This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X1250, 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 SI80X1250
The AirTAC SI80 Standard Air Cylinder SI80X1250 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 1250mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80X1250, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke1250 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80X1250
- 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 SI80X1250
The AirTAC SI80X1250 is a discontinued double-acting ISO 15552 profile cylinder with an 80mm bore and 1250mm stroke. Delivering 2513N push force at 0.5MPa via a G3/8 port, it is replaced by the SAI80X1250. This direct upgrade shares the exact ISO 15552 mounting interface, bore, stroke, and force, fitting existing fixtures perfectly.
The SAI80X1250 features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and long life. Note this SKU lacks a magnet (-S) and cannot take a sensor. For high heat, Viton H seals raise the temperature limit to 150C.
Airtac SI80 Standard Air Cylinder SI80X1250 Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X1250 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X1250 |
| Bore size | Ø80 mm |
| Stroke | 1250 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 SAI80X1250 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 SAI80X1250 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 SI80X1250
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×1250 | 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 SI80X1250 Is Used
Long-Stroke Transfer
Pushes heavy pallets 1250mm down an assembly line using 2513N force at 0.5MPa.
Warehouse Sorting
Actuates large diverter arms across wide belt gaps, relying on the 80mm bore's 2268N pull force.
Replacing the Airtac SI80 Standard Air Cylinder SI80X1250 with the SAI80X1250
To replace the SI80X1250, order the SAI80X1250. Verify your ISO 15552 mounting accessory (LB, FA, TC, etc.), G3/8 port thread (PT/G/NPT), and M20x1.5 rod end. Because this SKU lacks the -S magnet, it cannot accept CS1-B/DS1-B sensors; order an SAI80X1250S if position sensing is required. At 0.5MPa the 80mm bore yields 2513N push / 2268N pull; if undersizing, a 63mm bore gives 1559N push, and a 100mm bore gives 3927N push. A plain cylinder drifts on air loss—the cushion only decelerates—so use an external rod lock or pilot check valve for load holding, or specify the SAIL/BSAI lock variant. Finally, the 1250mm stroke demands external guides to prevent rod bending and side-load damage.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X1250
- ✓ 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 SI80X1250 FAQ
Yes, the AirTAC SI80X1250 is discontinued. The direct replacement is the SAI80X1250. It shares the identical ISO 15552 mounting interface, 80mm bore, 1250mm stroke, 513kgf max force, and G3/8 port, so it drops directly into existing fixtures.
The 80mm bore uses a G3/8 port and M20x1.5 rod thread. 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. Operating speed is 30-800mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80X1250
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X1250 replacement — usually within 7-8 hours.