This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80AX70S, 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 SI80AX70S
The AirTAC SI80 Standard Air Cylinder SI80AX70S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 70mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80AX70S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke70 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80AX70S
- 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 SI80AX70S
The AirTAC SI80AX70S is a discontinued double-acting ISO 15552 profile cylinder with an 80mm bore, 70mm stroke, and an SUS420J2 stainless steel piston rod. Delivering 2513 N push force at 0.5 MPa through a G3/8 port, it features adjustable air cushions and a built-in magnet for legacy CS1-B/DS1-B sensors.
The direct replacement is the SAI80AX70S, matching the ISO 15552 mounting interface, bore, stroke, and output force. The SAI upgrades the piston seal to two Y-shaped one-way elements for lower start-up pressure and longer life.
Airtac SI80 Standard Air Cylinder SI80AX70S Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80AX70S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80AX70S |
| Bore size | Ø80 mm |
| Stroke | 70 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 SAI80AX70S 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 SAI80AX70S 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 SI80AX70S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×70 | 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 SI80AX70S Is Used
Stainless Rod Actuation
Ideal for packaging or washdown environments where the SUS420J2 stainless piston rod resists corrosion while providing 2513 N of push force.
Mid-Range Transfer
Handles product diverting and stopping on medium-duty conveyors with a 70mm stroke and adjustable end cushions for smooth deceleration.
Replacing the Airtac SI80 Standard Air Cylinder SI80AX70S with the SAI80AX70S
To replace the SI80AX70S, order the SAI80AX70S and confirm the ISO 15552 mounting interface, 80mm bore, 70mm stroke, G3/8 port, and your specific mounting accessory. The -S magnet enables CS1-B/DS1-B switches (the SAI uses current AirTAC switches), and the -A rod denotes SUS420J2 stainless steel. If you need to size up or down, neighboring bores (63mm or 100mm) alter the 0.5 MPa push force (1559 N or 3927 N respectively). Note that a plain cylinder drifts on air loss; the cushion only decelerates. For load holding, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80AX70S
- ✓ 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 SI80AX70S FAQ
Yes, the SI80AX70S is discontinued. The direct replacement is the SAI80AX70S. It is dimensionally interchangeable per ISO 15552, retaining the same 80mm bore, 70mm stroke, force, G3/8 port, and mounting fixtures.
The G3/8 port feeds a 25mm rod delivering 2513 N push and 2268 N pull at 0.5 MPa. At 0.7 MPa push is 3518 N, and 4523 N at 0.9 MPa. The theoretical maximum force is 513 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80AX70S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80AX70S replacement — usually within 7-8 hours.