This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI125AX160, 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 SI125 Standard Cylinder SI125AX160
The AirTAC SI125 Standard Cylinder SI125AX160 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 160mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI125AX160, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke160 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAI125AX160
- 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 SI125 Standard Cylinder SI125AX160
The AirTAC SI125AX160 is a discontinued double-acting ISO 15552 profile cylinder with a 125 mm bore and 160 mm stroke. It delivers 6136 N push force at 0.5 MPa through a G1/2 port. The direct replacement is the SAI125AX160, which matches the original ISO 15552 mounting interface, stroke, force and accessories exactly.
This SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and long life. The SI125AX160 features a SUS420J2 stainless steel rod (A option) and lacks a magnet, meaning it cannot accept position sensors.
Airtac SI125 Standard Cylinder SI125AX160 Technical Specifications
| Model | Airtac SI125 Standard Cylinder SI125AX160 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI125AX160 |
| Bore size | Ø125 mm |
| Stroke | 160 mm |
| Acting type | Double acting |
| Port size | G1/2 |
| Rod thread | M27×2.0 |
| 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 – 500 mm/s |
| Cushion | Adjustable, 40 mm |
| Max standard stroke | Up to 1500 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The SAI125AX160 carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø125mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 6136 N | 5734 N |
| 0.7 MPa | 8590 N | — |
| Max (@1.0 MPa) | 1251 kgf | |
The SAI125AX160 produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SI125 Standard Cylinder SI125AX160
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×160 | 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 SI125 Standard Cylinder SI125AX160 Is Used
Heavy-Duty Pressing
Drives large stamping or forming dies using 6136 N of thrust at 0.5 MPa, utilizing the 160 mm stroke to cycle robust tooling.
Pallet Dispensing
Actuates heavy pallet handling gates and lifts where the 125 mm bore provides the necessary force to move loaded assemblies smoothly.
Automated Clamping
Secures large fabricated components during machining or welding, relying on the 32 mm SUS420J2 stainless rod for corrosion resistance.
Replacing the Airtac SI125 Standard Cylinder SI125AX160 with the SAI125AX160
To replace the SI125AX160, order the SAI125AX160. Verify your ISO 15552 mounting hardware (LB, FA, CA, TC), the G1/2 air port, and the M27x2 rod thread. Because this SKU lacks the -S magnet, it cannot support legacy CS1-B/DS1-B switches; order a magnet-equipped SAI if sensing is required. Sizing down, an 80 mm bore yields 2513 N push at 0.5 MPa; sizing up, a 160 mm bore provides 10053 N. Note that a plain 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 → SAI125AX160
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SI125 Standard Cylinder SI125AX160 FAQ
Yes, the AirTAC SI125AX160 is discontinued. The direct replacement is the SAI125AX160. It is dimensionally interchangeable per ISO 15552, retaining the same 125 mm bore, 160 mm stroke, G1/2 port, and mounting interface.
The G1/2 port feeds a 125 mm bore that generates 6136 N push and 5734 N pull at 0.5 MPa, 8590 N push at 0.7 MPa, 11045 N push at 0.9 MPa, and a theoretical max of 1251 kgf at 1.0 MPa. Operating speed is 30-500 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI125AX160
Send us the quantity and destination. We confirm price, stock and lead time on the SAI125AX160 replacement — usually within 7-8 hours.