This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80BX900S, 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 SI80BX900S
The AirTAC SI80 Standard Air Cylinder SI80BX900S 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 SAI80BX900S, 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 → SAI80BX900S
- 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 SI80BX900S
The AirTAC SI80BX900S is a discontinued double-acting ISO 15552 profile cylinder with an extruded aluminum barrel, adjustable air cushions, and a SUS304 stainless steel piston rod. Delivering 2513 N push force at 0.5 MPa, it is replaced by the SAI80BX900S. This direct upgrade keeps the same G3/8 port, M20x1.5 thread, and 900 mm stroke.
The SAI features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure. The -S magnet works with legacy CS1-B/DS1-B sensors, while Viton H seals raise heat resistance to 150 C.
Airtac SI80 Standard Air Cylinder SI80BX900S Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80BX900S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80BX900S |
| 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 SAI80BX900S 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 SAI80BX900S 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 SI80BX900S
| 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 SI80BX900S Is Used
Long-Stroke Diversion
Pushes heavy pallets across 900 mm transfer lines where the 2513 N thrust at 0.5 MPa handles high friction loads smoothly.
High-Reach Stacking
Actuates tiered storage platforms in logistics hubs, requiring external guides to manage side loads over the extended length.
Replacing the Airtac SI80 Standard Air Cylinder SI80BX900S with the SAI80BX900S
To replace the SI80BX900S, order the SAI80BX900S, confirming the ISO 15552 mounting interface, 80 mm bore, 900 mm stroke, G3/8 port, and mounting accessory. The -B rod is SUS304 stainless steel, and the -S magnet works with legacy CS1-B/DS1-B switches (the SAI uses current AirTAC switches). If sizing down, a 63 mm bore yields 1559 N push at 0.5 MPa; sizing up to 100 mm provides 3927 N. For this 900 mm stroke, use external guides to prevent rod bending and side-load damage. The air cushion only decelerates the load; it does not hold position. For load holding on air loss, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80BX900S
- ✓ 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 SI80BX900S FAQ
Yes, the SI80BX900S is discontinued. The direct replacement is the SAI80BX900S. It shares the same ISO 15552 mounting interface, 80 mm bore, 900 mm stroke, force, and G3/8 port, fitting existing fixtures perfectly.
The G3/8 port bore delivers 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. It operates at 30-800 mm/s with a 36 mm adjustable cushion.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80BX900S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80BX900S replacement — usually within 7-8 hours.