This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI125BX95, 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 SI125BX95
The AirTAC Airtac SI125 Standard Cylinder SI125BX95 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 95mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI125BX95, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke95 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAI125BX95
- 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 SI125BX95
The AirTAC SI125BX95 is a discontinued double-acting ISO 15552 profile cylinder with a 125 mm bore and 95 mm stroke. Built with an extruded aluminum barrel, it delivers 6136 N push force at 0.5 MPa and features a SUS304 stainless steel piston rod for corrosion resistance. As this legacy unit is end-of-life, the direct replacement is the SAI125BX95, which matches the exact G1/2 port, M27x2 thread, and ISO 15552 mounting interface.
The SAI upgrade introduces an advanced piston seal utilizing two Y-shaped one-way elements for low start-up pressure and extended life. Note this specific SKU lacks a magnet, meaning it cannot accept CS1-B or DS1-B sensors.
Airtac SI125 Standard Cylinder SI125BX95 Technical Specifications
| Model | Airtac SI125 Standard Cylinder SI125BX95 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI125BX95 |
| Bore size | Ø125 mm |
| Stroke | 95 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 SAI125BX95 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 SAI125BX95 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 SI125BX95
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×95 | 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 SI125BX95 Is Used
Heavy Stamping Press
Drives large press dies requiring high thrust, using the 6136 N output at 0.5 MPa to form thick metal components reliably.
Wood Processing Clamp
Secures heavy timber beams during cutting operations, utilizing the SUS304 stainless rod to resist moisture and corrosive wood dust.
Replacing the Airtac SI125 Standard Cylinder SI125BX95 with the SAI125BX95
To replace the discontinued SI125BX95, order the SAI125BX95. Confirm the ISO 15552 mounting interface, 125 mm bore, 95 mm stroke, G1/2 port, and your specific mounting accessory (LB, FA, CA, TC, etc.). Because this is a no-S SKU, it cannot support magnetic sensing; if position detection is needed, select an SAI model with the -S magnet option. When sizing, the 125 mm bore yields 6136 N push at 0.5 MPa; dropping to an 80 mm bore reduces push to 2513 N, while increasing to 160 mm provides 10053 N. A plain cylinder will not hold a load if air pressure drops—the cushion only decelerates at stroke end. For secure load holding, consider an external pilot check valve or the SAIL/BSAI lock variants. The SAI family also offers the SAIF self-valve option, though only for bores 32-100.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI125BX95
- ✓ 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 SI125BX95 FAQ
Yes, the SI125BX95 is discontinued. The direct replacement is the SAI125BX95. It is dimensionally interchangeable per ISO 15552, retaining the same 125 mm bore, 95 mm stroke, output force, G1/2 port, and mounting interface to fit existing fixtures directly.
This 125 mm bore cylinder features a G1/2 air port and M27x2 rod thread. The thrust ratings are: 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 maximum force of 1251 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI125BX95
Send us the quantity and destination. We confirm price, stock and lead time on the SAI125BX95 replacement — usually within 7-8 hours.