Airtac SAIJ80 Adjustable Cylinder SAIJ80BX70-40S
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80BX70-40S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 70mm 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
- Stroke70 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX70-40S
The AirTAC SAIJ80X70-40-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that creates a 30-70 mm usable travel window from its 70 mm nominal stroke. Delivering 2513 N of push force at 0.5 MPa, it is built with a SUS304 stainless steel rod for superior corrosion resistance and operates at 30-800 mm/s. The extruded aluminum barrel includes sensor grooves on both sides, and the integrated magnet makes it fully compatible with AirTAC CMSE reed and DMSE electronic solid-state switches.
Because the rear screw acts as a mechanical stop rather than a lock, it allows precise end-position tuning during commissioning without adding external stops, though it cannot hold the load without live air. This model uses PT tapered ports and supports a specific mounting subset including Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR options.
Airtac SAIJ80 Adjustable Cylinder SAIJ80BX70-40S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80BX70-40S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 70 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 SAIJ80BX70-40S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×70 | 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 SAIJ80BX70-40S Is Used
Machine Changeover
Dial in the exact 30-70 mm end-position during product size transitions without swapping out the entire cylinder assembly.
Variable End Stops
Use the rear adjuster to fine-tune the retract stroke on automated tooling, ensuring precise positioning without external mechanical stops.
Corrosive Environments
Leverage the SUS304 stainless steel rod for pneumatic clamping or positioning tasks in washdown or mildly corrosive industrial settings.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX70-40S the Right Cylinder?
Choose this 80 mm bore when you need higher thrust than a 63 mm cylinder (which provides 1559 N push at 0.5 MPa) but want to avoid the larger footprint of a 100 mm unit. The adjustable stroke is ideal for machine setups requiring variable end-stops or frequent product-size changeovers, functioning as a travel stop that must not be confused with a load-holding lock. For applications requiring the rod to stay fixed without continuous air pressure, consider an AirTAC SAIL or BSAI cylinder instead. To match this ISO 15552 interchangeable replacement, specify the 80 mm bore, 70 mm stroke, 40 mm adjustment, PT ports, SUS304 rod, and the -S 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 SAIJ80BX70-40S 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 screw allows you to shorten the effective travel by up to 40 mm. This creates a usable stroke window of 30 to 70 mm, enabling fine-tuning of the end position during commissioning without replacing the cylinder.
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