This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80AX350S, 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 SI80AX350S
The AirTAC SI80 Standard Air Cylinder SI80AX350S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 350mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80AX350S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke350 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80AX350S
- 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 SI80AX350S
The AirTAC SI80AX350S is a discontinued double-acting ISO 15552 profile cylinder with an extruded aluminum barrel, adjustable air cushions at both ends, and a built-in piston magnet for position sensing. In this 80 mm bore class it delivers 2513 N push and 2268 N pull at 0.5 MPa, peaking at 513 kgf at 1.0 MPa. The direct replacement is the SAI80AX350S. It shares the same ISO 15552 mounting interface, 350 mm stroke, output force, G3/8 port, and M20x1.5 rod thread, fitting existing fixtures perfectly.
The SAI upgrade introduces a refined piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. Your SI80AX350S features the SUS420J2 stainless steel piston rod (the -A option) for corrosion resistance, and the -S magnet works with legacy CS1-B/DS1-B sensors. Note that a plain cylinder drifts on air loss; for load holding explore the SAIL or BSAI lock variants.
Airtac SI80 Standard Air Cylinder SI80AX350S Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80AX350S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80AX350S |
| Bore size | Ø80 mm |
| Stroke | 350 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 SAI80AX350S 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 SAI80AX350S 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 SI80AX350S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×350 | 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 SI80AX350S Is Used
Package Diversion
Drives heavy-duty diverter arms on packaging lines, utilizing the 2513 N push force at 0.5 MPa to reliably redirect loaded pallets without hesitation.
Press Ejection
Ejects formed metal or plastic components from machining centers, where the 350 mm stroke clears the work envelope and the SUS420J2 rod resists coolant corrosion.
Replacing the Airtac SI80 Standard Air Cylinder SI80AX350S with the SAI80AX350S
To replace the discontinued SI80AX350S, order the SAI80AX350S. Confirm the ISO 15552 mounting interface, the 80 mm bore, the 350 mm stroke, the G3/8 port, and your specific mounting accessory (LB, FA, TC, etc.). The -S magnet allows sensing, though you should upgrade from legacy CS1-B/DS1-B switches to current AirTAC sensors. The -A code specifies the SUS420J2 stainless rod; verify if you need this or the default carbon steel. When sizing both ways, neighboring bores (63 mm or 100 mm) offer different footprints, but this 80 mm bore provides 2513 N push at 0.5 MPa. Because the 350 mm stroke is long, prevent rod bending by ensuring external guides handle any side loads. A standard cylinder does not hold load without live air; the cushion only decelerates. For secure holding, use an external rod lock, a pilot check valve, or the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80AX350S
- ✓ 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 SI80AX350S FAQ
Yes, the AirTAC SI80AX350S is discontinued. The direct replacement is the SAI80AX350S. It is dimensionally interchangeable per ISO 15552, matching the 80 mm bore, 350 mm stroke, output force, G3/8 port, and mounting accessories, so it drops directly into existing fixtures.
The 80 mm bore features a G3/8 air port and an M20x1.5 rod thread. 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. Operating speed is 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80AX350S
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