This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X300FTC, 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 SI80X300FTC
The AirTAC SI80 Standard Air Cylinder SI80X300FTC is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 300mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80X300FTC, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke300 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80X300FTC
- 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 SI80X300FTC
The AirTAC SI80X300FTC is a discontinued double-acting ISO 15552 profile cylinder with an extruded aluminum barrel, adjustable air cushions, and an FTC trunnion mount. Generating 2513 N push force at 0.5 MPa through its G3/8 port, it is replaced by the SAI80X300FTC. This direct upgrade matches the exact bore, stroke, force, port, and mounting interface.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. Note this SKU lacks a magnet (-S), so it cannot take CS1-B/DS1-B sensors. For high heat, Viton H seals raise the temperature limit to 150 C.
Airtac SI80 Standard Air Cylinder SI80X300FTC Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X300FTC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X300FTC |
| Bore size | Ø80 mm |
| Stroke | 300 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 SAI80X300FTC 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 SAI80X300FTC 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 SI80X300FTC
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×300 | 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 SI80X300FTC Is Used
Pallet Diversion
Actuates heavy lane diverters on packaging lines, using the 2513 N thrust to push fully loaded pallets smoothly onto secondary conveyors.
Vertical Lift Gates
Raises and lowers automated warehouse safety gates, handling the 128 kg vertical load margin safely while relying on external guides for the 300 mm stroke.
Press Ejection
Ejects formed metal parts from machining presses, utilizing the adjustable end cushions to decelerate the 25 mm rod rapidly without shock.
Replacing the Airtac SI80 Standard Air Cylinder SI80X300FTC with the SAI80X300FTC
To replace the SI80X300FTC, order the SAI80X300FTC keeping the FTC trunnion mount, 80 mm bore, 300 mm stroke, G3/8 port, and M20x1.5 rod thread. Because this SKU lacks the -S magnet, it cannot accept position sensors; if sensing is needed, order the SAI80X300FTCS and use current AirTAC switches. If sizing up or down, neighboring bores (63 mm or 100 mm) offer 1559 N or 3927 N push at 0.5 MPa. A plain cylinder drifts on air loss—the cushion only decelerates—so for load holding use an external pilot check valve or the SAIL/BSAI lock variants. At 300 mm stroke, prevent rod bending by guiding the load externally to avoid side-load damage.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X300FTC
- ✓ 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 SI80X300FTC FAQ
Yes, the SI80X300FTC is discontinued. The direct replacement is the SAI80X300FTC. It is dimensionally interchangeable per the ISO 15552 mounting interface, matching the 80 mm bore, 300 mm stroke, FTC trunnion mount, and G3/8 port size.
The 80 mm bore uses a G3/8 port and M20x1.5 rod thread. It delivers 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 max force of 513 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80X300FTC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X300FTC replacement — usually within 7-8 hours.