This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X25S, 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 SI80X25S
The AirTAC SI80 Standard Air Cylinder SI80X25S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 25mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80X25S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke25 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80X25S
- 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 SI80X25S
The AirTAC SI80X25S is a discontinued double-acting ISO 15552 profile cylinder with a 25 mm stroke. Delivering 2513 N push force at 0.5 MPa through a G3/8 port, it is replaced by the SAI80X25S. This direct successor matches the bore, stroke, force and mounting interface.
The SAI upgrade features two Y-shaped one-way piston seals for low start-up pressure. Note that plain cylinders drift without air; use the SAIL or BSAI lock variants for holding.
Airtac SI80 Standard Air Cylinder SI80X25S Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X25S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X25S |
| Bore size | Ø80 mm |
| Stroke | 25 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 SAI80X25S 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 SAI80X25S 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 SI80X25S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×25 | 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 SI80X25S Is Used
Short-Stroke Clamping
Ideal for holding heavy castings during machining, using the 2513 N push force to secure parts firmly within a compact 25 mm travel.
Diversion Gate Actuation
Provides robust, fast diverting of heavy pallets on packaging lines, where the 80 mm bore handles high side-loads efficiently.
Pallet Stopper Block
Acts as a heavy-duty end-stop for incoming pallets, absorbing kinetic energy using the 36 mm adjustable air cushions.
Replacing the Airtac SI80 Standard Air Cylinder SI80X25S with the SAI80X25S
To replace the SI80X25S, order the SAI80X25S to keep the ISO 15552 mounting interface, 80 mm bore, 25 mm stroke, G3/8 port, M20x1.5 thread and magnet. If you need less force, a 63 mm bore yields 1559 N at 0.5 MPa; for more, a 100 mm bore gives 3927 N. The cushion only decelerates, so for load holding select the SAIL lock, BSAI clamp-lock, or an external pilot check valve. The SAIF variant integrates a 4M valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X25S
- ✓ 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 SI80X25S FAQ
Yes, the SI80X25S is discontinued. The direct replacement is the SAI80X25S. It is dimensionally interchangeable per ISO 15552, retaining the same 80 mm bore, 25 mm stroke, output force, G3/8 port and mounting accessories.
At 0.5 MPa it pushes 2513 N and pulls 2268 N. Push force is 3518 N at 0.7 MPa and 4523 N at 0.9 MPa. The theoretical max is 513 kgf at 1.0 MPa. Speed is 30-800 mm/s, operating pressure is 0.15-1.0 MPa, and it uses a G3/8 port.
Request a Quote for the SAI80X25S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X25S replacement — usually within 7-8 hours.