This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80BX400SH, 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 SI80BX400SH
The AirTAC SI80 Standard Air Cylinder SI80BX400SH 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 SAI80BX400SH, 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 → SAI80BX400SH
- 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 SI80BX400SH
The AirTAC SI80BX400SH is a discontinued double-acting ISO 15552 profile cylinder featuring an extruded aluminum barrel, a SUS304 stainless piston rod, and a Viton H high-temperature seal. It delivers 2513 N push and 2268 N pull at 0.5 MPa through its G3/8 port. AirTAC replaced this legacy unit with the SAI80BX400SH, a direct sharing the exact ISO 15552 mounting interface, 400 mm stroke, and force class.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and extended life. The SAI family also adds BSAI clamp-lock and SAIL air-released lock variants absent in the SI line. This -S model retains its magnet for CS1-B/DS1-B sensors, though the SAI uses current AirTAC switches.
Airtac SI80 Standard Air Cylinder SI80BX400SH Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80BX400SH |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80BX400SH |
| 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 SAI80BX400SH 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 SAI80BX400SH 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 SI80BX400SH
| 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 SI80BX400SH Is Used
High-Temp Forming Press
Drives tooling in hot environments using the Viton H seal and SUS304 rod, providing 3518 N at 0.7 MPa to actuate heavy forming dies.
Long-Stroke Diversion Gate
Utilizes the 400 mm stroke to shift large pallets between parallel conveyor lines, requiring external guides to prevent rod bending.
Corrosive Washdown Rejector
Employs the stainless SUS304 rod to push heavy containers off a washdown line, relying on the 2513 N push force at 0.5 MPa.
Replacing the Airtac SI80 Standard Air Cylinder SI80BX400SH with the SAI80BX400SH
To replace the SI80BX400SH, order the SAI80BX400SH and verify the ISO 15552 mounting interface, G3/8 port, M20x1.5 rod thread, and your specific mounting accessory. The -S magnet and -B SUS304 rod transfer directly, while the -H Viton seal handles 0-150 C environments. If sizing alternatives, a 63 mm bore yields 1559 N push at 0.5 MPa, and a 100 mm bore yields 3927 N. For the 400 mm stroke, use an external guide to prevent rod bending and side-load wear. A plain cylinder drifts without live air; for load holding, use an external pilot check valve or the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80BX400SH
- ✓ 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 SI80BX400SH FAQ
Yes, the SI80BX400SH is discontinued. The direct replacement is the SAI80BX400SH. It shares the identical ISO 15552 mounting interface, 80 mm bore, 400 mm stroke, G3/8 port, and output force, fitting existing fixtures perfectly.
This double-acting cylinder uses a G3/8 air port. It provides a push force of 2513 N and a pull force of 2268 N at 0.5 MPa, 3518 N at 0.7 MPa, 4523 N at 0.9 MPa, and a theoretical maximum of 513 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80BX400SH
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80BX400SH replacement — usually within 7-8 hours.