This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X320S, 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 SI80X320S
The AirTAC SI80 Standard Air Cylinder SI80X320S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 320mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80X320S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke320 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80X320S
- 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 SI80X320S
The AirTAC SI80X320S is a discontinued double-acting ISO 15552 profile cylinder with an 80 mm bore and 320 mm stroke. Delivering 2513 N push force at 0.5 MPa through a G3/8 port, it is replaced by the SAI80X320S. This direct upgrade shares the exact ISO 15552 mounting interface, bore, stroke, force and port.
The SAI features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure. The -S suffix means a piston magnet for CS1-B/DS1-B sensors; the SAI uses current AirTAC switches. SAIL lock, SAIF valve and BSAI clamp-lock variants are available.
Airtac SI80 Standard Air Cylinder SI80X320S Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X320S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X320S |
| Bore size | Ø80 mm |
| Stroke | 320 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 SAI80X320S 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 SAI80X320S 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 SI80X320S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×320 | 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 SI80X320S 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, where the 320 mm stroke provides the necessary reach and the adjustable cushion decelerates the rod.
Replacing the Airtac SI80 Standard Air Cylinder SI80X320S with the SAI80X320S
To replace the SI80X320S, order SAI80X320S. Confirm the ISO 15552 mounting interface, 80 mm bore, 320 mm stroke, G3/8 port (PT/G/NPT), M20x1.5 rod thread and mounting accessory. The -S suffix ensures a piston magnet for position sensing.
Sizing both ways: a 63 mm bore yields 1559 N push at 0.5 MPa, while a 100 mm bore yields 3927 N. A plain cylinder drifts on air loss as the 36 mm cushion only decelerates; for load holding use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant. For the 320 mm stroke, use an external guide to prevent rod bending under side loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X320S
- ✓ 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 SI80X320S FAQ
Yes, the SI80X320S is discontinued. The direct replacement is the SAI80X320S. It shares the same ISO 15552 mounting interface, 80 mm bore, 320 mm stroke, output force, G3/8 port and accessories, fitting existing fixtures perfectly.
The 80 mm bore provides 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. Operating speed is 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80X320S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X320S replacement — usually within 7-8 hours.