This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80AX290, 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 SI80AX290
The AirTAC SI80 Standard Air Cylinder SI80AX290 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 SAI80AX290, 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 → SAI80AX290
- 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 SI80AX290
The AirTAC SI80AX290 is a discontinued double-acting ISO 15552 profile cylinder with an 80 mm bore and 290 mm stroke. It delivers 2513 N push force at 0.5 MPa via a G3/8 port. The direct replacement is the SAI80AX290, matching the interface, force, and stroke.
This SKU features a SUS420J2 stainless steel rod but lacks a magnet, so it cannot accept position switches. The SAI upgrade uses two Y-shaped piston seals for low start-up pressure. For loads, expect a safe working limit around 1508 N or a 128 kg vertical lift. Note the cushion only decelerates; use a SAIL lock or external check valve to hold loads.
Airtac SI80 Standard Air Cylinder SI80AX290 Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80AX290 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80AX290 |
| 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 SAI80AX290 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 SAI80AX290 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 SI80AX290
| 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 SI80AX290 Is Used
Mid-Tonnage Pressing
Applies 2513 N of push force at 0.5 MPa for seating bearings or light stamping tasks in automated machinery.
Pallet Diversion
Drives a 290 mm stroke diverter arm to redirect heavy pallets on a packaging line without needing a sensor.
Vertical Lift Gates
Raises material handling gates; use an external pilot check valve since the standard cushion only decelerates.
Replacing the Airtac SI80 Standard Air Cylinder SI80AX290 with the SAI80AX290
To replace the SI80AX290, order the SAI80AX290. Verify the ISO 15552 mounting dimensions, the G3/8 port, and your specific mounting accessory (LB, FA, TC, etc.). Because this is an -A variant, confirm the SAI also uses the SUS420J2 stainless rod. Since there is no -S magnet, this cylinder cannot support sensors; if sensing is needed, add an external mechanical switch.
For sizing, the neighbouring 63 mm bore yields 1559 N push at 0.5 MPa, while the 100 mm bore yields 3927 N. A plain cylinder drifts on air loss—the cushion only decelerates—so for load holding, select the SAIL lock variant or use an external pilot check valve. At 290 mm stroke, ensure guide rails carry side loads to prevent rod bending.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80AX290
- ✓ 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 SI80AX290 FAQ
Yes, the SI80AX290 is discontinued. The direct replacement is the SAI80AX290. It is dimensionally interchangeable per ISO 15552, retaining the same 80 mm bore, 290 mm stroke, G3/8 port, and mounting interface.
This double-acting cylinder 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, and 4523 N push at 0.9 MPa. The theoretical maximum force is 513 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80AX290
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80AX290 replacement — usually within 7-8 hours.