This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X270SFB, 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 SI80X270SFB
The AirTAC SI80 Standard Air Cylinder SI80X270SFB is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 270mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80X270SFB, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke270 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80X270SFB
- 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 SI80X270SFB
The AirTAC SI80X270SFB is a discontinued double-acting ISO 15552 profile cylinder with a 270 mm stroke. Delivering 2513 N push force at 0.5 MPa through a G3/8 port, it is directly replaced by the SAI80X270SFB. This direct upgrade shares the exact bore, stroke, force, port and FB flange mounting interface.
The SAI replacement upgrades the piston seal to two Y-shaped one-way elements for low start-up pressure and long life. The SAI family also adds SAIL, SAIF and BSAI lock variants the SI lacked. Your -S code denotes a piston magnet for legacy CS1-B/DS1-B sensors.
Airtac SI80 Standard Air Cylinder SI80X270SFB Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X270SFB |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X270SFB |
| Bore size | Ø80 mm |
| Stroke | 270 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 SAI80X270SFB 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 SAI80X270SFB 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 SI80X270SFB
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×270 | 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 SI80X270SFB Is Used
Pallet Diversion
Actuates heavy lane diverters on packaging lines, using the 2513 N thrust to push loaded pallets firmly onto parallel conveyors.
Press Ejection
Ejects formed metal components from hydraulic presses, relying on the FB flange to withstand high shock loads during retraction.
Replacing the Airtac SI80 Standard Air Cylinder SI80X270SFB with the SAI80X270SFB
To replace this SI80X270SFB, order the SAI80X270SFB. Confirm the ISO 15552 interface, 80 mm bore, 270 mm stroke, G3/8 port and FB flange are retained. If you need more force, the neighbouring 100 mm bore yields 3927 N push at 0.5 MPa; if less is required, the 63 mm bore gives 1559 N. A plain cylinder drifts on air loss—the cushion only decelerates—so for load holding use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant. For this 270 mm stroke, ensure guide rails carry side loads to prevent rod bending.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X270SFB
- ✓ 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 SI80X270SFB FAQ
Yes, the SI80X270SFB is discontinued. The direct replacement is the SAI80X270SFB. It matches the ISO 15552 mounting dimensions, 80 mm bore, 270 mm stroke, output force, G3/8 port and FB flange, fitting existing fixtures perfectly.
It features a G3/8 air 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 force of 513 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80X270SFB
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X270SFB replacement — usually within 7-8 hours.