This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X125, 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 SI80X125
The AirTAC SI80 Standard Air Cylinder SI80X125 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 125mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80X125, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke125 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80X125
- 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 SI80X125
The AirTAC SI80X125 is a discontinued double-acting ISO 15552 profile cylinder with an 80mm bore and 125mm stroke, delivering 2513N push force at 0.5MPa through its G3/8 port. AirTAC replaced this legacy unit with the SAI80X125, a direct upgrade sharing the exact ISO 15552 mounting interface, M20x1.5 rod thread, and 36mm cushions.
The SAI80X125 features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and long life. Note this non-magnet SKU cannot take a sensor; the legacy SI used CS1-B/DS1-B switches. For high heat, Viton H seals raise the limit to 150C.
Airtac SI80 Standard Air Cylinder SI80X125 Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X125 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X125 |
| Bore size | Ø80 mm |
| Stroke | 125 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 SAI80X125 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 SAI80X125 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 SI80X125
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×125 | 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 SI80X125 Is Used
Press Fit Assembly
Drives bearings into housings with 2513N of push force at 0.5MPa, utilizing the 125mm stroke for precise component insertion.
Pallet Diverting
Pushes heavy pallets off a main conveyor line using the robust 80mm bore and G3/8 air port for rapid actuation.
Replacing the Airtac SI80 Standard Air Cylinder SI80X125 with the SAI80X125
To replace the SI80X125, order the SAI80X125 with the identical ISO 15552 mounting fixture, G3/8 port, and M20x1.5 rod thread. Because this SKU lacks the -S magnet, it cannot accept CS1-B/DS1-B sensors; order an -S suffix if position detection is needed. Sizing both ways: the 80mm bore yields 2513N push at 0.5MPa, while the neighbouring 63mm bore offers 1559N and the 100mm provides 3927N. A plain cylinder drifts on air loss since the cushion only decelerates; for load holding, use an external pilot check valve or the SAIL/BSAI lock variant. The 125mm stroke is standard and under the 1500mm maximum.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X125
- ✓ 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 SI80X125 FAQ
Yes, the SI80X125 is discontinued. The direct replacement is the AirTAC SAI80X125. It shares the identical ISO 15552 mounting interface, 80mm bore, 125mm stroke, G3/8 port, and output force, fitting existing fixtures perfectly.
The 80mm bore uses a G3/8 air port. It generates 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 SAI80X125
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X125 replacement — usually within 7-8 hours.