This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X305S, 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 SI80X305S
The AirTAC SI80 Standard Air Cylinder SI80X305S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 305mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80X305S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke305 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80X305S
- 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 SI80X305S
The AirTAC SI80X305S is a discontinued double-acting ISO 15552 profile cylinder with a built-in piston magnet. Delivering 2513 N push force at 0.5 MPa through an 80 mm bore, it is replaced by the SAI80X305S. This direct successor shares the exact ISO 15552 mounting interface, 305 mm stroke, G3/8 port, and M20x1.5 rod thread.
The SAI upgrade features a two-piece Y-shaped piston seal for low start-up pressure and extended life. The SAI family also introduces SAIL and BSAI lock variants absent in the SI line. Your -S suffix supports legacy CS1-B/DS1-B sensors.
Airtac SI80 Standard Air Cylinder SI80X305S Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X305S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X305S |
| Bore size | Ø80 mm |
| Stroke | 305 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 SAI80X305S 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 SAI80X305S 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 SI80X305S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×305 | 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 SI80X305S Is Used
Pallet Diversion
Pushes heavy pallets laterally across transfer lines using the 2513 N thrust available at 0.5 MPa.
Press Ejection
Ejects formed metal components from stamping presses, utilizing the 36 mm adjustable cushion.
Replacing the Airtac SI80 Standard Air Cylinder SI80X305S with the SAI80X305S
To replace the SI80X305S, order the SAI80X305S, confirming the ISO 15552 interface, 80 mm bore, 305 mm stroke, G3/8 port, and mounting accessory. The -S magnet enables CS1-B/DS1-B switches, though the SAI uses current AirTAC sensors. At 0.5 MPa it yields 2513 N push; if less force is needed, a 63 mm bore provides 1559 N. Because 305 mm exceeds 300 mm, use an external guide to prevent rod bending under side loads. Note that a plain cylinder drifts on air loss; for load holding, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X305S
- ✓ 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 SI80X305S FAQ
Yes, the SI80X305S is discontinued. The direct replacement is the SAI80X305S. It shares the same ISO 15552 mounting interface, 80 mm bore, 305 mm stroke, output force, G3/8 port, and accessories, fitting existing fixtures perfectly.
It features a G3/8 air port. Force output is 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 of 513 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80X305S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X305S replacement — usually within 7-8 hours.