This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80BX350S, 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 SI80BX350S
The AirTAC SI80 Standard Air Cylinder SI80BX350S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 350mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80BX350S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke350 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80BX350S
- 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 SI80BX350S
The AirTAC SI80BX350S is a discontinued double-acting ISO 15552 profile cylinder with an 80 mm bore, 350 mm stroke, and a SUS304 stainless steel rod. Delivering 2513 N push force at 0.5 MPa, it is replaced by the SAI80BX350S. This direct successor shares the exact ISO 15552 mounting interface, G3/8 port, and M20x1.5 rod thread, fitting existing fixtures seamlessly.
The SAI upgrade features a new piston seal with two Y-shaped one-way elements for low start-up pressure and long life. It retains the -S magnet for position sensing, though the legacy CS1-B/DS1-B switches are superseded by current AirTAC sensors. For load holding, note that standard cylinders drift without live air; use an external rod lock or the SAIL/BSAI lock variants.
Airtac SI80 Standard Air Cylinder SI80BX350S Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80BX350S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80BX350S |
| Bore size | Ø80 mm |
| Stroke | 350 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 SAI80BX350S 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 SAI80BX350S 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 SI80BX350S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×350 | 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 SI80BX350S Is Used
Diverting Heavy Goods
Drives large package diverters on high-throughput packaging lines, utilizing the 2513 N push force at 0.5 MPa to push heavy cartons reliably.
Pressing and Forming
Applies steady downward clamping pressure for light assembly and forming tasks, where the 350 mm stroke accommodates varying material heights.
Pallet Handling
Actuates lifting mechanisms and stop gates in automated storage systems, with the SUS304 rod offering corrosion resistance in humid environments.
Replacing the Airtac SI80 Standard Air Cylinder SI80BX350S with the SAI80BX350S
To replace the SI80BX350S, order the SAI80BX350S. Confirm the ISO 15552 mounting interface, the 350 mm stroke, G3/8 port, and your mounting accessory. The -B option specifies the SUS304 stainless rod for corrosion resistance, and -S includes the piston magnet. If sizing alternatives, neighboring bores (63 mm or 100 mm) offer 1559 N or 3927 N push at 0.5 MPa. Because this is a 350 mm stroke, use external guides to prevent rod bending and side-load wear. For loads that must not drift on air loss, select the SAIL or BSAI lock variant, or add a pilot check valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80BX350S
- ✓ 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 SI80BX350S FAQ
Yes, the SI80BX350S is discontinued. The direct replacement is the SAI80BX350S. It is dimensionally interchangeable per ISO 15552, retaining the same 80 mm bore, 350 mm stroke, 2513 N force, G3/8 port, and mounting interface.
At 0.5 MPa, it provides 2513 N push and 2268 pull force. At 0.7 MPa it pushes 3518 N, and 4523 N at 0.9 MPa. The theoretical max is 513 kgf at 1.0 MPa. Operating pressure is 0.15-1.0 MPa, speed is 30-800 mm/s, and it uses a G3/8 port.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80BX350S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80BX350S replacement — usually within 7-8 hours.