This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X660S, 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 SI80X660S
The AirTAC SI80 Standard Air Cylinder SI80X660S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 660mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80X660S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke660 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80X660S
- 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 SI80X660S
The AirTAC SI80X660S is a discontinued double-acting ISO 15552 profile cylinder featuring an extruded aluminum barrel, a 660 mm stroke, and a built-in piston magnet. Delivering 2513 N of push force at 0.5 MPa through a G3/8 port, it is directly replaced by the SAI80X660S. This direct upgrade shares the exact same mounting interface, bore, and output force, fitting existing fixtures perfectly.
The SAI replacement introduces an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. The original SI -S SKU supports legacy CS1-B/DS1-B sensors, while the SAI family uses current AirTAC switches and adds SAIL, SAIF, and BSAI lock variants the SI lacked.
Airtac SI80 Standard Air Cylinder SI80X660S Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X660S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X660S |
| Bore size | Ø80 mm |
| Stroke | 660 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 SAI80X660S 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 SAI80X660S 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 SI80X660S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×660 | 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 SI80X660S Is Used
Long-Stroke Diversion
Drives large packages across wide conveyor belts using the 660 mm stroke and 2513 N push force at 0.5 MPa.
Pallet Handling
Positions heavy pallets on loading docks where the 128 kg vertical lift capacity and ISO 15552 mounting ensure stability.
Automated Assembly
Actuates multi-stage tooling fixtures, relying on the G3/8 port and adjustable 36 mm cushions for smooth end-of-stroke deceleration.
Replacing the Airtac SI80 Standard Air Cylinder SI80X660S with the SAI80X660S
To replace the SI80X660S, order the SAI80X660S and confirm the ISO 15552 mounting interface, 80 mm bore, 660 mm stroke, G3/8 port, and your specific mounting accessory (like TC trunnion or LB foot). Because the -S magnet is present, you can use legacy CS1-B/DS1-B switches, though the SAI accepts current AirTAC sensors. Sizing both ways: a neighboring 63 mm bore yields 1559 N push at 0.5 MPa, while a 100 mm bore offers 3927 N. Note that a plain cylinder drifts without live air; the cushion only decelerates. For load holding, use an external rod lock or pilot check valve, or specify the SAIL/BSAI lock variant. With a 660 mm stroke, use external guides to prevent rod bending and side-load damage.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X660S
- ✓ 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 SI80X660S FAQ
Yes, the SI80X660S is discontinued. The direct replacement is the SAI80X660S. It is dimensionally interchangeable per ISO 15552, keeping the same 80 mm bore, 660 mm stroke, output force, G3/8 port, and mounting interface.
This double-acting cylinder operates at 30-800 mm/s. It delivers 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 force of 513 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80X660S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X660S replacement — usually within 7-8 hours.