This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X125FA, 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 SI80X125FA
The AirTAC SI80 Standard Air Cylinder SI80X125FA 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 SAI80X125FA, 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 → SAI80X125FA
- 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 SI80X125FA
The AirTAC SI80X125FA is a discontinued double-acting ISO 15552 profile cylinder with an 80mm bore and 125mm stroke. It delivers 2513N push and 2268N pull at 0.5MPa, utilizing a G3/8 port and M20x1.5 rod thread. Because this SI unit is end-of-life, you should order the SAI80X125FA direct replacement. It shares the exact ISO 15552 mounting interface, FA flange, force, and stroke, fitting existing fixtures perfectly.
The SAI upgrade introduces a refined piston seal with two Y-shaped one-way elements for lower start-up pressure and longer life. Note this specific SKU lacks a magnet (-S) and cannot accept a sensor. If high temperatures up to 150C are needed, specify the Viton H seal option.
Airtac SI80 Standard Air Cylinder SI80X125FA Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X125FA |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X125FA |
| 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 SAI80X125FA 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 SAI80X125FA 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 SI80X125FA
| 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 SI80X125FA Is Used
Press Fit Assembly
Drives bearings or pins into housings, using the 125mm stroke and 2513N push force at 0.5MPa for reliable mid-force insertion tasks.
Pallet Diversion
Actuates heavy diverting arms or pop-up stops on conveyor lines, leveraging the robust 80mm profile barrel and FA flange mount.
Carton Flap Folding
Folds heavy corrugated carton flaps prior to sealing, where the 2268N pull force handles return resistance effortlessly.
Replacing the Airtac SI80 Standard Air Cylinder SI80X125FA with the SAI80X125FA
To replace the SI80X125FA, order the SAI80X125FA. Confirm the ISO 15552 FA flange interface, 80mm bore, 125mm stroke, and G3/8 port (PT/G/NPT thread options). Because this SKU has no magnet, it cannot support position sensing; if you need switches, select an SAI80X125FAS and use current AirTAC sensors. Sizing both ways: a 63mm bore yields 1559N push at 0.5MPa, while a 100mm bore yields 3927N. Remember, a standard cylinder drifts without live air—the cushion only decelerates. For load holding, use an external pilot check valve or explore the SAIL or BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X125FA
- ✓ 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 SI80X125FA FAQ
Yes, the AirTAC SI80X125FA is discontinued. The direct replacement is the SAI80X125FA. It is a true ISO 15552 profile cylinder that matches the 80mm bore, 125mm stroke, 2513N force, G3/8 port, and FA flange interface, dropping directly into existing fixtures.
The 80mm bore features a G3/8 port, M20x1.5 rod thread, and 36mm cushions. It provides 2513N push and 2268N pull at 0.5MPa, 3518N push at 0.7MPa, 4523N push at 0.9MPa, and a theoretical max of 513 kgf at 1.0MPa. Operating speed is 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80X125FA
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X125FA replacement — usually within 7-8 hours.