Airtac SAIJ80 Adjustable Cylinder SAIJ80AX70-40
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80AX70-40 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 SAIJ80AX70-40
The AirTAC SAIJ80X70-40 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 a robust 4523N of push force at 0.9 MPa, it handles heavy linear motion with precision. The barrel is extruded aluminum with sensor grooves on both sides, and this configuration features a SUS420J2 stainless steel rod and tapered PT ports.
The rear adjustment screw allows you to fine-tune the end position at commissioning without adding external stops. The adjuster functions purely as a travel stop to set deceleration, not as a lock, so it will not hold the load without live air. SAIJ supports a reduced mounting set of Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR.
Airtac SAIJ80 Adjustable Cylinder SAIJ80AX70-40 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80AX70-40 |
|---|---|
| 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 SAIJ80AX70-40
| 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 SAIJ80AX70-40 Is Used
Machine Changeover
Dial in the 30-70 mm travel window during product size changes without swapping the cylinder or adding external stopper blocks.
End-Position Tuning
Fine-tune the retract end position at commissioning to absorb mechanical tolerances and achieve exact placement.
Heavy Assembly Press
Leverage the 4523N push force at 0.9 MPa for pressing operations while trimming the stroke to prevent over-travel.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX70-40 the Right Cylinder?
Choose this 80mm bore if you need 2513N push at 0.5 MPa, stepping up from a 63mm bore that provides 1559N. The 40mm adjustment range is ideal for product changeovers where the exact end-stop varies, unlike a fixed-stroke SAI cylinder. For holding loads without live pressure, use an external rod lock or pilot-operated check valve, or look to the SAIL or BSAI series. To replace an ISO 15552 cylinder, match the 80mm bore, 70mm stroke, PT G3/8 ports, and the chosen mounting.
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 SAIJ80AX70-40 FAQ
At 0.9 MPa it provides 4523N of push force and 4071N of pull force, with a maximum thrust of 513 kgf at 1.0 MPa.
The rear adjuster screw lets you shorten the 70 mm nominal stroke by up to 40 mm, creating a 30-70 mm travel window. It acts as a stop, not a lock, so it cannot hold the load without live air.
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