This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80BX70, 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 SI80BX70
The AirTAC SI80 Standard Air Cylinder SI80BX70 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 70mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80BX70, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke70 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80BX70
- 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 SI80BX70
The AirTAC SI80BX70 is a discontinued double-acting ISO 15552 profile cylinder with an 80mm bore and 70mm stroke. It delivers 2513N push and 2268N pull at 0.5MPa via a G3/8 port. The direct replacement is the SAI80BX70, which shares identical ISO 15552 mounting dimensions, output force, and stroke.
This SKU features a SUS304 stainless piston rod for corrosion resistance. The SAI upgrade uses two Y-shaped piston seals for low start-up pressure. Note that this non-magnet version cannot accept a sensor.
Airtac SI80 Standard Air Cylinder SI80BX70 Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80BX70 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80BX70 |
| Bore size | Ø80 mm |
| Stroke | 70 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 SAI80BX70 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 SAI80BX70 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 SI80BX70
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×70 | 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 SI80BX70 Is Used
Stainless Rod Clamping
Uses the SUS304 rod to resist moisture while providing 2513N of clamping force at 0.5MPa for wet machining environments.
Transfer Line Diversion
Executes 70mm strokes to push heavy components between conveyor lanes, leveraging the 128kg safe vertical lift capacity.
Heavy Fixture Actuation
Fits existing ISO 15552 tooling mounts to drive heavy production fixtures, dropping directly into the SAI80BX70 footprint.
Replacing the Airtac SI80 Standard Air Cylinder SI80BX70 with the SAI80BX70
To replace the SI80BX70, order the SAI80BX70. Verify the ISO 15552 mounting interface, 80mm bore, 70mm stroke, G3/8 port, and SUS304 rod. If you need position sensing, select an SAI80X70S model with a magnet, as this plain SKU lacks one. Sizing options: an 80mm bore yields 2513N push at 0.5MPa, while a 63mm bore offers 1559N. For load holding on air loss, the cushion only decelerates; use an external pilot check valve or the SAIL lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80BX70
- ✓ 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 SI80BX70 FAQ
Yes, the SI80BX70 is discontinued. The direct replacement is the SAI80BX70. It is dimensionally interchangeable per ISO 15552, retaining the same 80mm bore, 70mm stroke, G3/8 port, and mounting interface.
It features a G3/8 port. Force output is 2513N push and 2268N pull at 0.5MPa, 3518N push at 0.7MPa, 4523N push at 0.9MPa, and a maximum theoretical force of 513kgf at 1.0MPa.
Request a Quote for the SAI80BX70
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80BX70 replacement — usually within 7-8 hours.