This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X290SN, 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 SI80X290SN
The AirTAC SI80 Standard Air Cylinder SI80X290SN 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 SAI80X290SN, 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 → SAI80X290SN
- 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 SI80X290SN
The AirTAC SI80X290SN is a discontinued double-acting ISO 15552 profile cylinder with an 80mm bore and 290mm stroke. It delivers 2513N push force at 0.5MPa via a G3/8 port. The direct replacement is the SAI80X290SN, retaining the exact interface, bore, stroke, force, port and mounting. The SAI upgrades the piston seal to two Y-shaped one-way elements for low start-up pressure and long life.
This legacy unit features a 25mm carbon steel rod, M20x1.5 thread, and 36mm adjustable cushions. The -S suffix indicates a piston magnet for CS1-B/DS1-B sensors, while -N denotes the NBR seal for -20 to +70C. The SAI family also introduces SAIL, SAIF and BSAI lock variants absent in the SI line. Note that a plain cylinder drifts on air loss; the cushion only decelerates.
Airtac SI80 Standard Air Cylinder SI80X290SN Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X290SN |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X290SN |
| 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 SAI80X290SN 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 SAI80X290SN 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 SI80X290SN
| 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 SI80X290SN Is Used
Pallet Diversion
Actuates diverter arms on packaging lines to route heavy pallets using the 2513N push force at 0.5MPa.
Press Ejection
Ejects formed metal parts from stamping presses, utilizing the 36mm adjustable cushions to brake the rod.
Replacing the Airtac SI80 Standard Air Cylinder SI80X290SN with the SAI80X290SN
To replace the SI80X290SN, order the SAI80X290SN. Confirm the ISO 15552 mounting interface, 80mm bore, 290mm stroke, G3/8 port, and -S magnet for current AirTAC switches. The -N NBR seal suits standard -20 to +70C temps, though Viton H extends this to 150C. Sizing both ways: a 63mm bore yields 1559N push at 0.5MPa, while a 100mm bore yields 3927N. For the 290mm stroke, use a guide to prevent rod bending and side loads. A plain SAI does not hold load without air; for holding, use the SAIL lock, BSAI clamp-lock, or external pilot check valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X290SN
- ✓ 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 SI80X290SN FAQ
Yes, the SI80X290SN is discontinued. The direct replacement is the SAI80X290SN. It is dimensionally interchangeable per ISO 15552, matching the 80mm bore, 290mm stroke, G3/8 port, and mounting fixtures.
The 80mm bore uses a G3/8 port. It generates 2513N push and 2268N pull at 0.5MPa, 3518N push at 0.7MPa, and a theoretical max of 513kgf at 1.0MPa. Speed is 30-800mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80X290SN
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X290SN replacement — usually within 7-8 hours.