This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI125X10FA, 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 SI125X10FA
The AirTAC SI125 Standard Cylinder SI125X10FA is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 10mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI125X10FA, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke10 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAI125X10FA
- 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 SI125X10FA
The AirTAC SI125X10FA is a discontinued double-acting ISO 15552 profile cylinder with an FA flange mount and a 10 mm stroke. Built for heavy-duty thrust, it delivers 6136 N push force at 0.5 MPa. AirTAC replaced this legacy unit with the SAI125X10FA, a direct upgrade retaining the exact 125 mm bore, stroke, G1/2 port, and ISO 15552 mounting interface.
The SAI replacement features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. Because this specific SI SKU lacks a magnet (-S), it cannot accept position sensors.
Airtac SI125 Standard Cylinder SI125X10FA Technical Specifications
| Model | Airtac SI125 Standard Cylinder SI125X10FA |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI125X10FA |
| Bore size | Ø125 mm |
| Stroke | 10 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 SAI125X10FA 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 SAI125X10FA 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 SI125X10FA
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×10 | 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 SI125X10FA Is Used
Heavy-Duty Clamping
Generates 6136 N of thrust at 0.5 MPa to secure large castings or heavy weldments during machining operations.
Short-Stroke Pressing
The 10 mm stroke provides high-impact force for seating bearings, pins, or rivets in automated assembly lines.
Industrial Ejection
Delivers robust push force to eject dense molded parts or compacted scrap from heavy machinery tooling.
Replacing the Airtac SI125 Standard Cylinder SI125X10FA with the SAI125X10FA
To replace the discontinued SI125X10FA, order the SAI125X10FA. Verify the FA flange interface, 125 mm bore, 10 mm stroke, and G1/2 port. This unit has no magnet, so it cannot support CS1-B/DS1-B sensors; order an SAI variant with the S suffix if sensing is needed. Sizing down, an 80 mm bore yields 2513 N push at 0.5 MPa; sizing up, a 160 mm bore provides 10053 N. Note that a plain cylinder drifts on air loss—the cushion only decelerates. For load holding, use an external pilot check valve or explore the SAIL or BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI125X10FA
- ✓ 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 SI125X10FA FAQ
Yes, the AirTAC SI125X10FA is discontinued. The direct replacement is the SAI125X10FA. It shares the identical ISO 15552 FA flange mounting interface, 125 mm bore, 10 mm stroke, output force, and G1/2 port size, fitting existing fixtures perfectly.
This double-acting cylinder features a G1/2 air port. At 0.5 MPa it provides 6136 N push and 5734 pull force. At 0.7 MPa push is 8590 N, and at 0.9 MPa it is 11045 N. The theoretical maximum force is 1251 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI125X10FA
Send us the quantity and destination. We confirm price, stock and lead time on the SAI125X10FA replacement — usually within 7-8 hours.