This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI125X700N, 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 SI125X700N
The AirTAC SI125 Standard Cylinder SI125X700N is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 700mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI125X700N, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke700 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAI125X700N
- 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 SI125X700N
The AirTAC SI125X700N is a discontinued double-acting ISO 15552 profile cylinder with a 125mm bore and 700mm stroke. It delivers 6136N push force at 0.5MPa via a G1/2 port. The direct replacement is the SAI125X700N, matching the interface, force, and mounting.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure. This SKU lacks a magnet and cannot take a sensor. The NBR seal suits -20 to +70C; Viton H extends this to 150C.
Airtac SI125 Standard Cylinder SI125X700N Technical Specifications
| Model | Airtac SI125 Standard Cylinder SI125X700N |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI125X700N |
| Bore size | Ø125 mm |
| Stroke | 700 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 SAI125X700N 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 SAI125X700N 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 SI125X700N
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×700 | 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 SI125X700N Is Used
Heavy Stamping Press
Drives large tooling dies with 6136N thrust at 0.5MPa, utilizing the 700mm stroke for deep-draw operations.
Bulk Material Diverter
Actuates heavy flow gates over long distances, requiring external guides to support the 700mm extended rod.
Replacing the Airtac SI125 Standard Cylinder SI125X700N with the SAI125X700N
To replace the SI125X700N, order the SAI125X700N. Confirm the ISO 15552 mounting interface (LB, FA, CA, TC), 125mm bore, 700mm stroke, G1/2 port, and M27x2 rod thread. Because this is a non-magnet SKU, it cannot accept CS1-B/DS1-B sensors. For sizing, the 125mm bore yields 6136N push at 0.5MPa; dropping to an 80mm bore gives 2513N. At 700mm stroke, use external guides to prevent rod bending and side-load damage. This cylinder does not hold load on air loss; use an external rod lock, pilot check valve, or SAIL/BSAI lock variant for secure holding.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI125X700N
- ✓ 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 SI125X700N FAQ
Yes, the SI125X700N is discontinued. The direct replacement is the AirTAC SAI125X700N. It is dimensionally interchangeable per ISO 15552, retaining the same 125mm bore, 700mm stroke, G1/2 port, and mounting fixtures.
It has a G1/2 port. Force ratings are: 6136N push and 5734N pull at 0.5MPa; 8590N push at 0.7MPa; 11045N push at 0.9MPa; with a theoretical maximum of 1251kgf at 1.0MPa. The speed range is 30-500mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI125X700N
Send us the quantity and destination. We confirm price, stock and lead time on the SAI125X700N replacement — usually within 7-8 hours.