This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X125N, 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 SI80X125N
The AirTAC SI80 Standard Air Cylinder SI80X125N 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 SAI80X125N, 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 → SAI80X125N
- 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 SI80X125N
The AirTAC SI80X125N is a discontinued double-acting ISO 15552 profile cylinder with an 80 mm bore and 125 mm stroke. It delivers 2513 N push and 2268 N pull at 0.5 MPa, using a G3/8 port. The direct replacement is the SAI80X125N, which matches the exact ISO 15552 mounting interface, bore, stroke, force, port and accessories. The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. This NBR-sealed SKU (-N) runs at -20 to +70 C; a Viton H option raises heat resistance to 150 C.
Because this non-magnetic SKU lacks a -S suffix, it cannot take a sensor. For load holding, remember the air cushion only decelerates; use an external rod lock or pilot check valve to prevent drift.
Airtac SI80 Standard Air Cylinder SI80X125N Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X125N |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X125N |
| 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 SAI80X125N 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 SAI80X125N 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 SI80X125N
| 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 SI80X125N Is Used
Press Fit Assembly
Drives bearings and bushings into housings using its 2513 N push force at 0.5 MPa, ensuring consistent seating in automated machining cells.
Pallet Diverting
Actuates heavy transfer rails and diverters on packaging lines, relying on the 80 mm bore to overcome guide friction and move loaded pallets.
Carton Flap Folding
Folds heavy cardboard flaps prior to sealing in high-speed logistics hubs, where the 125 mm stroke provides the exact travel needed.
Replacing the Airtac SI80 Standard Air Cylinder SI80X125N with the SAI80X125N
To replace the SI80X125N, order the SAI80X125N and confirm the ISO 15552 interface, 80 mm bore, 125 mm stroke, G3/8 port (PT/G/NPT thread options), and mounting accessory (LB, FA, CA, TC, etc.). This SKU has no -S magnet, so it cannot accept CS1-B/DS1-B switches; if sensing is needed, select an SAI model with the S suffix. Sizing both ways: the 80 mm bore gives 2513 N push at 0.5 MPa, while the neighbouring 63 mm bore offers 1559 N. If you need to hold a load without live air, the cushion will not lock the piston—consider the SAIL or BSAI lock variants, or an external pilot check valve. At 125 mm stroke, side-load is minimal, but always guide the rod to prevent bending.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X125N
- ✓ 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 SI80X125N FAQ
Yes, the SI80X125N is discontinued. The direct replacement is the SAI80X125N. It shares the same ISO 15552 mounting interface, 80 mm bore, 125 mm stroke, output force, G3/8 port, and mounting accessories, fitting existing fixtures perfectly.
The 80 mm bore cylinder uses a G3/8 port and a 25mm rod with an M20x1.5 thread. It provides 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 SAI80X125N
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X125N replacement — usually within 7-8 hours.