This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80AX290S, 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 SI80AX290S
The AirTAC SI80 Standard Air Cylinder SI80AX290S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 290mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80AX290S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke290 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80AX290S
- 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 SI80AX290S
The AirTAC SI80AX290S is a discontinued double-acting ISO 15552 profile cylinder with an extruded aluminum barrel, delivering 2513 N push and 2268 N pull at 0.5 MPa. It features a 25 mm SUS420J2 stainless piston rod (A option), M20x1.5 thread, G3/8 port, and a built-in magnet for CS1-B/DS1-B sensors. AirTAC replaced this EOL unit with the SAI80AX290S.
The SAI direct maintains the exact ISO 15552 mounting interface, 290 mm stroke, force, and port size. It upgrades the piston seal to two Y-shaped one-way elements for lower start-up pressure.
Airtac SI80 Standard Air Cylinder SI80AX290S Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80AX290S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80AX290S |
| Bore size | Ø80 mm |
| Stroke | 290 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 SAI80AX290S 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 SAI80AX290S 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 SI80AX290S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×290 | 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 SI80AX290S Is Used
Pallet Diversion
Actuates heavy lane diverters on packaging lines, utilizing the 2513 N push force to shift loaded pallets smoothly at 0.5 MPa.
Press Ejection
Drives ejection arms in stamping presses, where the 36 mm adjustable air cushions absorb kinetic energy at the 290 mm stroke end.
Replacing the Airtac SI80 Standard Air Cylinder SI80AX290S with the SAI80AX290S
To replace the SI80AX290S, order the SAI80AX290S. Confirm the ISO 15552 mounting fixture, 80 mm bore, 290 mm stroke, G3/8 port, and the -S magnet for current AirTAC switches. Sizing both ways: a 63 mm bore yields 1559 N push, while a 100 mm bore yields 3927 N at 0.5 MPa. For this 290 mm stroke, guide external rods to prevent side-load bending. A plain cylinder drifts on air loss; the cushion only decelerates. For load holding, use an external pilot check valve or the SAIL/BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80AX290S
- ✓ 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 SI80AX290S FAQ
Yes, the SI80AX290S is discontinued. The direct replacement is the SAI80AX290S. It shares the same ISO 15552 mounting interface, 80 mm bore, 290 mm stroke, output force, and G3/8 port, fitting existing fixtures perfectly.
The 80 mm bore uses a G3/8 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 SAI80AX290S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80AX290S replacement — usually within 7-8 hours.