This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI125X110, 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 SI125X110
The AirTAC SI125 Standard Cylinder SI125X110 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 110mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI125X110, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke110 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAI125X110
- 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 SI125X110
The AirTAC SI125X110 is a discontinued double-acting ISO 15552 profile cylinder. Delivering 6136 N push force at 0.5 MPa through a 125 mm bore, it is replaced by the SAI125X110 direct upgrade. The SAI maintains the exact G1/2 port, M27x2 thread, and 110 mm stroke. This non-magnet SKU cannot accept a sensor.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. The SAI family adds SAIL lock and BSAI clamp variants the SI lacked. For high heat, Viton H seals raise the -20 to +70 C range to 150 C.
Airtac SI125 Standard Cylinder SI125X110 Technical Specifications
| Model | Airtac SI125 Standard Cylinder SI125X110 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI125X110 |
| Bore size | Ø125 mm |
| Stroke | 110 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 SAI125X110 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 SAI125X110 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 SI125X110
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×110 | 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 SI125X110 Is Used
Heavy Stamping
Drives large presses and stamping dies requiring 6136 N push force at 0.5 MPa with stable 125 mm bore guidance.
Pallet Handling
Indexes heavy loaded pallets over a 110 mm stroke where a 313 kg vertical lift margin handles substantial payload weight.
Mold Clamping
Secures industrial injection molds using the 32 mm rod and M27x2 thread, relying on 8590 N thrust at 0.7 MPa.
Replacing the Airtac SI125 Standard Cylinder SI125X110 with the SAI125X110
To replace the SI125X110, order the SAI125X110 keeping the identical ISO 15552 mounting interface, 110 mm stroke, and G1/2 port. Because this non-S SKU lacks a magnet, it cannot take a CS1-B/DS1-B sensor; order an SAI125X110S if position sensing is required. Sizing both ways: a 100 mm bore gives 3927 N push at 0.5 MPa, while a 160 mm bore yields 10053 N. A plain cylinder drifts on air loss; the cushion only decelerates. For load holding, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant. Carbon, SUS420J2 (A), or SUS304 (B) rods are available.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI125X110
- ✓ 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 SI125X110 FAQ
Yes, the SI125X110 is discontinued. The direct replacement is the SAI125X110. It shares the same ISO 15552 mounting interface, 125 mm bore, 110 mm stroke, output force, and G1/2 port, fitting existing fixtures perfectly.
The 125 mm bore uses a G1/2 port. It generates 6136 N push and 5734 N pull at 0.5 MPa, 8590 N push at 0.7 MPa, 11045 N at 0.9 MPa, and a theoretical max of 1251 kgf at 1.0 MPa. Speed is 30-500 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI125X110
Send us the quantity and destination. We confirm price, stock and lead time on the SAI125X110 replacement — usually within 7-8 hours.