This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80AX400, 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 SI80AX400
The AirTAC SI80 Standard Air Cylinder SI80AX400 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 400mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80AX400, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke400 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80AX400
- 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 SI80AX400
The AirTAC SI80AX400 is a discontinued double-acting ISO 15552 profile cylinder featuring an 80mm bore and 400mm stroke. It delivers 2513N push force at 0.5MPa via a G3/8 port. AirTAC replaced this legacy unit with the SAI80AX400, a direct replacement retaining the exact same mounting interface, output force, and dimensions.
The SAI upgrade introduces a refined piston seal with two Y-shaped one-way elements for lower start-up pressure and extended life. This specific SKU includes a SUS420J2 stainless steel rod but lacks a magnet, meaning it cannot accept position sensors. For load holding, note that standard cylinders drift without live air; use an external rod lock or the SAIL/BSAI lock variants.
Airtac SI80 Standard Air Cylinder SI80AX400 Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80AX400 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80AX400 |
| Bore size | Ø80 mm |
| Stroke | 400 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 SAI80AX400 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 SAI80AX400 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 SI80AX400
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×400 | 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 SI80AX400 Is Used
Pallet Diversion
Shifts heavy pallets laterally across conveyor lines using the 2513N push force, while external guides absorb side loads over the 400mm travel.
Material Press
Provides steady downward clamping pressure for component seating, relying on a pilot check valve to prevent drift since the cushion only decelerates.
Heavy Gate Actuation
Opens and closes substantial industrial access doors where the SUS420J2 stainless rod offers necessary moisture resistance.
Replacing the Airtac SI80 Standard Air Cylinder SI80AX400 with the SAI80AX400
To replace the discontinued SI80AX400, order the SAI80AX400. Verify your ISO 15552 mounting interface, the 400mm stroke, and the G3/8 port. This unit uses an M20x1.5 rod thread and a SUS420J2 stainless rod. Because it lacks the -S magnet, it cannot support CS1-B or DS1-B switches; add the magnet if sensing is required. For sizing, the 80mm bore yields 2513N push at 0.5MPa; dropping to a 63mm bore gives 1559N, while an 100mm bore provides 3927N. The 400mm stroke requires external guides to prevent rod bending under side loads. Standard cushions only decelerate; they do not hold loads, so specify a pilot check valve or SAIL lock for drop prevention.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80AX400
- ✓ 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 SI80AX400 FAQ
Yes, the SI80AX400 is discontinued. The direct replacement is the SAI80AX400. It shares the identical ISO 15552 mounting interface, 80mm bore, 400mm stroke, G3/8 port, and output force, fitting directly into existing fixtures.
This double-acting cylinder uses a G3/8 air port. It generates 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 SAI80AX400
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80AX400 replacement — usually within 7-8 hours.