extruded aluminum barrel includes sensor grooves on both sides, ready for AirTAC CMSE reed and DMSE electronic switches if a magnet is added later.
Airtac SAIJ80 Adjustable Cylinder SAIJ80BX85-50 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80BX85-50 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 85 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 SAIJ80BX85-50
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×85 | 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 SAIJ80BX85-50 Is Used
Machine Changeover
Quickly reconfigure the retract end-stop during product size changes on a packaging line, utilizing the 35-85 mm travel window without replacing the cylinder.
Variable End Stops
Dial in the exact clamping position during machine commissioning using the 50 mm rear adjustment screw, avoiding the need for external mechanical stops.
Washdown Actuation
Deploy the SUS304 stainless steel rod in food or chemical processing environments where reliable 4523N push force and moisture resistance are required.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX85-50 the Right Cylinder?
Choose this 80 mm bore actuator when an application requires heavy pushing force combined with variable end-stop positioning. If you need slightly less thrust, stepping down to a 63 mm bore yields 2805N of push force at 0.9 MPa, whereas moving up to a 100 mm bore provides 7068N. The 25 mm rod diameter and M20x1.5 thread provide robust resistance to side loading, but because the 85 mm stroke is relatively short, an external guide is less critical here than on longer strokes.
An adjustable stroke is ideal for machine changeovers where product sizes vary, letting you set new retract limits on the fly. Remember that the rear adjuster and air cushions only decelerate the travel end; for true load-holding without live air pressure, you must integrate an external rod lock or select an AirTAC SAIL or BSAI cylinder. This ISO 15552 dimensionally interchangeable profile cylinder is configured with a PT tapered port and a SUS304 stainless steel rod for demanding environments.
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 SAIJ80BX85-50 FAQ
At 0.9 MPa, this 80 mm bore cylinder generates 4523N of push force and 2268N of pull force. It operates efficiently at speeds between 30 and 800 mm/s.
The rear adjuster acts as a mechanical stop that lets you shorten the effective stroke from the 85 mm nominal length down to 35 mm. It sets the travel end but does not lock or hold the load without continuous air pressure.
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