This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X1150S, 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 SI80X1150S
The AirTAC SI80 Standard Air Cylinder SI80X1150S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 1150mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80X1150S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke1150 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80X1150S
- 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 SI80X1150S
The AirTAC SI80X1150S is a discontinued double-acting ISO 15552 profile cylinder with a 1150 mm stroke. Delivering 2513 N push force at 0.5 MPa, it features a Ø25 mm rod, M20x1.5 thread, and a G3/8 air port. AirTAC replaced this legacy unit with the SAI80X1150S, a direct replacement matching the exact ISO 15552 mounting interface, bore, stroke, output force, and port size.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and extended life. The SAI family also adds SAIL, SAIF, and BSAI lock variants the SI lacked. The -S suffix denotes a piston magnet for legacy CS1-B/DS1-B sensors.
Airtac SI80 Standard Air Cylinder SI80X1150S Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X1150S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X1150S |
| Bore size | Ø80 mm |
| Stroke | 1150 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 SAI80X1150S 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 SAI80X1150S 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 SI80X1150S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×1150 | 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 SI80X1150S Is Used
Long-Stroke Diversion
Pushes heavy pallets across 1150 mm transfer lines using 2513 N of thrust at 0.5 MPa.
Vertical Material Lift
Raises 128 kg loads in two-to-one margin vertical lift stations, requiring external guides for stability.
Large Fixture Actuation
Drives oversized clamping fixtures on machining centers where a G3/8 port and 80 mm bore are standard.
Replacing the Airtac SI80 Standard Air Cylinder SI80X1150S with the SAI80X1150S
To replace the SI80X1150S, order the SAI80X1150S. Verify the ISO 15552 mounting interface, 1150 mm stroke, G3/8 port, and your mounting accessory (LB, FA, TC, etc.). The -S magnet means it accepts CS1-B/DS1-B switches, though the SAI replacement uses current AirTAC sensors. Sizing both ways: the 80 mm bore yields 2513 N push at 0.5 MPa; dropping to a 63 mm bore gives 1559 N, while an 80 mm at 0.7 MPa yields 3518 N. Because this is a 1150 mm stroke, prevent rod bending by using an external guide to manage side loads. A plain cylinder drifts on air loss—the cushion only decelerates—so use the SAIL or BSAI lock variant, or a pilot check valve, to hold loads safely.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X1150S
- ✓ 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 SI80X1150S FAQ
Yes, the SI80X1150S is discontinued. The direct replacement is the AirTAC SAI80X1150S. It matches the ISO 15552 mounting interface, 80 mm bore, 1150 mm stroke, output force, and G3/8 port, fitting existing fixtures perfectly.
The 80 mm bore provides 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. It uses a G3/8 port and a Ø25 mm rod.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80X1150S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X1150S replacement — usually within 7-8 hours.