This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X660, 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 SI80X660
The AirTAC SI80 Standard Air Cylinder SI80X660 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 SAI80X660, 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 → SAI80X660
- 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 SI80X660
The AirTAC SI80X660 is a discontinued double-acting ISO 15552 profile cylinder with an 80 mm bore and 660 mm stroke. Delivering 2513 N push force at 0.5 MPa via a G3/8 port, it is replaced by the SAI80X660. This direct successor shares the exact ISO 15552 mounting interface, bore, stroke, output force, and accessories. The SAI upgrade features a refined piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. As this SKU lacks the -S magnet, it cannot accept a position switch like the legacy CS1-B/DS1-B sensors.
The SAI family also introduces variants the original SI lacked, such as the SAIL air-released lock, SAIF integrated 4M valve, and BSAI clamp-lock. Note that a 660 mm stroke requires external guides to prevent rod bending under side loads.
Airtac SI80 Standard Air Cylinder SI80X660 Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X660 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X660 |
| 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 SAI80X660 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 SAI80X660 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 SI80X660
| 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 SI80X660 Is Used
Long-Stroke Material Transfer
Pushes heavy pallets or workpieces across conveyor lanes with 2513 N force at 0.5 MPa, requiring external guide rails to support the 660 mm stroke.
Heavy Pallet Positioning
Shifts loaded pallets or heavy fixtures into machining zones, utilizing the robust 80 mm bore and adjustable 36 mm air cushions to absorb impact.
Replacing the Airtac SI80 Standard Air Cylinder SI80X660 with the SAI80X660
To replace the SI80X660, order the SAI80X660. Verify your existing fixture matches the ISO 15552 mounting interface (LB, FA, CA, TC, etc.) and the G3/8 air port. Because this specific SKU has no -S suffix, it cannot support magnetic sensing; if position detection is needed, select an SAI80X660S and use current AirTAC switches. For force context, the 80 mm bore yields 2513 N push and 2268 N pull at 0.5 MPa; if lower force is acceptable, a 63 mm bore provides 1559 N push, while a 100 mm bore offers 3927 N. With a 660 mm stroke, use external guides to mitigate rod-bending and side-load risks. A plain cylinder does not hold load on air loss—the cushion only decelerates—so for suspended loads use the SAIL lock, BSAI clamp-lock, or an external pilot check valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X660
- ✓ 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 SI80X660 FAQ
Yes, the SI80X660 is discontinued. The direct replacement is the AirTAC SAI80X660. It is dimensionally interchangeable per ISO 15552, matching the 80 mm bore, 660 mm stroke, G3/8 port, and 2513 N output force, so it drops directly into existing fixtures.
The 80 mm bore uses a G3/8 port and a 25 mm rod. At 0.5 MPa it provides 2513 N push and 2268 N pull force. At 0.7 MPa push is 3518 N, and at 0.9 MPa it is 4523 N. The theoretical maximum force is 513 kgf at 1.0 MPa.
Request a Quote for the SAI80X660
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X660 replacement — usually within 7-8 hours.