This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80AX40S, 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 SI80AX40S
The AirTAC SI80 Standard Air Cylinder SI80AX40S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 40mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80AX40S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke40 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80AX40S
- 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 SI80AX40S
The AirTAC SI80AX40S is a discontinued double-acting ISO 15552 profile cylinder with an 80 mm bore, 40 mm stroke, and a SUS420J2 stainless steel rod. Generating 2513 N push force at 0.5 MPa, it uses a G3/8 air port and includes a piston magnet for CS1-B/DS1-B sensors. The direct replacement is the SAI80AX40S, matching the exact ISO 15552 mounting interface, bore, stroke, force, and porting.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and long life. The SAI family also adds SAIL, SAIF, and BSAI lock variants absent in the legacy line.
Airtac SI80 Standard Air Cylinder SI80AX40S Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80AX40S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80AX40S |
| Bore size | Ø80 mm |
| Stroke | 40 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 SAI80AX40S 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 SAI80AX40S 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 SI80AX40S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×40 | 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 SI80AX40S Is Used
Stainless Rod Clamping
Ideal for fixturing tasks requiring corrosion resistance, using the SUS420J2 rod to secure components with 2513 N of push force at 0.5 MPa.
Short-Stroke Diverting
The 40 mm stroke provides rapid actuation for diverting or sorting medium-weight packages on automated material handling lines.
Pallet Stopper Gate
Functions as a robust pneumatic stop in pallet flow systems, delivering reliable physical barriers under standard operating pressures.
Replacing the Airtac SI80 Standard Air Cylinder SI80AX40S with the SAI80AX40S
To replace the SI80AX40S, order the SAI80AX40S keeping the identical ISO 15552 mounting interface, 80 mm bore, 40 mm stroke, G3/8 port, and -S magnet. If downsizing, a 63 mm bore yields 1559 N push at 0.5 MPa; if upsizing, a 100 mm bore provides 3927 N. This plain cylinder does not hold load without live air—the cushion only decelerates—so use an external rod lock or pilot check valve for hold, or step up to the SAIL or BSAI lock variant. The -A rod is SUS420J2 stainless steel, and the -S magnet supports legacy CS1-B/DS1-B switches (the SAI uses current AirTAC switches).
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80AX40S
- ✓ 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 SI80AX40S FAQ
Yes, the SI80AX40S is discontinued. The direct replacement is the SAI80AX40S. It is dimensionally interchangeable per the ISO 15552 mounting interface, maintaining the same 80 mm bore, 40 mm stroke, output force, and G3/8 port size to fit existing fixtures.
This double-acting cylinder has a G3/8 air port. It delivers 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 force of 513 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80AX40S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80AX40S replacement — usually within 7-8 hours.