Airtac SAIJ80 Adjustable Cylinder SAIJ80AX85-30
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80AX85-30 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 SAIJ80AX85-30
The AirTAC SAIJ80X85-30 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a usable travel window of 55 to 85 mm, allowing you to dial back the 85 mm nominal stroke by up to 30 mm during machine commissioning or product changeover. Delivering 2513 N of push force at 0.5 MPa, it handles substantial actuation tasks without needing external stops.
This variant is configured with a SUS420J2 stainless steel rod for improved corrosion resistance and features PT tapered port threads. The extruded aluminum barrel includes sensor grooves on both sides for flexible switch placement. Mounting options include the reduced SAIJ set of Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting the FB, CA, CB, and CR styles found on other variants.
Airtac SAIJ80 Adjustable Cylinder SAIJ80AX85-30 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80AX85-30 |
|---|---|
| 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 SAIJ80AX85-30
| 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 SAIJ80AX85-30 Is Used
End-Position Tuning
Dial in the exact 55 to 85 mm travel distance during machine commissioning to perfect a pressing or clamping motion without machining custom spacers.
Product Changeover
Quickly shorten the cylinder's effective stroke by up to 30 mm on a packaging line when switching to a slightly smaller product format.
Heavy Assembly Press
Leverage the 2513 N push force at 0.5 MPa to seat bearings or components, using the rear stopper to prevent over-travel and damage.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX85-30 the Right Cylinder?
Choose this 80 mm bore when your application requires heavy thrust that exceeds the 1374 N push force of a 50 mm cylinder, but does not warrant stepping up to a 100 mm bore that delivers 3927 N. The adjustable 55 to 85 mm travel window is ideal for setups requiring precise end-position tuning without physically swapping the cylinder for a shorter unit. The 25 mm rod and M20x1.5 thread provide robust load support, though any stroke of 300 mm or more on larger variants would require an external guide to manage side loads.
Remember that the rear adjuster functions strictly as a travel stop, not a lock, meaning the cylinder will not hold a load without live air pressure. For true load-holding requirements, consider the SAIL pneumatic lock series or an external rod lock. This SAIJ80X85-30 is dimensionally interchangeable per ISO 15552 standards and uses a PT port thread configuration without a magnet.
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 SAIJ80AX85-30 FAQ
At an operating pressure of 0.5 MPa, this 80 mm bore cylinder generates 2513 N of push force and 2268 N of pull force. At the maximum pressure of 1.0 MPa, the push force reaches 4523 N.
The rear adjuster screw acts as a mechanical stopper that can shorten the 85 mm nominal stroke by up to 30 mm, creating a usable travel window of 55 to 85 mm. It only sets the end position and does not lock the load without continuous air pressure.
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