This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80BX65S, 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 SI80BX65S
The AirTAC SI80 Standard Air Cylinder SI80BX65S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 65mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80BX65S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke65 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80BX65S
- 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 SI80BX65S
The AirTAC SI80BX65S is a discontinued double-acting ISO 15552 profile cylinder featuring an 80mm bore, 65mm stroke, SUS304 stainless steel rod, and a piston magnet. Delivering 2513 N push force at 0.5 MPa via a G3/8 port, it is replaced by the direct replacement SAI80BX65S, which shares identical mounting, bore, stroke, force, and port specs.
The SAI upgrade uses two Y-shaped one-way piston seals for low start-up pressure and long life. The SAI family also adds SAIL, SAIF, and BSAI lock variants the SI lacked. Your -S magnet works with legacy CS1-B/DS1-B sensors, while SAI uses current AirTAC switches.
Airtac SI80 Standard Air Cylinder SI80BX65S Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80BX65S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80BX65S |
| Bore size | Ø80 mm |
| Stroke | 65 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 SAI80BX65S 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 SAI80BX65S 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 SI80BX65S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×65 | 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 SI80BX65S Is Used
Stainless Rod Clamping
Leverages the SUS304 rod and 2513 N push force to secure heavy metal components in humid machining environments without corrosion.
Replacing the Airtac SI80 Standard Air Cylinder SI80BX65S with the SAI80BX65S
To replace the SI80BX65S, order the SAI80BX65S. Verify the ISO 15552 mounting interface, 65mm stroke, G3/8 port, and M20x1.5 rod thread. The -B denotes a SUS304 stainless rod for corrosion resistance, and -S means a magnet for CS1-B/DS1-B switches. Sizing both ways: an 80mm bore yields 2513 N push at 0.5 MPa, while a 63mm bore yields 1559 N. A plain cylinder drifts on air loss; cushions only decelerate. For load holding, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80BX65S
- ✓ 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 SI80BX65S FAQ
Yes, the SI80BX65S is discontinued. The direct replacement is the SAI80BX65S. It is dimensionally interchangeable per ISO 15552, retaining the same 80mm bore, 65mm stroke, SUS304 rod, G3/8 port, and mounting interface.
It features a G3/8 air port and provides 2513 N push and 2268 N pull at 0.5 MPa. At 0.7 MPa push is 3518 N, and 4523 N at 0.9 MPa. The theoretical maximum force is 513 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80BX65S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80BX65S replacement — usually within 7-8 hours.