This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X300S, 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 SI80X300S
The AirTAC SI80 Standard Air Cylinder SI80X300S 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 SAI80X300S, 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 → SAI80X300S
- 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 SI80X300S
The AirTAC SI80X300S is a discontinued double-acting ISO 15552 profile cylinder with an extruded aluminum barrel, delivering 2513 N push and 2268 N pull at 0.5 MPa. It features a 25 mm rod, M20x1.5 thread, G3/8 port, and 36 mm adjustable air cushions. AirTAC replaced this legacy unit with the SAI80X300S, a direct replacement sharing the exact ISO 15552 mounting interface, 300 mm stroke, force, and port size.
The SAI upgrade introduces an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and long life. The SAI family also adds SAIL, SAIF, and BSAI lock variants the SI lacked. Your -S suffix indicates a piston magnet for legacy CS1-B/DS1-B sensors; the SAI uses current AirTAC switches.
Airtac SI80 Standard Air Cylinder SI80X300S Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X300S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X300S |
| 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 SAI80X300S 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 SAI80X300S 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 SI80X300S
| 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 SI80X300S Is Used
Package Diversion
Actuates heavy sorting arms on high-speed packaging lines, utilizing the 2513 N push force to reliably redirect bulky goods without hesitation.
Pallet Handling
Drives lifting and positioning mechanisms for palletized goods, where the 300 mm stroke and 128 kg vertical lift capacity excel at transfer stations.
Press Ejection
Ejects formed metal or plastic components from press beds, relying on the 36 mm adjustable air cushions to decelerate the rod smoothly at stroke end.
Replacing the Airtac SI80 Standard Air Cylinder SI80X300S with the SAI80X300S
To replace the SI80X300S, order the SAI80X300S. Verify the ISO 15552 mounting interface (LB, FA, TC, etc.), the G3/8 port thread (PT/G/NPT), and the -S magnet requirement. If you need more force, the neighboring 100 mm bore offers 3927 N push at 0.5 MPa; if less is needed, the 63 mm bore provides 1559 N. Because this is a 300 mm stroke, prevent rod bending by guiding the load externally to avoid side loads. A plain cylinder drifts on air loss—the cushion only decelerates. For load holding, use an external rod lock, a pilot check valve, or the SAIL/BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X300S
- ✓ 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 SI80X300S FAQ
Yes, the SI80X300S is discontinued. The direct replacement is the SAI80X300S. It shares the identical ISO 15552 mounting interface, 80 mm bore, 300 mm stroke, output force, G3/8 port, and accessories, fitting directly into existing fixtures.
The bore features a G3/8 air port. It delivers 2513 N push and 2268 N pull at 0.5 MPa, 3518 N push at 0.7 MPa, and 4523 N push at 0.9 MPa. The theoretical maximum force is 513 kgf at 1.0 MPa. Operating speed is 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80X300S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X300S replacement — usually within 7-8 hours.