This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI125X60FA, 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 SI125X60FA
The AirTAC Airtac SI125 Standard Cylinder SI125X60FA is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 60mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI125X60FA, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke60 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAI125X60FA
- 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 SI125X60FA
The AirTAC SI125X60FA is a discontinued double-acting ISO 15552 profile cylinder with a 125 mm bore and 60 mm stroke. Delivering 6136 N push force at 0.5 MPa, it is replaced by the SAI125X60FA direct. The SAI features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure, while keeping the G1/2 port, M27x2 rod thread, and FA flange interface unchanged.
Because this SKU lacks the -S magnet, it cannot accept a position switch. Note the SAI family adds SAIL, SAIF, and BSAI lock variants the SI line lacked.
Airtac SI125 Standard Cylinder SI125X60FA Technical Specifications
| Model | Airtac SI125 Standard Cylinder SI125X60FA |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI125X60FA |
| Bore size | Ø125 mm |
| Stroke | 60 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 SAI125X60FA 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 SAI125X60FA 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 SI125X60FA
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×60 | 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 SI125X60FA Is Used
Heavy Press Clamping
Secures large molds and heavy fixtures in automated stamping lines, utilizing the 6136 N push force to lock components rigidly during high-vibration operations.
Pallet Lift Gates
Drives robust lifting arms in conveyor transfer systems, moving loads safely under the 3682 N safe working threshold with smooth end-of-stroke cushioning.
Injection Mold Ejection
Provides steady ejection thrust for thick-walled plastic parts, relying on the 125 mm bore's 1251 kgf max theoretical output to clear heavy molds reliably.
Replacing the Airtac SI125 Standard Cylinder SI125X60FA with the SAI125X60FA
To replace the SI125X60FA, order the SAI125X60FA direct, confirming the ISO 15552 FA flange interface, 60 mm stroke, and G1/2 port (PT/G/NPT). This non-magnetic SKU cannot take a sensor; if sensing is needed, specify an SAI with the -S magnet for CS1-B/DS1-B or current AirTAC switches. For force context, the 125 mm bore yields 6136 N push at 0.5 MPa; a neighbouring 100 mm bore yields 3927 N. The 40 mm cushions decelerate loads, but a plain cylinder drifts on air loss—for load holding, use the SAIL or BSAI lock variant, or an external pilot check valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI125X60FA
- ✓ 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 SI125X60FA FAQ
Yes, the SI125X60FA is discontinued. The direct replacement is the SAI125X60FA. It is dimensionally interchangeable per the ISO 15552 mounting interface, retaining the same 125 mm bore, 60 mm stroke, force, G1/2 port, and FA flange mount.
The 125 mm bore uses a G1/2 port. 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 theoretical maximum of 1251 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI125X60FA
Send us the quantity and destination. We confirm price, stock and lead time on the SAI125X60FA replacement — usually within 7-8 hours.