This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80AX120S, 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 SI80AX120S
The AirTAC SI80 Standard Air Cylinder SI80AX120S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 120mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80AX120S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke120 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80AX120S
- 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 SI80AX120S
The AirTAC SI80AX120S is a discontinued double-acting ISO 15552 profile cylinder with a 120 mm stroke and an SUS420J2 stainless steel piston rod. It delivers 2513 N of push force at 0.5 MPa through its G3/8 port. AirTAC replaced this legacy unit with the SAI80AX120S, a direct upgrade sharing the exact ISO 15552 mounting interface, bore, and output force.
The SAI replacement features an upgraded piston seal using two Y-shaped one-way elements for low start-up pressure and extended life. This -S variant includes a piston magnet for legacy CS1-B/DS1-B sensors, while the SAI family also introduces SAIL and BSAI lock variants absent from the SI line.
Airtac SI80 Standard Air Cylinder SI80AX120S Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80AX120S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80AX120S |
| Bore size | Ø80 mm |
| Stroke | 120 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 SAI80AX120S 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 SAI80AX120S 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 SI80AX120S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×120 | 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 SI80AX120S Is Used
Heavy-Duty Clamping
Secures large metal castings during CNC machining, utilizing the 2513 N push force at 0.5 MPa to prevent workpiece shifting under high cutting loads.
Pallet Diverting
Actuates diverting arms on heavy-material conveyor lines, where the 120 mm stroke provides the precise reach needed to redirect wide pallets.
Replacing the Airtac SI80 Standard Air Cylinder SI80AX120S with the SAI80AX120S
To replace the SI80AX120S, order the SAI80AX120S. Confirm the ISO 15552 mounting interface, the 80 mm bore, 120 mm stroke, G3/8 port, and your specific mounting accessory. Because this unit uses the -A rod option, verify you need the SUS420J2 stainless steel rod over the standard carbon steel. The -S suffix means a magnet is present for CS1-B/DS1-B switches; the SAI replacement uses current AirTAC switches. If sizing down, a 63 mm bore yields 1559 N push at 0.5 MPa; if sizing up, a 100 mm bore provides 3927 N. A plain cylinder drifts on air loss, so for load holding use an external rod lock or pilot check valve, or select the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80AX120S
- ✓ 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 SI80AX120S FAQ
Yes, the SI80AX120S is discontinued. The direct replacement is the SAI80AX120S. It shares the same ISO 15552 mounting interface, 80 mm bore, 120 mm stroke, G3/8 port, and output force, fitting directly into existing fixtures.
The G3/8 port feeds a 25 mm piston rod. 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.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80AX120S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80AX120S replacement — usually within 7-8 hours.