This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80BX650, 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 SI80BX650
The AirTAC SI80 Standard Air Cylinder SI80BX650 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 650mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80BX650, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke650 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80BX650
- 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 SI80BX650
The AirTAC SI80BX650 is a discontinued double-acting ISO 15552 profile cylinder with an 80 mm bore and 650 mm stroke. It delivers 2513 N push and 2268 N pull at 0.5 MPa via a G3/8 port. The direct replacement is the SAI80BX650, matching the interface, stroke, force, and mounting.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure. This -B variant uses a SUS304 stainless rod for corrosion resistance. As a no-magnet SKU, it cannot take a sensor.
Airtac SI80 Standard Air Cylinder SI80BX650 Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80BX650 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80BX650 |
| Bore size | Ø80 mm |
| Stroke | 650 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 SAI80BX650 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 SAI80BX650 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 SI80BX650
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×650 | 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 SI80BX650 Is Used
Long-Stroke Diversion
Pushes heavy pallets sideways across a transfer line using the 650 mm stroke and 2513 N push force at 0.5 MPa.
Warehouse Pusher
Actuates large carton pushers in distribution hubs where the 80 mm bore and G3/8 port provide rapid 30-800 mm/s cycling.
Replacing the Airtac SI80 Standard Air Cylinder SI80BX650 with the SAI80BX650
To replace the SI80BX650, order the SAI80BX650. Verify the ISO 15552 mounting interface, 650 mm stroke, G3/8 port, and your specific mounting accessory (LB, FA, TC, etc.). Because this SKU lacks the -S magnet, it cannot accept CS1-B/DS1-B sensors; order an -S variant if position sensing is required. For sizing, a neighbouring 63 mm bore yields 1559 N [email protected], while a 100 mm bore yields 3927 N. The 650 mm stroke demands external guides to prevent rod-bending under side loads. For load holding on air loss, note the cushion only decelerates; use an external pilot check valve or the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80BX650
- ✓ 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 SI80BX650 FAQ
Yes, the SI80BX650 is discontinued. The direct replacement is the SAI80BX650. It is dimensionally interchangeable per ISO 15552, keeping the same 80 mm bore, 650 mm stroke, 2513 N force, G3/8 port, and mounting fixtures.
The 80 mm bore uses a G3/8 port. It generates 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.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80BX650
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80BX650 replacement — usually within 7-8 hours.