This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X400SN, 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 SI80X400SN
The AirTAC SI80 Standard Air Cylinder SI80X400SN is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 400mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80X400SN, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke400 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80X400SN
- 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 SI80X400SN
The AirTAC SI80X400SN is a discontinued double-acting ISO 15552 profile cylinder with an 80mm bore and 400mm stroke. Delivering 2513 N push force at 0.5 MPa, it is replaced by the SAI80X400SN. This direct successor retains the exact ISO 15552 mounting interface, G3/8 port, and M20x1.5 rod thread, fitting existing fixtures perfectly.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. The -S magnet supports CS1-B/DS1-B sensors, while the -N NBR seal suits -20 to +70 C (Viton H raises this to 150 C).
Airtac SI80 Standard Air Cylinder SI80X400SN Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X400SN |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X400SN |
| Bore size | Ø80 mm |
| Stroke | 400 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 SAI80X400SN 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 SAI80X400SN 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 SI80X400SN
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×400 | 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 SI80X400SN Is Used
Pallet Diversion
Provides the 2513 N push force needed to divert heavy pallets across conveyor lanes during high-throughput packaging operations.
Press Ejection
Ejects formed metal components from stamping presses, utilizing the adjustable 36mm air cushions to decelerate the rod smoothly at stroke ends.
Replacing the Airtac SI80 Standard Air Cylinder SI80X400SN with the SAI80X400SN
To replace the SI80X400SN, order the SAI80X400SN direct. Confirm the ISO 15552 mounting accessory (LB, FA, TC, etc.), the G3/8 port, and the -S magnet for CS1-B/DS1-B switches. The -N NBR seal handles standard temps; choose Viton H for heat. If you need less force, a 63mm bore gives 1559 N [email protected]; if you need more, a 100mm bore gives 3927 N. Note: 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 variants. Finally, at 400mm stroke, use an external guide to prevent rod bending from side loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X400SN
- ✓ 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 SI80X400SN FAQ
Yes, the SI80X400SN is discontinued. The direct replacement is the SAI80X400SN. It is dimensionally interchangeable per ISO 15552, matching the 80mm bore, 400mm stroke, 2513 N force, G3/8 port, and mounting interface.
At 0.5 MPa it pushes 2513 N and pulls 2268 N. At 0.7 MPa push is 3518 N, and at 0.9 MPa it is 4523 N. The theoretical max is 513 kgf at 1.0 MPa. Operating speed is 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80X400SN
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X400SN replacement — usually within 7-8 hours.