This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI125X230, 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 SI125X230
The AirTAC SI125 Standard Cylinder SI125X230 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 SAI125X230, 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 → SAI125X230
- 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 SI125X230
The AirTAC SI125X230 is a discontinued double-acting ISO 15552 profile cylinder, delivering 6136 N push force at 0.5 MPa through a 125 mm bore and 230 mm stroke. It features a 32 mm carbon steel rod, M27x2 thread, 40 mm adjustable cushions, and a G1/2 port. This SKU lacks a magnet, so it cannot accept position switches.
Order the direct replacement SAI125X230 instead. It shares the exact ISO 15552 mounting interface, bore, stroke, force, and port. The SAI upgrades the piston seal to two Y-shaped one-way elements for lower start-up pressure, and adds SAIL or BSAI lock variants the SI lacked.
Airtac SI125 Standard Cylinder SI125X230 Technical Specifications
| Model | Airtac SI125 Standard Cylinder SI125X230 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI125X230 |
| 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 SAI125X230 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 SAI125X230 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 SI125X230
| 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 SI125X230 Is Used
Heavy Stamping Press
Drives large heavy-duty stamping dies requiring 6136 N push force at 0.5 MPa, utilizing the 230 mm stroke to form thick metal components.
Pallet Positioning
Shifts loaded pallets laterally on high-capacity conveyors, moving substantial weights safely within the 3682 N working load limit.
Large Mold Clamping
Secures oversized industrial molds and fixtures, providing rigid holding power up to the 1251 kgf maximum theoretical force at 1.0 MPa.
Replacing the Airtac SI125 Standard Cylinder SI125X230 with the SAI125X230
To replace the SI125X230, order the SAI125X230, confirming the ISO 15552 interface, 230 mm stroke, G1/2 port (PT/G/NPT), and mounting accessory. Since this is a non-magnet SKU, it cannot support CS1-B/DS1-B sensors; specify an -S SAI if sensing is needed. For sizing, a 100 mm bore yields 3927 N push at 0.5 MPa, while a 160 mm bore yields 10053 N. Note that a plain cylinder drifts on air loss—the cushion only decelerates. For load holding, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variants. With a 230 mm stroke, ensure guide alignment to prevent rod bending and side-load wear.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI125X230
- ✓ 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 SI125X230 FAQ
Yes, the SI125X230 is discontinued. The direct replacement is the AirTAC SAI125X230. It is dimensionally interchangeable per ISO 15552, retaining the same 125 mm bore, 230 mm stroke, output force, G1/2 port, and mounting interface.
The G1/2 port feeds a 32 mm rod yielding 6136 N push and 5734 N pull at 0.5 MPa. At 0.7 MPa push is 8590 N, and 11045 N at 0.9 MPa. The theoretical max force is 1251 kgf at 1.0 MPa, operating at 30-500 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI125X230
Send us the quantity and destination. We confirm price, stock and lead time on the SAI125X230 replacement — usually within 7-8 hours.