This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80BX750S, 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 SI80BX750S
The AirTAC SI80 Standard Air Cylinder SI80BX750S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 750mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80BX750S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke750 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80BX750S
- 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 SI80BX750S
The AirTAC SI80BX750S is a discontinued double-acting ISO 15552 profile cylinder with a 750 mm stroke, SUS304 stainless steel piston rod, and a built-in magnet. Delivering 2513 N push and 2268 N pull at 0.5 MPa, it is superseded by the SAI80BX750S. This direct replacement shares the exact ISO 15552 mounting interface, G3/8 port, and 513 kgf maximum force, fitting existing fixtures seamlessly.
The SAI upgrade features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and long life. The SAI family also adds SAIL, SAIF, and BSAI lock variants absent in the SI line.
Airtac SI80 Standard Air Cylinder SI80BX750S Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80BX750S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80BX750S |
| Bore size | Ø80 mm |
| Stroke | 750 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 SAI80BX750S 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 SAI80BX750S 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 SI80BX750S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×750 | 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 SI80BX750S Is Used
Long-Stroke Diversion
Pushes heavy pallets sideways on a transfer line with the 750 mm stroke, relying on external guides to prevent rod bending.
Vertical Lift Gate
Raises a 128 kg access door using the 2513 N push force at 0.5 MPa, requiring a pilot check valve to hold the load safely.
Stainless Rod Actuation
Drives a washdown-grade clamping mechanism where the SUS304 rod provides necessary corrosion resistance against moisture.
Replacing the Airtac SI80 Standard Air Cylinder SI80BX750S with the SAI80BX750S
To replace this SI80BX750S, order the SAI80BX750S. Verify the ISO 15552 mounting interface, 80 mm bore, 750 mm stroke, G3/8 port, and your specific mounting accessory (LB, FA, TC, etc.). The -S magnet enables legacy CS1-B/DS1-B sensors, while the SAI uses current AirTAC switches. The -B rod is SUS304 stainless steel. If sizing alternatives, neighboring bores (63 mm or 100 mm) shift the 0.5 MPa push force to 1559 N or 3927 N. Note that a 750 mm stroke requires external guides to prevent rod-bending side loads. A plain cylinder drifts without live air; for load holding, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80BX750S
- ✓ 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 SI80BX750S FAQ
Yes, the SI80BX750S is discontinued. The direct replacement is the SAI80BX750S. It is dimensionally interchangeable per ISO 15552, matching the 80 mm bore, 750 mm stroke, G3/8 port, and mounting interface.
At 0.5 MPa it provides 2513 N push and 2268 N pull. At 0.7 MPa push is 3518 N, and at 0.9 MPa it is 4523 N. The theoretical max force is 513 kgf at 1.0 MPa. Operating pressure is 0.15-1.0 MPa, speed is 30-800 mm/s, and the G3/8 port is fixed by the bore.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80BX750S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80BX750S replacement — usually within 7-8 hours.