This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X720, with the same bore, stroke, output force, port and mounting, so it fits the same application. The SAI replacement keeps the same ISO 15552 mounting interface, bore, stroke, output force and accessories, so it drops straight into existing fixtures. It is the current-production version of this cylinder with an upgraded piston seal.
Airtac SI80 Standard Air Cylinder SI80X720
The AirTAC SI80 Standard Air Cylinder SI80X720 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 720mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80X720, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke720 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80X720
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac SI80 Standard Air Cylinder SI80X720
The AirTAC SI80X720 is a discontinued double-acting ISO 15552 profile cylinder with an 80 mm bore and 720 mm stroke. Delivering 2513 N push force at 0.5 MPa through a G3/8 port, it is directly replaced by the SAI80X720. This direct upgrade shares the exact ISO 15552 mounting interface, bore, stroke, and output force, fitting existing fixtures perfectly.
Because this specific SKU lacks the -S magnet, it cannot accept a position sensor. The SAI upgrade features a refined piston seal with two Y-shaped one-way elements for lower start-up pressure and longer life.
Airtac SI80 Standard Air Cylinder SI80X720 Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X720 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X720 |
| Bore size | Ø80 mm |
| Stroke | 720 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 standard stroke | Up to 1500 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The SAI80X720 carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / 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 | |
The SAI80X720 produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SI80 Standard Air Cylinder SI80X720
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×720 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Legacy SI-family variants: SID (double rod), SIJ (adjustable stroke) — each maps to its SAI equivalent (SID→SAID, SIJ→SAIJ). Rod material: carbon steel (blank) / SUS420J2 (A) / SUS304 (B).
Where the Airtac SI80 Standard Air Cylinder SI80X720 Is Used
Long-Stroke Diversion
Ideal for pushing heavy pallets across transfer lines where the 720 mm travel and 2513 N force at 0.5 MPa easily shift loads between adjacent conveyors.
Vertical Material Lift
Suitable for raising goods up to 128 kg in storage systems, provided an external guide prevents rod bending on this 720 mm stroke.
Heavy Press Ejection
Generates 3518 N at 0.7 MPa to eject dense parts from machining centers, using adjustable end cushions to decelerate the 25 mm rod safely.
Replacing the Airtac SI80 Standard Air Cylinder SI80X720 with the SAI80X720
To replace the SI80X720, order the SAI80X720, confirming the ISO 15552 interface, 80 mm bore, 720 mm stroke, G3/8 port, and M20x1.5 rod thread. This non-magnet SKU cannot hold a sensor; if sensing is needed, select an SAI model with the S suffix for current AirTAC switches. Sizing both ways: a 63 mm bore yields 1559 N push at 0.5 MPa, while a 100 mm bore yields 3927 N. Note that a plain cylinder drifts on air loss—the cushion only decelerates. For load holding, use an external pilot check valve, rod lock, or the SAIL/BSAI lock variants. Finally, at 720 mm, prevent rod bending by guiding the load externally to avoid side-load damage.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X720
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SI80 Standard Air Cylinder SI80X720 FAQ
Yes, the SI80X720 is discontinued. The direct replacement is the SAI80X720. It shares the same ISO 15552 mounting interface, 80 mm bore, 720 mm stroke, output force, and G3/8 port, fitting your existing fixtures perfectly.
The bore is 80 mm with a G3/8 port. Force output is 2513 N push and 2268 N pull at 0.5 MPa, 3518 N push at 0.7 MPa, 4523 N push at 0.9 MPa, and a theoretical max of 513 kgf at 1.0 MPa. Operating speed is 30-800 mm/s.
Request a Quote for the SAI80X720
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X720 replacement — usually within 7-8 hours.