This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X303S, 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 SI80X303S
The AirTAC SI80 Standard Air Cylinder SI80X303S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 303mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80X303S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke303 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80X303S
- 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 SI80X303S
The AirTAC SI80X303S is a discontinued double-acting ISO 15552 profile cylinder featuring a 303 mm stroke, G3/8 port, and 2513 N push force at 0.5 MPa. AirTAC replaced this legacy unit with the SAI80X303S. This direct upgrade shares the exact ISO 15552 mounting interface, bore, stroke, and output force, fitting existing fixtures perfectly.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and long life. The SAI family also adds SAIL, SAIF, and BSAI lock or valve variants the SI lacked. Your -S suffix means a piston magnet for CS1-B/DS1-B switches; the SAI uses current AirTAC switches.
Airtac SI80 Standard Air Cylinder SI80X303S Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X303S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X303S |
| Bore size | Ø80 mm |
| Stroke | 303 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 SAI80X303S 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 SAI80X303S 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 SI80X303S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×303 | 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 SI80X303S Is Used
Pallet Diversion
Actuates heavy lane diverters on packaging lines, utilizing the 2513 N push force to shift loaded pallets smoothly at 0.5 MPa operating pressure.
Press Ejection
Ejects formed metal parts from stamping presses, relying on the 36 mm adjustable air cushions at both ends to decelerate the 25 mm rod rapidly.
Replacing the Airtac SI80 Standard Air Cylinder SI80X303S with the SAI80X303S
To replace the SI80X303S, order the SAI80X303S. Verify your ISO 15552 mounting accessory (LB, FA, TC, etc.), the G3/8 air port, and the M20x1.5 rod thread. Because the 303 mm stroke exceeds 300 mm, add external guides to prevent rod bending and side-load wear. If you need more force, the neighboring 100 mm bore yields 3927 N push at 0.5 MPa; if you need less, the 63 mm bore yields 1559 N. 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 → SAI80X303S
- ✓ 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 SI80X303S FAQ
Yes, the SI80X303S is discontinued. The direct replacement is the SAI80X303S. It shares the same ISO 15552 mounting interface, 80 mm bore, 303 mm stroke, output force, and G3/8 port, fitting directly into your existing fixtures.
The bore is 80 mm with 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.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80X303S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X303S replacement — usually within 7-8 hours.