This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80BX425, 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 SI80BX425
The AirTAC SI80 Standard Air Cylinder SI80BX425 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 425mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80BX425, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke425 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80BX425
- 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 SI80BX425
The AirTAC SI80BX425 is a discontinued double-acting ISO 15552 profile cylinder with an 80mm bore and 425mm stroke. It delivers 2513N push force at 0.5MPa via a G3/8 port. The direct replacement is the SAI80BX425, matching the exact bore, stroke, force, port and ISO 15552 mounting interface. This SKU features a SUS304 stainless steel rod for corrosion resistance, but lacks a magnet so it cannot accept a position sensor.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and long life. Note that plain cylinders drift on air loss; for load holding use an external rod lock or the SAIL/BSAI lock variants.
Airtac SI80 Standard Air Cylinder SI80BX425 Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80BX425 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80BX425 |
| Bore size | Ø80 mm |
| Stroke | 425 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 SAI80BX425 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 SAI80BX425 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 SI80BX425
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×425 | 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 SI80BX425 Is Used
Packaging Divert
Pushes heavy cartons across transfer plates using the 2513N thrust at 0.5MPa, with the 425mm stroke clearing wide belt gaps.
Pallet Stopper
Halts inbound pallets on gravity conveyors; the SUS304 rod withstands humid dock environments while absorbing impact via cushions.
Replacing the Airtac SI80 Standard Air Cylinder SI80BX425 with the SAI80BX425
To replace this SI80BX425, order the SAI80BX425. Verify your ISO 15552 mounting fixtures (LB, FA, CA, TC), the G3/8 port, and the 425mm stroke. Because this SKU lacks the -S magnet, it cannot support legacy CS1-B/DS1-B sensors; if sensing is needed, switch to a magnet-equipped SAI. For loads needing holding power without live air, use a pilot check valve or the SAIL lock variant. With a 425mm stroke, prevent rod bending by guiding the load externally. Sizing options: the 80mm bore yields 2513N push at 0.5MPa; step down to a 63mm bore for 1559N, or up to a 100mm bore for 3927N.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80BX425
- ✓ 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 SI80BX425 FAQ
Yes, the SI80BX425 is discontinued. The direct replacement is the SAI80BX425. It matches the ISO 15552 mounting interface, 80mm bore, 425mm stroke, force, and G3/8 port, fitting existing fixtures perfectly.
This double-acting cylinder uses a G3/8 port. It generates 2513N push and 2268N pull at 0.5MPa, 3518N push at 0.7MPa, 4523N push at 0.9MPa, and a theoretical max of 513kgf at 1.0MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80BX425
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80BX425 replacement — usually within 7-8 hours.