This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI125BX110, 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 SI125BX110
The AirTAC SI125 Standard Cylinder SI125BX110 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 110mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI125BX110, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke110 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAI125BX110
- 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 SI125BX110
The AirTAC SI125BX110 is a discontinued double-acting ISO 15552 profile cylinder with a 125 mm bore, 110 mm stroke, and SUS304 stainless steel rod. Delivering 6136 N push force at 0.5 MPa, it is replaced by the SAI125BX110. This direct upgrade shares the same G1/2 port, M27x2 thread, and ISO 15552 mounting interface.
The SAI features an upgraded two Y-shaped piston seal for low start-up pressure. With no magnet, this SKU cannot take a sensor. For load holding, use SAIL or BSAI lock variants.
Airtac SI125 Standard Cylinder SI125BX110 Technical Specifications
| Model | Airtac SI125 Standard Cylinder SI125BX110 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI125BX110 |
| Bore size | Ø125 mm |
| Stroke | 110 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 SAI125BX110 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 SAI125BX110 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 SI125BX110
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×110 | 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 SI125BX110 Is Used
Heavy-Duty Pressing
Drives large stamping and forming operations requiring up to 6136 N of thrust at 0.5 MPa.
Pallet Handling
Shifts heavy loaded pallets on conveyors where the 125 mm bore and 110 mm stroke provide robust actuation.
Automated Clamping
Secures large workpieces in machining centers, utilizing the SUS304 rod for corrosion resistance.
Replacing the Airtac SI125 Standard Cylinder SI125BX110 with the SAI125BX110
To replace the SI125BX110, order the SAI125BX110. Verify the ISO 15552 mounting interface, G1/2 port, and M27x2 thread. This non-magnet SKU cannot accept a sensor; order an SAI with -S if you need CS1-B/DS1-B switches. For sizing, a 100 mm bore gives 3927 N at 0.5 MPa, while a 160 mm bore gives 10053 N. The cushion only decelerates; for load holding on air loss, use an external rod lock or the SAIL/BSAI variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI125BX110
- ✓ 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 SI125BX110 FAQ
Yes, the AirTAC SI125BX110 is discontinued. The direct replacement is the SAI125BX110, which shares the same ISO 15552 mounting interface, 125 mm bore, 110 mm stroke, force, and G1/2 port.
It has a G1/2 port. Theoretical forces are 6136 N push and 5734 N pull at 0.5 MPa, 8590 N push at 0.7 MPa, 11045 N at 0.9 MPa, and a maximum of 1251 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI125BX110
Send us the quantity and destination. We confirm price, stock and lead time on the SAI125BX110 replacement — usually within 7-8 hours.