This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80BX325S, 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 SI80BX325S
The AirTAC SI80 Standard Air Cylinder SI80BX325S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 325mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80BX325S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke325 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80BX325S
- 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 SI80BX325S
The AirTAC SI80BX325S is a discontinued double-acting ISO 15552 profile cylinder with a 325 mm stroke and an SUS304 stainless steel piston rod. It delivers 2513 N push and 2268 N pull at 0.5 MPa. The direct replacement is the SAI80BX325S, which matches the original G3/8 port, M20x1.5 thread, and ISO 15552 mounting interface for a seamless fixture swap.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. Because the -S magnet is present, it supports legacy CS1-B/DS1-B sensors, while the SAI family uses current AirTAC switches.
Airtac SI80 Standard Air Cylinder SI80BX325S Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80BX325S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80BX325S |
| Bore size | Ø80 mm |
| Stroke | 325 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 SAI80BX325S 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 SAI80BX325S 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 SI80BX325S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×325 | 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 SI80BX325S Is Used
Stainless Rod Actuation
Ideal for packaging machinery requiring corrosion resistance, utilizing the SUS304 rod for reliable pushing in washdown environments.
Material Diverting
Provides robust 2513 N force at 0.5 MPa to divert heavy packages on conveyors, with the 325 mm stroke offering extended reach.
Replacing the Airtac SI80 Standard Air Cylinder SI80BX325S with the SAI80BX325S
To replace the SI80BX325S, order the SAI80BX325S and confirm the ISO 15552 mounting interface, 80 mm bore, 325 mm stroke, G3/8 port, and SUS304 rod. The SAI family also introduces SAIL, SAIF, and BSAI lock or valve variants the SI lacked. When sizing, neighbouring bores offer different force classes; this 80 mm bore yields 2513 N at 0.5 MPa. Note that a plain cylinder drifts without live air, so for load holding use an external rod lock, pilot check valve, or the SAIL/BSAI variant. Finally, at 325 mm stroke, use external guides to prevent rod bending and side loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80BX325S
- ✓ 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 SI80BX325S FAQ
Yes, the SI80BX325S is discontinued. The direct replacement is the SAI80BX325S. It is dimensionally interchangeable per ISO 15552, retaining the same 80 mm bore, 325 mm stroke, G3/8 port, and mounting interface.
The G3/8 port bore delivers 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 SAI80BX325S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80BX325S replacement — usually within 7-8 hours.