This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X450FA, 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 SI80X450FA
The AirTAC SI80 Standard Air Cylinder SI80X450FA is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 450mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80X450FA, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke450 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80X450FA
- 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 SI80X450FA
The AirTAC SI80X450FA is a discontinued double-acting ISO 15552 profile cylinder with an 80 mm bore and 450 mm stroke. It delivers 2513 N push and 2268 N pull at 0.5 MPa via a G3/8 port. The direct replacement is the SAI80X450FA, matching the interface, force, and FA flange mount.
The SAI upgrade features two Y-shaped one-way piston seals for low start-up pressure. Note this SKU lacks a magnet, so it cannot accept CS1-B/DS1-B sensors.
Airtac SI80 Standard Air Cylinder SI80X450FA Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X450FA |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X450FA |
| Bore size | Ø80 mm |
| Stroke | 450 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 SAI80X450FA 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 SAI80X450FA 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 SI80X450FA
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×450 | 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 SI80X450FA Is Used
Pallet Diversion
Provides the 2513 N push force needed to deflect heavy pallets onto parallel conveyor lines without rebounding.
Vertical Gate Lift
Raises 128 kg loading dock gates using the 450 mm stroke, requiring external guides to prevent rod bending.
Press Ejection
Ejects formed metal parts from hydraulic presses, utilizing the adjustable 36 mm air cushions to decelerate at stroke end.
Replacing the Airtac SI80 Standard Air Cylinder SI80X450FA with the SAI80X450FA
To replace the SI80X450FA, order the SAI80X450FA. Confirm the ISO 15552 FA flange mount, 80 mm bore, 450 mm stroke, and G3/8 port (PT/G/NPT threads). Sizing both ways: a 63 mm bore gives 1559 N push, while a 100 mm bore yields 3927 N at 0.5 MPa. For load holding, note the air cushion only decelerates; it does not lock. Use an external pilot check valve or the SAIL/BSAI lock variants. At 450 mm, use external guides to prevent rod bending from side loads. This non-magnet SKU cannot take sensors.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X450FA
- ✓ 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 SI80X450FA FAQ
Yes, the SI80X450FA is discontinued. The direct replacement is the SAI80X450FA. It is dimensionally interchangeable per ISO 15552, retaining the same 80 mm bore, 450 mm stroke, FA flange mount, and G3/8 port.
The 80 mm bore uses a G3/8 port. 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 of 513 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80X450FA
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X450FA replacement — usually within 7-8 hours.