This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X300FA, 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 SI80X300FA
The AirTAC SI80 Standard Air Cylinder SI80X300FA 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 SAI80X300FA, 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 → SAI80X300FA
- 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 SI80X300FA
The AirTAC SI80X300FA is a discontinued double-acting ISO 15552 profile cylinder with an FA flange mount. It delivers 2513 N push and 2268 N pull at 0.5 MPa through a 25 mm rod and G3/8 port. Because this legacy unit lacks a -S magnet, it cannot accept a position switch. The direct replacement is the SAI80X300FA, matching the 300 mm stroke, 513 kgf max force, and ISO 15552 mounting interface.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and extended life. The SAI family also adds SAIL, SAIF, and BSAI lock variants absent in the SI line.
Airtac SI80 Standard Air Cylinder SI80X300FA Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X300FA |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X300FA |
| 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 SAI80X300FA 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 SAI80X300FA 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 SI80X300FA
| 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 SI80X300FA Is Used
Press Fit Assembly
Drives bearings or pins into housings, utilizing the 2513 N push force at 0.5 MPa for reliable press fits.
Pallet Diversion
Actuates a heavy diverter arm on a packaging line, with the FA flange providing rigid mounting for lateral loads.
Replacing the Airtac SI80 Standard Air Cylinder SI80X300FA with the SAI80X300FA
To replace the SI80X300FA, order the SAI80X300FA. Confirm the ISO 15552 FA flange interface, 80 mm bore, 300 mm stroke, G3/8 port, and M20x1.5 rod thread. If you need position sensing, select an SAI model with the S magnet suffix, as this no-S SKU cannot take a sensor. For sizing alternatives, a 63 mm bore yields 1559 N push at 0.5 MPa, while a 100 mm bore yields 3927 N. Note that a plain cylinder drifts on air loss; the cushion only decelerates. For load holding, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant. Finally, at 300 mm stroke, use external guides to prevent rod bending and side-load wear.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X300FA
- ✓ 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 SI80X300FA FAQ
Yes, the SI80X300FA is discontinued. The direct replacement is the SAI80X300FA. It shares the same ISO 15552 FA mounting interface, 80 mm bore, 300 mm stroke, output force, and G3/8 port, fitting existing fixtures perfectly.
This 80 mm bore cylinder features 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 maximum force of 513 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80X300FA
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X300FA replacement — usually within 7-8 hours.