This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X290S, 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 SI80X290S
The AirTAC SI80 Standard Air Cylinder SI80X290S 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 SAI80X290S, 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 → SAI80X290S
- 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 SI80X290S
The AirTAC SI80X290S is a discontinued double-acting ISO 15552 profile cylinder with an extruded aluminum barrel, adjustable air cushions, and a built-in piston magnet for CS1-B/DS1-B switches. Delivering 2513 N push force at 0.5 MPa through its G3/8 port, it is replaced by the SAI80X290S. This direct upgrade shares the exact same 80 mm bore, 290 mm stroke, output force, and ISO 15552 mounting interface.
The SAI replacement features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and long life. The SAI family also introduces SAIL, SAIF, and BSAI lock variants the SI lacked, and offers Viton H seals for high-temperature duties.
Airtac SI80 Standard Air Cylinder SI80X290S Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X290S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X290S |
| 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 SAI80X290S 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 SAI80X290S 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 SI80X290S
| 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 SI80X290S Is Used
Pallet Diversion
Actuates heavy diverter arms on packaging lines, using the 2513 N push force to redirect loaded pallets reliably without rebound.
Material Lift Gate
Raises and lowers tiered lift gates in automated storage systems, safely handling the 128 kg vertical load capacity with smooth end-cushioning.
Press Ejection
Drives robust ejection pins in machining centers to clear metal blanks, benefiting from the 290 mm stroke to clear the work zone fully.
Replacing the Airtac SI80 Standard Air Cylinder SI80X290S with the SAI80X290S
To replace the SI80X290S, order the SAI80X290S. Confirm the ISO 15552 mounting interface, the 80 mm bore, the 290 mm stroke, the G3/8 port, and the -S magnet for current AirTAC switches. If you need more force, the neighboring 100 mm bore provides 3927 N push at 0.5 MPa; if less is required, the 63 mm bore offers 1559 N. Note that a plain cylinder drifts on air loss—the cushion only decelerates—so use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant for held loads. At 290 mm stroke, ensure adequate guidance to prevent rod bending and side-load wear.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X290S
- ✓ 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 SI80X290S FAQ
Yes, the SI80X290S is discontinued. The direct replacement is the SAI80X290S. It shares the identical ISO 15552 mounting interface, 80 mm bore, 290 mm stroke, output force, and G3/8 port, fitting existing fixtures perfectly.
This double-acting cylinder has a G3/8 port and provides 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 SAI80X290S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X290S replacement — usually within 7-8 hours.