This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X240SFB, 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 SI80X240SFB
The AirTAC SI80 Standard Air Cylinder SI80X240SFB 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 SAI80X240SFB, 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 → SAI80X240SFB
- 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 SI80X240SFB
The AirTAC SI80X240SFB is a discontinued double-acting ISO 15552 profile cylinder with an extruded aluminum barrel, 80 mm bore, 240 mm stroke, and an FB flange mount. Delivering 2513 N push and 2268 pull at 0.5 MPa via a G3/8 port, it is superseded by the SAI80X240SFB. This direct replacement matches the exact ISO 15552 mounting interface, bore, stroke, force, and port.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and long life. The -S suffix provides a piston magnet for CS1-B/DS1-B switches, while the SAI family adds SAIL, SAIF, and BSAI lock variants the SI lacked.
Airtac SI80 Standard Air Cylinder SI80X240SFB Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X240SFB |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X240SFB |
| 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 SAI80X240SFB 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 SAI80X240SFB 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 SI80X240SFB
| 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 SI80X240SFB Is Used
Press Fit Assembly
Drives bearings into housings on an automated line using 2513 N of push force at 0.5 MPa, relying on the 240 mm stroke to clear the workpiece.
Pallet Diverting
Actuates a diverting gate on a heavy-duty conveyor, utilizing the FB flange mount to handle lateral shifting loads during transit.
Replacing the Airtac SI80 Standard Air Cylinder SI80X240SFB with the SAI80X240SFB
To replace the SI80X240SFB, order the SAI80X240SFB and verify the ISO 15552 FB flange mount, 80 mm bore, 240 mm stroke, G3/8 port, and the -S magnet. If you need more force, the neighboring 100 mm bore yields 3927 N push at 0.5 MPa; for less, the 63 mm bore offers 1559 N. Note that a plain cylinder drifts on air loss since the 36 mm cushion only decelerates near stroke end. For load holding, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant. The 240 mm stroke is under the 300 mm threshold, so rod bending risks are minimal, but always guide the load.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X240SFB
- ✓ 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 SI80X240SFB FAQ
Yes, the SI80X240SFB is discontinued. The direct replacement is the SAI80X240SFB, which shares the same ISO 15552 mounting interface, 80 mm bore, 240 mm stroke, force, and G3/8 port.
It features a G3/8 port and provides 2513 N push / 2268 N pull at 0.5 MPa, 3518 N push at 0.7 MPa, 4523 N push at 0.9 MPa, and a theoretical max of 513 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80X240SFB
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X240SFB replacement — usually within 7-8 hours.