This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI125X1400, 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 SI125X1400
The AirTAC SI125 Standard Cylinder SI125X1400 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 1400mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI125X1400, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke1400 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAI125X1400
- 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 SI125X1400
The AirTAC SI125X1400 is a discontinued double-acting ISO 15552 profile cylinder with a 125mm bore and 1400mm stroke. It delivers 6136N push force at 0.5MPa through a G1/2 port. The direct replacement is the SAI125X1400, which shares identical mounting, stroke, and force specs. This SKU lacks a magnet and cannot accept position sensors.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and longevity. It also adds lock variants the SI lacked, like SAIL and BSAI. For high heat, Viton H seals raise the temperature limit to 150 C.
Airtac SI125 Standard Cylinder SI125X1400 Technical Specifications
| Model | Airtac SI125 Standard Cylinder SI125X1400 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI125X1400 |
| Bore size | Ø125 mm |
| Stroke | 1400 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 SAI125X1400 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 SAI125X1400 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 SI125X1400
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×1400 | 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 SI125X1400 Is Used
Long-Stroke Material Transfer
Pushes heavy pallets or workpieces across extended machine beds using its 6136N thrust at 0.5 MPa over a 1400mm travel distance.
Automated Storage Retrieval
Acts as a main extraction or insertion ram in large-scale automated warehousing, requiring external guides to manage the 1400mm rod extension safely.
Heavy Assembly Line Indexing
Indexes substantial fixtures or automotive sub-assemblies between stations, relying on the 125mm bore's 5734N pull force to retract the load.
Replacing the Airtac SI125 Standard Cylinder SI125X1400 with the SAI125X1400
To replace this SI125X1400, order the SAI125X1400. Verify the ISO 15552 mounting interface, the 1400mm stroke, the G1/2 port, and your specific mounting accessory (like TC trunnion or LB foot). Because this specific SKU has no -S magnet, it cannot support legacy CS1-B/DS1-B sensors; order an -S version if sensing is needed. At 1400mm, this long stroke demands external guides to prevent rod bending and severe side loads. For sizing both ways: a 100mm bore gives 3927N [email protected], while a 160mm bore yields 10053N. Note that a standard cylinder drifts without live air; for load holding, use an external pilot check valve or the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI125X1400
- ✓ 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 SI125X1400 FAQ
Yes, the SI125X1400 is discontinued. The direct replacement is the AirTAC SAI125X1400. It is dimensionally interchangeable per the ISO 15552 mounting interface, maintaining the same 125mm bore, 1400mm stroke, output force, G1/2 port, and mounting accessories. You simply order the SAI equivalent for a direct fixture fit.
At 0.5 MPa it provides 6136N push and 5734N pull. At 0.7 MPa push is 8590N, and at 0.9 MPa it is 11045N. The theoretical max force is 1251 kgf at 1.0 MPa. Operating pressure is 0.15-1.0 MPa, speed is 30-500 mm/s, and it uses a G1/2 port with a 32mm rod.
Related AirTAC SAI Cylinders
Request a Quote for the SAI125X1400
Send us the quantity and destination. We confirm price, stock and lead time on the SAI125X1400 replacement — usually within 7-8 hours.