Airtac SAIJ80 Adjustable Cylinder SAIJ80BX85-30
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80BX85-30 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 SAIJ80BX85-30
The AirTAC SAIJ80X85-30 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, allowing you to dial back the 85 mm nominal travel to a precise 55-85 mm window. Delivering 2513 N of push force at 0.5 MPa, it handles demanding positioning tasks while remaining dimensionally interchangeable with standard ISO 15552 cylinders. The extruded aluminum barrel features sensor grooves on both sides for flexible switch placement.
This specific SKU features a SUS304 stainless steel rod for superior corrosion resistance and utilizes PT tapered port threads with a G3/8 connection. The rear adjustment screw acts purely as a mechanical stop to set the retract end position during commissioning; it does not lock the load, meaning live air is required to maintain position.
Airtac SAIJ80 Adjustable Cylinder SAIJ80BX85-30 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80BX85-30 |
|---|---|
| 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 SAIJ80BX85-30
| 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 SAIJ80BX85-30 Is Used
Product Changeover
Dial in the 55-85 mm travel window during format size changes on a packaging line without replacing the cylinder or adding external mechanical stops.
End-Position Tuning
Fine-tune the retract stroke during machine commissioning to perfectly seat a 2513 N press load, compensating for mechanical tolerance stack-up.
Corrosive Assembly
Leverage the SUS304 stainless steel rod for clamping tasks in washdown or mildly corrosive manufacturing environments where carbon steel would fail.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX85-30 the Right Cylinder?
Choose this 80 mm bore when an application requires more thrust than a 63 mm cylinder (which provides 1559 N push at 0.5 MPa) but has spatial constraints that prevent stepping up to a 100 mm bore. The adjustable 30 mm window is ideal for machine setups requiring variable end-stops or product changeovers, eliminating the need to physically swap out a fixed-stroke SAI cylinder. When integrating this model, ensure your mounting choice falls within the SAIJ subset: Basic, FA, LB, TC, FTC, TCM1, or TCM2, as FB, CA, CB, and CR configurations are not supported. Because the stroke is under 300 mm, side-load stress is minimal, though the robust 25 mm rod and M20x1.5 thread naturally accommodate higher off-center loads than smaller bores.
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 SAIJ80BX85-30 FAQ
At 0.5 MPa operating pressure, this 80 mm bore cylinder generates 2513 N of push force and 2268 N of pull force. It can reach a maximum push force of 4523 N at 0.9 MPa.
The rear adjuster acts as a mechanical stop that shortens the 85 mm nominal stroke by up to 30 mm, creating a usable 55-85 mm travel window. It only sets the end position and does not lock the load without live air pressure.
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