This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI125X160FA, 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 SI125X160FA
The AirTAC SI125 Standard Cylinder SI125X160FA is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 160mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI125X160FA, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke160 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAI125X160FA
- 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 SI125X160FA
The AirTAC SI125X160FA is a discontinued double-acting ISO 15552 profile cylinder with an FA flange mounting interface. Built with an extruded aluminum barrel, it delivers 6136 N push force at 0.5 MPa and features a G1/2 port, M27x2 rod thread, and 40 mm adjustable air cushions. This legacy unit cannot support a magnetic sensor because it lacks the -S magnet option.
You must order the direct replacement SAI125X160FA to maintain existing fixtures. It shares the exact ISO 15552 dimensions, 160 mm stroke, and port size, but adds an upgraded piston seal with two Y-shaped one-way elements for lower start-up pressure.
Airtac SI125 Standard Cylinder SI125X160FA Technical Specifications
| Model | Airtac SI125 Standard Cylinder SI125X160FA |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI125X160FA |
| Bore size | Ø125 mm |
| Stroke | 160 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 SAI125X160FA 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 SAI125X160FA 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 SI125X160FA
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×160 | 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 SI125X160FA Is Used
Heavy Press Clamping
Applies the 6136 N push force at 0.5 MPa to secure heavy sheet metal or composite parts in automated stamping and forming stations.
Large Mold Ejection
Ejects dense injection molds or cast components using the FA flange mount to withstand high axial impact during retraction.
Replacing the Airtac SI125 Standard Cylinder SI125X160FA with the SAI125X160FA
To replace this SI125X160FA, specify the SAI125X160FA and confirm the ISO 15552 FA flange interface, 125 mm bore, 160 mm stroke, G1/2 port, and double-acting operation. Because this SKU lacks the -S magnet, it cannot accept position sensors; order the -S variant if you need CS1-B/DS1-B switches. If you need to upsize or downsize, neighboring bores offer different force classes, with this 125 mm bore providing 8590 N at 0.7 MPa. A plain cylinder drifts on air loss—the cushion only decelerates—so use an external pilot check valve or the SAIL/BSAI lock variant for load holding. At 160 mm stroke, rod bending stress is low, but always guide the load to prevent side-load damage.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI125X160FA
- ✓ 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 SI125X160FA FAQ
Yes, the SI125X160FA is discontinued. The direct replacement is the SAI125X160FA. It is dimensionally interchangeable per ISO 15552, retaining the same FA flange, 125 mm bore, 160 mm stroke, G1/2 port, and 6136 N output force.
This double-acting cylinder uses 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 SAI125X160FA
Send us the quantity and destination. We confirm price, stock and lead time on the SAI125X160FA replacement — usually within 7-8 hours.