This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X350SFTC, 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 SI80X350SFTC
The AirTAC SI80 Standard Air Cylinder SI80X350SFTC is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 350mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80X350SFTC, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke350 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80X350SFTC
- 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 SI80X350SFTC
The AirTAC SI80X350SFTC is a discontinued double-acting ISO 15552 profile cylinder with a 350 mm stroke. Delivering 2513 N push force at 0.5 MPa through a G3/8 port, it is replaced by the SAI80X350SFTC. This direct upgrade shares identical mounting, bore, and output, fitting existing FTC trunnion fixtures perfectly.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure. The SAI family also adds SAIL and BSAI lock variants the SI lacked. Your -S code means a magnet for CS1-B/DS1-B sensors.
Airtac SI80 Standard Air Cylinder SI80X350SFTC Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X350SFTC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X350SFTC |
| Bore size | Ø80 mm |
| Stroke | 350 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 SAI80X350SFTC 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 SAI80X350SFTC 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 SI80X350SFTC
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×350 | 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 SI80X350SFTC Is Used
Pallet Diversion
Pushes heavy pallets sideways onto parallel conveyor lines using the 2513 N push force at 0.5 MPa, with the 350 mm stroke clearing the main transport lane.
Stack Discharge
Ejects completed cardboard stacks from a palletizer station, utilizing the FTC trunnion mount to handle the lateral stress of the 350 mm extension.
Press Ejection
Kicks stamped metal parts out of a hydraulic press bed, where the adjustable 36 mm air cushions absorb the kinetic energy at stroke ends.
Replacing the Airtac SI80 Standard Air Cylinder SI80X350SFTC with the SAI80X350SFTC
To replace the SI80X350SFTC, order the SAI80X350SFTC. Confirm the ISO 15552 interface, 80 mm bore, 350 mm stroke, G3/8 port, FTC trunnion mount, and -S magnet. If you need less force, a 63 mm bore gives 1559 N push; for more, a 100 mm bore yields 3927 N. A plain cylinder drifts on air loss—the cushion only decelerates—so use a pilot check valve or SAIL lock for holding. At 350 mm, use an external guide to prevent rod bending. The SAI uses current switches; the SI uses CS1-B/DS1-B.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X350SFTC
- ✓ 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 SI80X350SFTC FAQ
Yes, the SI80X350SFTC is discontinued. The direct replacement is the SAI80X350SFTC. It is dimensionally interchangeable per the ISO 15552 mounting interface, retaining the same 80 mm bore, 350 mm stroke, G3/8 port, and FTC trunnion mount.
This double-acting cylinder uses a G3/8 port. It generates 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 of 513 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80X350SFTC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X350SFTC replacement — usually within 7-8 hours.