This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X240S, 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 SI80X240S
The AirTAC SI80 Standard Air Cylinder SI80X240S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 240mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80X240S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke240 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80X240S
- 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 SI80X240S
The AirTAC SI80X240S is a discontinued double-acting ISO 15552 profile cylinder with an 80mm bore and 240mm stroke. Delivering 2513N push force at 0.5MPa via a G3/8 port, it is replaced by the SAI80X240S. This direct upgrade shares identical mounting, output, and dimensions, fitting existing fixtures perfectly.
The SAI features upgraded two Y-shaped one-way piston seals for low start-up pressure. The SAI family adds SAIL, SAIF, and BSAI lock variants the SI lacked. Your -S magnet works with legacy CS1-B/DS1-B switches, while the SAI uses current AirTAC sensors.
Airtac SI80 Standard Air Cylinder SI80X240S Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X240S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X240S |
| Bore size | Ø80 mm |
| Stroke | 240 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 SAI80X240S 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 SAI80X240S 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 SI80X240S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×240 | 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 SI80X240S Is Used
Pressing and Forming
Drives mid-tonnage pressing tasks, utilizing the 2513N push force at 0.5MPa to seat bearings or form light sheet metal components reliably.
Package Diverting
Actuates heavy-duty diverters on conveyor lines, where the 240mm stroke provides ample travel to redirect large pallets or bulk totes.
Vertical Lift Gates
Raises and lowers material handling gates. The 80mm bore handles the deadweight, while the magnet enables position confirmation.
Replacing the Airtac SI80 Standard Air Cylinder SI80X240S with the SAI80X240S
To replace the SI80X240S, order the SAI80X240S. Verify the ISO 15552 mounting interface, 80mm bore, 240mm stroke, M20x1.5 rod thread, G3/8 port, and -S magnet. Sizing both ways: a 63mm bore yields 1559N [email protected], while a 100mm bore yields 3927N. Note that a plain cylinder drifts on air loss; the cushion only decelerates. For load holding, use the SAIL or BSAI lock variant, or an external pilot check valve. Stroke is under 300mm, so side-load rod-bending is minimal, but guides are still advised for heavy lateral loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X240S
- ✓ 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 SI80X240S FAQ
Yes, the SI80X240S is discontinued. The direct replacement is the SAI80X240S. It shares the same ISO 15552 mounting interface, 80mm bore, 240mm stroke, output force, and G3/8 port, fitting existing fixtures perfectly without modifications.
The 80mm bore delivers 2513N push and 2268N pull at 0.5MPa, 3518N push at 0.7MPa, and a theoretical max of 513kgf at 1.0MPa. Operating speed is 30-800mm/s. It features a 25mm rod, M20x1.5 thread, and 36mm adjustable cushions.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80X240S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X240S replacement — usually within 7-8 hours.