This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X720S, 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 SI80X720S
The AirTAC SI80 Standard Air Cylinder SI80X720S 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 SAI80X720S, 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 → SAI80X720S
- 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 SI80X720S
The AirTAC SI80X720S is a discontinued double-acting ISO 15552 profile cylinder with an 80 mm bore and 720 mm stroke. It delivers 2513 N push force at 0.5 MPa through a G3/8 port. The direct replacement is the SAI80X720S, matching the exact bore, stroke, force, port and ISO 15552 mounting interface for existing fixtures.
The SAI upgrade features a revised piston seal using two Y-shaped one-way elements for low start-up pressure and long life. This -S SKU includes a piston magnet for legacy CS1-B/DS1-B sensors; the SAI uses current AirTAC switches.
Airtac SI80 Standard Air Cylinder SI80X720S Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X720S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X720S |
| 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 SAI80X720S 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 SAI80X720S 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 SI80X720S
| 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 SI80X720S Is Used
Long-Stroke Diversion
Pushes heavy pallets laterally across transfer lines using the full 720 mm travel with 2513 N force at 0.5 MPa.
Vertical Material Lift
Raises 128 kg loads in order-picker stations, requiring external guides to manage rod side-load over the extended stroke.
Large Press Ejection
Clears bulky stamped parts from press beds, relying on the 36 mm adjustable air cushions to decelerate the 80 mm rod at high speeds.
Replacing the Airtac SI80 Standard Air Cylinder SI80X720S with the SAI80X720S
To replace the SI80X720S, order the SAI80X720S keeping the identical 80 mm bore, 720 mm stroke, M20x1.5 rod thread, G3/8 port and ISO 15552 mounting. Because the 720 mm stroke is long, use an external guide to prevent rod bending and side-load damage. Size both ways: a 63 mm bore yields 1559 N push at 0.5 MPa, while a 100 mm bore yields 3927 N. This plain cylinder drifts on air loss as the 36 mm cushion only decelerates; for load holding use an external pilot check valve or the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X720S
- ✓ 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 SI80X720S FAQ
Yes, the SI80X720S is discontinued. The direct replacement is the SAI80X720S. It shares the identical ISO 15552 mounting interface, 80 mm bore, 720 mm stroke, output force, and G3/8 port, fitting existing fixtures perfectly.
The G3/8 port feeds a 25 mm rod delivering 2513 N push and 2268 N pull at 0.5 MPa. At 0.7 MPa push is 3518 N, and 4523 N at 0.9 MPa. The theoretical maximum force is 513 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80X720S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X720S replacement — usually within 7-8 hours.