This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80AX125, 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 SI80AX125
The AirTAC SI80 Standard Air Cylinder SI80AX125 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 125mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80AX125, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke125 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80AX125
- 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 SI80AX125
The AirTAC SI80AX125 is a discontinued double-acting ISO 15552 profile cylinder with an 80mm bore and 125mm stroke. It delivers 2513 N push force at 0.5 MPa through a G3/8 port. The direct replacement is the SAI80AX125, which shares identical mounting, force, and port dimensions. This specific SKU features a SUS420J2 stainless steel rod (A suffix) but lacks a magnet, so it cannot accept legacy CS1-B/DS1-B sensors.
The SAI upgrade introduces a two Y-shaped one-way piston seal for lower start-up pressure and longer life. The SAI family also adds SAIL, SAIF, and BSAI lock variants absent in the SI line.
Airtac SI80 Standard Air Cylinder SI80AX125 Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80AX125 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80AX125 |
| Bore size | Ø80 mm |
| Stroke | 125 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 SAI80AX125 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 SAI80AX125 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 SI80AX125
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×125 | 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 SI80AX125 Is Used
Mid-Tonnage Pressing
Applies the 3518 N push force at 0.7 MPa for seating bearings, stamping light sheet metal, or clinching components in automated fixtures.
Stainless Rod Washdown
Leverages the SUS420J2 stainless piston rod for packaging and food-handling environments where moisture exposure would damage standard rods.
Replacing the Airtac SI80 Standard Air Cylinder SI80AX125 with the SAI80AX125
To replace the SI80AX125, order the SAI80AX125. Confirm the ISO 15552 mounting interface, 80mm bore, 125mm stroke, G3/8 port (PT/G/NPT thread options), and your specific mounting accessory (LB, FA, TC, etc.). Because this SKU has no -S suffix, it cannot support a magnetic sensor. If you need position feedback, select an SAI80X125S model and use current AirTAC switches. The SUS420J2 stainless rod provides corrosion resistance over standard carbon steel. If sizing alternatives, a 63mm bore yields 1559 N push at 0.5 MPa, while a 100mm bore yields 3927 N. Note that a plain cylinder drifts on air loss; the cushion only decelerates. For load holding, use an external pilot check valve or explore the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80AX125
- ✓ 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 SI80AX125 FAQ
Yes, the AirTAC SI80AX125 is discontinued. The direct replacement is the SAI80AX125. It is dimensionally interchangeable per ISO 15552, retaining the same 80mm bore, 125mm stroke, G3/8 port, and mounting interface to fit existing fixtures directly.
The bore is 80mm with a G3/8 air port. It generates 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 SAI80AX125
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80AX125 replacement — usually within 7-8 hours.