This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI125X710S, 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 SI125X710S
The AirTAC SI125 Standard Cylinder SI125X710S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 710mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI125X710S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke710 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAI125X710S
- 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 SI125X710S
The AirTAC SI125X710S is a discontinued double-acting ISO 15552 profile cylinder featuring a 125mm bore and 710mm stroke. It delivers 6136N push force at 0.5MPa via a G1/2 port. AirTAC replaced this legacy unit with the SAI125X710S, a direct upgrade retaining the exact ISO 15552 mounting interface, bore, stroke, force, and port size.
The SAI replacement upgrades longevity with two Y-shaped one-way piston seals for low start-up pressure. The SAI family also introduces SAIL and BSAI lock variants absent in the SI line.
Airtac SI125 Standard Cylinder SI125X710S Technical Specifications
| Model | Airtac SI125 Standard Cylinder SI125X710S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI125X710S |
| Bore size | Ø125 mm |
| Stroke | 710 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 SAI125X710S 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 SAI125X710S 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 SI125X710S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×710 | 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 SI125X710S Is Used
Heavy Press Forming
Ideal for high-tonnage pressing operations requiring 6136N of thrust at 0.5MPa to form heavy-gauge materials.
Long-Reach Lowering
The 710mm stroke accommodates deep vertical descent tasks, provided external guides mitigate rod bending.
Pallet Dispensing
Robust 125mm bore output drives large mechanical arms to push or index heavy loaded pallets along conveyors.
Replacing the Airtac SI125 Standard Cylinder SI125X710S with the SAI125X710S
To replace the SI125X710S, order the SAI125X710S. Verify your ISO 15552 mounting hardware (LB, FA, or TC), the G1/2 air port, and the M27x2 rod thread. Because the -S suffix indicates a magnet, retain your CS1-B/DS1-B sensors, though the SAI body uses current AirTAC switches. For sizing alternatives, dropping to an 80mm bore yields 2513N push at 0.5MPa, while stepping up to 160mm provides 10053N. Note that a 710mm stroke demands external guides to prevent rod bending and side-load damage. Furthermore, this plain cylinder will drift on air loss; for load holding, specify the SAIL or BSAI lock variant, or use an external pilot check valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI125X710S
- ✓ 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 SI125X710S FAQ
Yes, the SI125X710S is discontinued. The direct replacement is the SAI125X710S. It shares the identical ISO 15552 mounting interface, 125mm bore, 710mm stroke, output force, and G1/2 port, fitting directly into existing fixtures.
At 0.5MPa, push force is 6136N and pull is 5734N. At 0.7MPa push is 8590N, and at 0.9MPa it is 11045N. The theoretical max force is 1251kgf at 1.0MPa. Operating speed is 30-500mm/s, and it uses a G1/2 port.
Related AirTAC SAI Cylinders
Request a Quote for the SAI125X710S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI125X710S replacement — usually within 7-8 hours.