This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI125AX95, 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 SI125AX95
The AirTAC SI125 Standard Cylinder SI125AX95 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 SAI125AX95, 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 → SAI125AX95
- 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 SI125AX95
The AirTAC SI125AX95 is a discontinued double-acting ISO 15552 profile cylinder with a 125mm bore and 95mm stroke, delivering 6136N push force at 0.5MPa through a G1/2 port. This legacy unit is replaced by the SAI125AX95 direct.
The SAI125AX95 maintains identical ISO 15552 mounting, force, and port specs, but adds an upgraded two Y-shaped piston seal for low start-up pressure. This SKU lacks a magnet and cannot take a sensor. The -A rod is SUS420J2 stainless. For load holding, use SAIL or BSAI lock variants.
Airtac SI125 Standard Cylinder SI125AX95 Technical Specifications
| Model | Airtac SI125 Standard Cylinder SI125AX95 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI125AX95 |
| 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 SAI125AX95 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 SAI125AX95 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 SI125AX95
| 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 SI125AX95 Is Used
Heavy Press Operations
Drives high-tonnage forming and stamping presses where the 6136N push force at 0.5MPa is required to deform heavy materials.
Pallet Handling
Indexes loaded pallets on heavy-duty conveyors, utilizing the 125mm bore capacity to move substantial weights smoothly.
Large Mold Clamping
Secures oversized injection molds during setup, taking advantage of the SUS420J2 stainless rod for humid environments.
Replacing the Airtac SI125 Standard Cylinder SI125AX95 with the SAI125AX95
To replace the SI125AX95, order SAI125AX95 to retain the exact ISO 15552 interface, 95mm stroke, G1/2 port, and M27x2 thread. This SKU has no magnet, so it cannot accept CS1-B/DS1-B sensors; if sensing is needed, select an SAI with the -S option. The -A code specifies the SUS420J2 stainless rod for corrosion resistance instead of default carbon steel. For sizing, a 100mm bore yields 3927N push at 0.5MPa, while a 160mm bore yields 10053N. A plain cylinder drifts on air loss; for secure holding, specify the SAIL lock or BSAI clamp-lock variant, or use an external pilot check valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI125AX95
- ✓ 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 SI125AX95 FAQ
Yes, the SI125AX95 is discontinued. The direct replacement is the SAI125AX95. It shares the identical ISO 15552 mounting interface, 125mm bore, 95mm stroke, force, and G1/2 port, fitting existing fixtures perfectly.
It features a G1/2 port and provides 6136N push / 5734N pull at 0.5MPa, 8590N push at 0.7MPa, 11045N push at 0.9MPa, and a theoretical max of 1251kgf at 1.0MPa. Operating speed is 30-500mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI125AX95
Send us the quantity and destination. We confirm price, stock and lead time on the SAI125AX95 replacement — usually within 7-8 hours.