Airtac SAIJ80 Adjustable Cylinder SAIJ80BX85-40
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80BX85-40 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 SAIJ80BX85-40
The AirTAC SAIJ80X85-40 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a usable travel window of 45 to 85 mm, allowing you to dial in the exact retract distance during commissioning without swapping hardware. Equipped with a SUS304 stainless steel rod, it delivers 2513 N of push force at 0.5 MPa while resisting corrosion.
This model uses PT tapered port threads (G3/8) and includes variable air cushions at both ends to manage kinetic energy. The rear adjustment screw acts purely as a mechanical stop for end-position tuning, meaning it will not hold a load safely without continuous live air pressure.
Airtac SAIJ80 Adjustable Cylinder SAIJ80BX85-40 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80BX85-40 |
|---|---|
| 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 SAIJ80BX85-40
| 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 SAIJ80BX85-40 Is Used
Product Changeovers
Quickly reconfigure the 45-85 mm retract distance on packaging lines when switching to different container sizes without changing the cylinder.
End-Stop Calibration
Fine-tune the final resting position of a tooling head during machine setup to avoid crushing delicate components.
Variable Positioning
Provide a mechanical adjustment point on automated assembly stations where multiple parts require slightly different retraction depths.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX85-40 the Right Cylinder?
Choose this 80 mm bore when an application requires substantial thrust, such as the 2513 N push force at 0.5 MPa, but still needs precise end-position flexibility. If your setup demands less force, stepping down to a 63 mm bore yields 1559 N of push force. Conversely, if you need higher capacity, a 100 mm bore provides 3927 N. The adjustable 45-85 mm window is ideal for product changeovers, whereas a fixed-stroke SAI cylinder is better for rigid, unvarying stops.
Because this is an 85 mm stroke unit, side-load risks are minimal, but always ensure the load is guided to prevent rod binding. For load-holding without air pressure, this cylinder is insufficient; you should explore an AirTAC SAIL or BSAI locking cylinder instead. It supports a reduced mounting set of Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR options.
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 SAIJ80BX85-40 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 adjuster acts as a mechanical stop that lets you shorten the nominal 85 mm stroke by up to 40 mm, creating a usable travel window of 45 to 85 mm. It only sets the end position and does not lock the load without live air.
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