This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI125X110FA, 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 SI125X110FA
The AirTAC Airtac SI125 Standard Cylinder SI125X110FA 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 SAI125X110FA, 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 → SAI125X110FA
- 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 SI125X110FA
The AirTAC SI125X110FA is a discontinued double-acting ISO 15552 profile cylinder with a 125 mm bore and 110 mm stroke. It delivers 6136 N push force at 0.5 MPa via a G1/2 port. The direct replacement is the SAI125X110FA, matching the exact bore, stroke, force, port and FA flange mounting interface.
The SAI upgrade features a modernized piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. For load holding, note that a standard cylinder drifts on air loss—the cushion only decelerates near stroke ends. This non-magnet SKU cannot accept a sensor.
Airtac SI125 Standard Cylinder SI125X110FA Technical Specifications
| Model | Airtac SI125 Standard Cylinder SI125X110FA |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI125X110FA |
| 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 SAI125X110FA 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 SAI125X110FA 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 SI125X110FA
| 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 SI125X110FA Is Used
Heavy Press Operations
Drives forming and stamping presses requiring up to 6136 N of push force at 0.5 MPa, utilizing the 110 mm stroke for rapid, high-impact actuation.
Large Mold Clamping
Secures heavy industrial molds on production lines. The FA flange mount handles the 125 mm bore's substantial thrust, ensuring rigid fixture alignment.
Pallet Diversion
Pushes loaded pallets onto secondary conveyor tracks. The 110 mm stroke provides the precise displacement needed for heavy material routing.
Replacing the Airtac SI125 Standard Cylinder SI125X110FA with the SAI125X110FA
To replace the discontinued SI125X110FA, order the SAI125X110FA. Verify the ISO 15552 FA flange interface, 110 mm stroke, and G1/2 port. Because this SKU lacks the -S magnet, it cannot support CS1-B/DS1-B sensors; order a magnet-equipped version if position sensing is required. The 125 mm bore yields 6136 N push at 0.5 MPa; if less force is needed, an 80 mm bore provides 2513 N, while a 160 mm bore offers 10053 N. For loads needing static holding on air loss, use an external pilot check valve, rod lock, or the SAIL/BSAI lock variants—the cushion only decelerates, it does not lock. Since the stroke is under 300 mm, rod bending is minimal, but ensure the FA flange bolts are torqued to handle the 8590 N output at 0.7 MPa.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI125X110FA
- ✓ 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 SI125X110FA FAQ
Yes, the SI125X110FA is discontinued. The direct replacement is the SAI125X110FA. It is dimensionally interchangeable per ISO 15552, retaining the same 125 mm bore, 110 mm stroke, G1/2 port, and FA flange mounting interface.
The G1/2 port feeds a 32 mm rod. Force output is 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 maximum theoretical force of 1251 kgf at 1.0 MPa. Operating speed is 30-500 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI125X110FA
Send us the quantity and destination. We confirm price, stock and lead time on the SAI125X110FA replacement — usually within 7-8 hours.