This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI125X470S, 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 SI125X470S
The AirTAC SI125 Standard Cylinder SI125X470S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 470mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI125X470S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke470 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAI125X470S
- 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 SI125X470S
The AirTAC SI125X470S is a discontinued double-acting ISO 15552 profile cylinder with a 125 mm bore and 470 mm stroke. It delivers a push force of 6136 N and pull of 5734 N at 0.5 MPa, utilizing a G1/2 port and M27x2 rod thread. AirTAC replaced this legacy unit with the SAI125X470S, a direct upgrade retaining the exact ISO 15552 mounting interface, bore, stroke, and output force.
The SAI replacement features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. The SAI family also introduces SAIL, SAIF, and BSAI lock variants absent in the SI line, and this -S model's magnet works with legacy CS1-B/DS1-B sensors.
Airtac SI125 Standard Cylinder SI125X470S Technical Specifications
| Model | Airtac SI125 Standard Cylinder SI125X470S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI125X470S |
| Bore size | Ø125 mm |
| Stroke | 470 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 SAI125X470S 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 SAI125X470S 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 SI125X470S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×470 | 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 SI125X470S Is Used
Heavy Stamping Press
Drives large platens and heavy tooling in automated stamping lines, utilizing the 6136 N push force to form thick metal components reliably.
Pallet Dispenser
Actuates large pallet handling mechanisms in high-throughput logistics hubs, where the 470 mm stroke provides the reach needed to push heavy loads.
Large Mold Clamping
Secures oversized injection molds or heavy industrial fixtures, taking advantage of the 125 mm bore's robust pull force and stable ISO 15552 profile.
Replacing the Airtac SI125 Standard Cylinder SI125X470S with the SAI125X470S
To replace the SI125X470S, order the SAI125X470S. Confirm the ISO 15552 mounting fixture, 125 mm bore, 470 mm stroke, G1/2 port, and the -S magnet requirement. If sizing up or down, neighboring bores (100 mm or 160 mm) offer different force classes; this 125 mm bore provides 6136 N push at 0.5 MPa. Because the 470 mm stroke is long, use external guides to prevent rod bending and side-load wear. A plain cylinder does not hold load without live air—the cushion only decelerates. For load holding on air loss, specify the SAIL or BSAI lock variant, or use an external pilot check valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI125X470S
- ✓ 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 SI125X470S FAQ
Yes, the SI125X470S is discontinued. The direct replacement is the AirTAC SAI125X470S. It features the same ISO 15552 mounting interface, 125 mm bore, 470 mm stroke, output force, and G1/2 port, fitting existing fixtures perfectly while upgrading the piston seal.
This double-acting cylinder has a G1/2 port. The force ratings are: 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. The operating speed range is 30-500 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI125X470S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI125X470S replacement — usually within 7-8 hours.