This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80AX225S, 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 SI80AX225S
The AirTAC SI80 Standard Air Cylinder SI80AX225S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 225mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80AX225S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke225 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80AX225S
- 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 SI80AX225S
The AirTAC SI80AX225S is a discontinued double-acting ISO 15552 profile cylinder featuring an extruded aluminum barrel, a SUS420J2 stainless piston rod (-A), a built-in magnet (-S), and an adjustable air cushion (36 mm) at both ends. It delivers 2513 N push and 2268 N pull at 0.5 MPa, utilizing a G3/8 air port. The direct replacement is the SAI80AX225S, which maintains the same ISO 15552 mounting interface, bore, stroke, force, and port size for a seamless fixture upgrade.
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 original -S magnet supports legacy CS1-B/DS1-B sensors, while a plain cylinder drifts on air loss as the cushion only decelerates.
Airtac SI80 Standard Air Cylinder SI80AX225S Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80AX225S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80AX225S |
| Bore size | Ø80 mm |
| Stroke | 225 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 SAI80AX225S 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 SAI80AX225S 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 SI80AX225S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×225 | 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 SI80AX225S Is Used
Stainless Rod Actuation
Leverages the SUS420J2 rod for corrosion resistance in washdown or mildly chemical manufacturing environments requiring 2513 N push force.
Pallet Diverting
Handles heavy pallet redirection in distribution centers, utilizing the 225 mm stroke and 128 kg safe vertical lift margin.
Press Ejection
Ejects formed parts from industrial presses, benefiting from the 36 mm adjustable air cushions to decelerate the 80 mm bore at stroke ends.
Replacing the Airtac SI80 Standard Air Cylinder SI80AX225S with the SAI80AX225S
To replace the SI80AX225S, order the SAI80AX225S. Confirm the ISO 15552 mounting interface, 80 mm bore, 225 mm stroke, G3/8 port (PT/G/NPT thread), and mounting accessory match your fixture. The -S magnet enables CS1-B/DS1-B switches (the SAI uses current AirTAC switches), and the -A rod is SUS420J2 stainless. To size both ways: neighboring bores are 63 mm (1559 N push @0.5 MPa) and 100 mm (3927 N push @0.5 MPa); the 80 mm bore yields 3518 N push @0.7 MPa. Because 225 mm exceeds the 80 mm bore standard stroke increments, it is a nonstandard stroke and requires attention to side-load and rod-bending forces—use guide rails to prevent binding. A plain cylinder does not hold load without live air; for load holding use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80AX225S
- ✓ 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 SI80AX225S FAQ
Yes, the SI80AX225S is discontinued. The direct replacement is the SAI80AX225S. It is dimensionally interchangeable per ISO 15552, retaining the same 80 mm bore, 225 mm stroke, 513 kgf max force, G3/8 port, and mounting interface.
The 80 mm bore uses a G3/8 port. Force ratings are: 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.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80AX225S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80AX225S replacement — usually within 7-8 hours.