This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X125S, 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 SI80X125S
The AirTAC SI80 Standard Air Cylinder SI80X125S 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 SAI80X125S, 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 → SAI80X125S
- 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 SI80X125S
The AirTAC SI80X125S is a discontinued double-acting ISO 15552 profile cylinder with an 80 mm bore and 125 mm stroke. It delivers 2513 N push force at 0.5 MPa through a G3/8 port. The direct replacement is the SAI80X125S, matching the exact ISO 15552 mounting interface, M20x1.5 rod thread, and 36 mm cushions.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and long life. The SAI family also adds SAIL and BSAI lock variants absent in the SI line. This -S SKU uses legacy CS1-B/DS1-B sensors.
Airtac SI80 Standard Air Cylinder SI80X125S Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X125S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X125S |
| 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 SAI80X125S 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 SAI80X125S 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 SI80X125S
| 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 SI80X125S Is Used
Press Fit Assembly
Applies 2513 N at 0.5 MPa to seat bearings and pins in automated machining lines, utilizing the 125 mm stroke for compact press cycles.
Package Diversion
Drives heavy-duty sorting arms on conveyor belts, using the G3/8 port and 30-800 mm/s speed range to rapidly redirect dense goods.
Pallet Lift Gates
Actuates 128 kg vertical lift gates in material handling hubs, benefiting from the ISO 15552 profile barrel for rigid fixture mounting.
Replacing the Airtac SI80 Standard Air Cylinder SI80X125S with the SAI80X125S
To replace the SI80X125S, order the SAI80X125S and confirm the ISO 15552 mounting interface, 80 mm bore, 125 mm stroke, G3/8 port, and your specific mounting accessory (like FA flange or TC trunnion). The -S suffix means a piston magnet is present for CS1-B/DS1-B switches; the SAI equivalent uses current AirTAC sensors. If sizing alternatives, neighboring bores (63 mm or 100 mm) change the 0.5 MPa push force (1559 N or 3927 N). Note that a standard cylinder drifts on air loss because the 36 mm adjustable cushion only decelerates near stroke end. For load holding, specify the SAIL or BSAI lock variant, or use an external pilot check valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X125S
- ✓ 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 SI80X125S FAQ
Yes, the SI80X125S is discontinued. The direct replacement is the SAI80X125S. It shares the identical ISO 15552 mounting interface, 80 mm bore, 125 mm stroke, output force, G3/8 port, and accessories, fitting existing fixtures perfectly.
The 80 mm bore uses a G3/8 port and features a 25 mm rod. It delivers 2513 N push and 2268 N pull at 0.5 MPa, 3518 N push at 0.7 MPa, and a theoretical maximum of 513 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80X125S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X125S replacement — usually within 7-8 hours.