This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80BX900, 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 SI80BX900
The AirTAC SI80 Standard Air Cylinder SI80BX900 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 900mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80BX900, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke900 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80BX900
- 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 SI80BX900
The AirTAC SI80BX900 is a discontinued double-acting ISO 15552 profile cylinder with an 80mm bore and 900mm stroke. It delivers 2513 N push force at 0.5 MPa via a G3/8 port. AirTAC replaced this legacy unit with the SAI80BX900, a direct upgrade retaining the exact ISO 15552 mounting interface, M20x1.5 rod thread, and 36mm cushions.
The SAI replacement features an upgraded piston seal using two Y-shaped one-way elements for low start-up pressure and long life. This -B variant uses a SUS304 stainless rod for corrosion resistance, but lacks a magnet (-S) so it cannot accept CS1-B/DS1-B sensors.
Airtac SI80 Standard Air Cylinder SI80BX900 Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80BX900 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80BX900 |
| Bore size | Ø80 mm |
| Stroke | 900 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 SAI80BX900 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 SAI80BX900 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 SI80BX900
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×900 | 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 SI80BX900 Is Used
Long-Stroke Diversion
Drives large packages across wide conveyor belts over its 900mm travel, relying on the 2513 N thrust at 0.5 MPa to push heavy cartons smoothly into sorting lanes.
Pallet Handling Gate
Actuates heavy safety gates or lifting mechanisms on palletizing lines, where the SUS304 stainless rod provides necessary corrosion resistance in humid washdown environments.
Replacing the Airtac SI80 Standard Air Cylinder SI80BX900 with the SAI80BX900
To replace the SI80BX900, order the SAI80BX900. Confirm the ISO 15552 mounting interface, 80mm bore, 900mm stroke, G3/8 port, and your specific mounting accessory (LB, FA, TC, etc.). Because this SKU lacks the -S magnet, it cannot support position sensing; if switches are needed, specify an SAI80BX900S. Sizing checks: an adjacent 63mm bore yields 1559 N push at 0.5 MPa, while a 100mm bore yields 3927 N. For load holding on air loss, note that a plain cylinder drifts; the cushions only decelerate. Use an external pilot check valve, rod lock, or the SAIL/BSAI lock variants. Finally, at 900mm stroke, prevent rod bending by guiding the load externally to avoid side loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80BX900
- ✓ 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 SI80BX900 FAQ
Yes, the SI80BX900 is discontinued. The direct replacement is the SAI80BX900. It features the same ISO 15552 mounting interface, 80mm bore, 900mm stroke, output force, G3/8 port, and M20x1.5 rod thread, fitting directly into existing fixtures.
The 80mm bore uses a G3/8 port. Force output is 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 maximum of 513 kgf at 1.0 MPa. Operating speed is 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80BX900
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