This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80AX180, 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 SI80AX180
The AirTAC SI80 Standard Air Cylinder SI80AX180 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 180mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80AX180, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke180 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80AX180
- 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 SI80AX180
The AirTAC SI80AX180 is a discontinued double-acting ISO 15552 profile cylinder with an 80mm bore and 180mm stroke. Delivering 2513N push force at 0.5MPa via a G3/8 port, it is replaced by the SAI80AX180. This direct successor matches the exact mounting interface, bore, stroke and output force.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. The SI80AX180 uses a SUS420J2 stainless rod (A suffix) and lacks a magnet, so it cannot take a sensor. SAIL and BSAI lock variants absent in the SI line are now available.
Airtac SI80 Standard Air Cylinder SI80AX180 Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80AX180 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80AX180 |
| Bore size | Ø80 mm |
| Stroke | 180 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 SAI80AX180 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 SAI80AX180 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 SI80AX180
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×180 | 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 SI80AX180 Is Used
Mid-Tonnage Pressing
Applies 2513N of thrust at 0.5MPa for seating bearings or light stamping tasks within automated machinery.
Package Diversion
Drives heavy-duty sorting gates or pushers on conveyor lines, utilizing the 180mm stroke to clear the belt.
Pallet Stops
Acts as a robust pneumatic stop for medium-weight pallets in material handling, handling up to 128kg vertical equivalents.
Replacing the Airtac SI80 Standard Air Cylinder SI80AX180 with the SAI80AX180
To replace the SI80AX180, order SAI80AX180 to match the ISO 15552 interface, 80mm bore, 180mm stroke, G3/8 port and M20x1.5 thread. Because this SKU lacks a magnet (-S), it cannot accept CS1-B/DS1-B sensors; choose an SAI80X180S if position sensing is needed. At 0.5MPa it yields 2513N push and 2268N pull; sizing down to a 63mm bore gives 1559N, while a 100mm bore offers 3927N. A plain cylinder drifts on air loss—the cushion only decelerates—so use a pilot check valve or SAIL/BSAI lock for held loads. The 180mm stroke is safe from rod-bending, but guide side loads for stability.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80AX180
- ✓ 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 SI80AX180 FAQ
Yes, the SI80AX180 is discontinued. The direct replacement is the SAI80AX180. It shares the identical ISO 15552 mounting interface, 80mm bore, 180mm stroke, output force, G3/8 port and accessories, fitting directly into existing fixtures.
It features a G3/8 air port. The thrust ratings are 2513N push and 2268N pull at 0.5MPa, 3518N push at 0.7MPa, 4523N push at 0.9MPa, and a maximum theoretical force of 513kgf at 1.0MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80AX180
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80AX180 replacement — usually within 7-8 hours.