This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X740S, 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 SI80X740S
The AirTAC SI80 Standard Air Cylinder SI80X740S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 740mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80X740S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke740 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80X740S
- 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 SI80X740S
The AirTAC SI80X740S is a discontinued double-acting ISO 15552 profile cylinder with a 740 mm stroke and a G3/8 port. Delivering 2513 N of push force at 0.5 MPa, it is replaced by the SAI80X740S. This direct successor matches the exact bore, stroke, force, port and ISO 15552 mounting interface, dropping directly into existing fixtures.
The SAI upgrade features a new piston seal with two Y-shaped one-way elements for low start-up pressure and long life. The -S magnet supports legacy CS1-B/DS1-B sensors, while the SAI family adds SAIL lock and BSAI clamp-lock variants the SI lacked.
Airtac SI80 Standard Air Cylinder SI80X740S Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X740S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X740S |
| Bore size | Ø80 mm |
| Stroke | 740 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 SAI80X740S 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 SAI80X740S 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 SI80X740S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×740 | 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 SI80X740S Is Used
Long-Stroke Diversion
Pushes heavy pallets across transfer lines using the 740 mm stroke and 2513 N force, requiring external guides to prevent rod bending.
Elevated Gate Actuation
Actuates large loading dock gates over the 740 mm travel, relying on the G3/8 port and ISO 15552 mounting for rigid fixture support.
Replacing the Airtac SI80 Standard Air Cylinder SI80X740S with the SAI80X740S
To replace the SI80X740S, order the SAI80X740S. Confirm the ISO 15552 mounting interface, 80 mm bore, 740 mm stroke, G3/8 port, and mounting accessory. The -S suffix means a piston magnet for CS1-B/DS1-B switches; the SAI replacement uses current AirTAC switches. If sizing down, a 63 mm bore yields 1559 N push at 0.5 MPa; sizing up to 100 mm provides 3927 N. A plain cylinder drifts on air loss as the cushion only decelerates, so use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant for load holding. With a 740 mm stroke, use external guides to prevent rod bending and side loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X740S
- ✓ 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 SI80X740S FAQ
Yes, the SI80X740S is discontinued. The direct replacement is the SAI80X740S. It is dimensionally interchangeable per ISO 15552, maintaining the same 80 mm bore, 740 mm stroke, 2513 N force, G3/8 port and mounting interface.
It features a G3/8 air 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 maximum of 513 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80X740S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X740S replacement — usually within 7-8 hours.