This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X790S, 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 SI80X790S
The AirTAC SI80 Standard Air Cylinder SI80X790S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 790mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80X790S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke790 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80X790S
- 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 SI80X790S
The AirTAC SI80X790S is a discontinued double-acting ISO 15552 profile cylinder with a 790 mm stroke and 80 mm bore, delivering 2513 N of push force at 0.5 MPa. AirTAC replaced this unit with the SAI80X790S, a direct replacement retaining the exact ISO 15552 mounting interface, G3/8 port, and 2513 N output. The SAI family introduces an upgraded piston seal using two Y-shaped one-way elements for lower start-up pressure and longer life.
This -S model includes a piston magnet for legacy CS1-B/DS1-B sensors. The original SI line lacked integrated lock options, but the SAI family adds SAIL (air-released lock) and BSAI (clamp-lock) variants for load-holding needs.
Airtac SI80 Standard Air Cylinder SI80X790S Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X790S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X790S |
| Bore size | Ø80 mm |
| Stroke | 790 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 SAI80X790S 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 SAI80X790S 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 SI80X790S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×790 | 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 SI80X790S Is Used
Long-Stroke Diverters
Drives large sorting gates on material handling lines over a 790 mm travel distance, utilizing the 2513 N push force to move heavy pallets.
Large Assembly Presses
Actuates wide fixture clamps or press platens over extended lengths, relying on adjustable 36 mm air cushions to decelerate at stroke ends.
Replacing the Airtac SI80 Standard Air Cylinder SI80X790S with the SAI80X790S
To replace the SI80X790S, order the SAI80X790S and confirm the ISO 15552 mounting fixture, 80 mm bore, 790 mm stroke, G3/8 port, and M20x1.5 rod thread match. If downsizing, a 63 mm bore yields 1559 N push at 0.5 MPa; if upsizing, a 100 mm bore provides 3927 N. Because this is a 790 mm stroke, external guides are recommended to prevent rod bending under side loads. A plain cylinder drifts on air loss—the cushion only decelerates near stroke end—so use an external rod lock or pilot check valve for held loads, or specify the SAIL/BSAI lock variant. The -S suffix means a magnet is present for CS1-B/DS1-B switches.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X790S
- ✓ 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 SI80X790S FAQ
Yes, the SI80X790S is discontinued. The direct replacement is the AirTAC SAI80X790S. It shares the identical ISO 15552 mounting interface, 80 mm bore, 790 mm stroke, G3/8 port, and output force, fitting directly into existing fixtures.
The G3/8 port feeds a 25 mm piston rod. Force output is 2513 N push and 2268 N pull at 0.5 MPa, 3518 N push at 0.7 MPa, and a theoretical maximum of 513 kgf at 1.0 MPa. Operating speed is 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80X790S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X790S replacement — usually within 7-8 hours.