This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X550SFTC, 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 SI80X550SFTC
The AirTAC SI80 Standard Air Cylinder SI80X550SFTC is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 550mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80X550SFTC, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke550 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80X550SFTC
- 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 SI80X550SFTC
The AirTAC SI80X550SFTC is a discontinued double-acting ISO 15552 profile cylinder with an 80mm bore, 550mm stroke and FTC trunnion mount. Delivering 2513N push at 0.5MPa through a G3/8 port, it is replaced by the SAI80X550SFTC. The SAI is a direct: identical interface, bore, stroke, force and mount.
The SAI upgrade features two Y-shaped one-way piston seals for low start-up pressure and long life. The SI -S magnet works with CS1-B/DS1-B sensors, while SAIL lock or BSAI clamp-lock variants cover load holding.
Airtac SI80 Standard Air Cylinder SI80X550SFTC Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X550SFTC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X550SFTC |
| Bore size | Ø80 mm |
| Stroke | 550 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 SAI80X550SFTC 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 SAI80X550SFTC 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 SI80X550SFTC
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×550 | 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 SI80X550SFTC Is Used
Pallet Diversion
Shifts heavy pallets laterally across conveyor lines using the 2513N push force at 0.5MPa, with the 550mm stroke covering full lane widths.
Material Ejection
Pushes molded parts out of press zones, utilizing the adjustable 36mm air cushions to decelerate the rod smoothly at stroke ends.
Replacing the Airtac SI80 Standard Air Cylinder SI80X550SFTC with the SAI80X550SFTC
To replace the SI80X550SFTC, order the SAI80X550SFTC. Verify the ISO 15552 FTC trunnion mount, 80mm bore, 550mm stroke, G3/8 port and -S magnet for CS1-B/DS1-B switches. Neighbouring bores: a 63mm yields 1559N [email protected], a 100mm yields 3927N. A plain cylinder drifts on air loss; cushions only decelerate. For held loads use SAIL, BSAI or an external pilot check valve. At 550mm stroke, use external guides to prevent rod bending.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X550SFTC
- ✓ 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 SI80X550SFTC FAQ
Yes, the SI80X550SFTC is discontinued. The direct replacement is the SAI80X550SFTC. It is dimensionally interchangeable per ISO 15552, keeping the same 80mm bore, 550mm stroke, FTC mount and G3/8 port.
It has a 25mm rod, M20x1.5 thread, 36mm cushions, and operates at 30-800mm/s. Force ratings are 2513N push and 2268N pull at 0.5MPa, 3518N push at 0.7MPa, and a max force of 513kgf at 1.0MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80X550SFTC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X550SFTC replacement — usually within 7-8 hours.