This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI125AX230, 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 SI125AX230
The AirTAC SI125 Standard Cylinder SI125AX230 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 230mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI125AX230, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke230 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAI125AX230
- 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 SI125AX230
The AirTAC SI125AX230 is a discontinued double-acting ISO 15552 profile cylinder with a 125 mm bore and 230 mm stroke. It delivers 6136 N push force at 0.5 MPa through a G1/2 port. AirTAC replaced this legacy unit with the SAI125AX230, a direct upgrade retaining the exact ISO 15552 mounting interface, bore, stroke, output force, and port size.
The SAI125AX230 features an upgraded piston seal using two Y-shaped one-way elements for low start-up pressure and long life. This SKU uses a SUS420J2 stainless piston rod (the -A option) but lacks a magnet, so it cannot accept CS1-B/DS1-B switches.
Airtac SI125 Standard Cylinder SI125AX230 Technical Specifications
| Model | Airtac SI125 Standard Cylinder SI125AX230 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI125AX230 |
| Bore size | Ø125 mm |
| Stroke | 230 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 SAI125AX230 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 SAI125AX230 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 SI125AX230
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×230 | 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 SI125AX230 Is Used
Heavy Pressing
Drives large stamping and forming presses requiring up to 6136 N of thrust at 0.5 MPa.
Pallet Handling
Indexes heavy loaded pallets along conveyors using the robust 32 mm piston rod.
Clamping Fixtures
Secures large machined components during CNC milling with reliable 230 mm travel.
Replacing the Airtac SI125 Standard Cylinder SI125AX230 with the SAI125AX230
To replace the discontinued SI125AX230, order the SAI125AX230. Verify the ISO 15552 mounting interface, the 230 mm stroke, the G1/2 port, and your specific mounting accessory. Because this SKU lacks a magnet (-S), it cannot support position sensing; if you need switches, specify a magnet on the new SAI order. For sizing, the 125 mm bore yields 6136 N push at 0.5 MPa; if less force is needed, an 80 mm bore gives 2513 N, while a 160 mm bore offers 10053 N. A plain cylinder drifts on air loss—the cushion only decelerates—so use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant for load holding. At 230 mm stroke, side-load risks are low, but ensure guide alignment to prevent rod bending.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI125AX230
- ✓ 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 SI125AX230 FAQ
Yes, the AirTAC SI125AX230 is discontinued. The direct replacement is the SAI125AX230. It shares the identical ISO 15552 mounting interface, 125 mm bore, 230 mm stroke, output force, and G1/2 port, fitting existing fixtures perfectly.
This 125 mm bore cylinder uses a G1/2 air port. It delivers 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 SAI125AX230
Send us the quantity and destination. We confirm price, stock and lead time on the SAI125AX230 replacement — usually within 7-8 hours.