This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI125X190S, 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 SI125X190S
The AirTAC SI125 Standard Cylinder SI125X190S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 190mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI125X190S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke190 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAI125X190S
- 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 SI125X190S
The AirTAC SI125X190S is a discontinued double-acting ISO 15552 profile cylinder with a 125 mm bore and 190 mm stroke, delivering 6136 N push force at 0.5 MPa via its G1/2 port. It is replaced by the SAI125X190S.
The SAI direct maintains the exact ISO 15552 mounting interface, M27x2 thread, and 40 mm cushions. It upgrades the piston seal to two Y-shaped one-way elements for low start-up pressure.
Airtac SI125 Standard Cylinder SI125X190S Technical Specifications
| Model | Airtac SI125 Standard Cylinder SI125X190S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI125X190S |
| Bore size | Ø125 mm |
| Stroke | 190 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 SAI125X190S 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 SAI125X190S 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 SI125X190S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×190 | 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 SI125X190S Is Used
Heavy Pressing
Drives large stamping or forming presses requiring up to 11045 N of push force at 0.9 MPa.
Pallet Handling
Actuates heavy-duty pallet lifts and stops in automated distribution centers.
Clamp Actuation
Secures large fabricated components during machining or welding with robust 125 mm bore power.
Replacing the Airtac SI125 Standard Cylinder SI125X190S with the SAI125X190S
To replace the SI125X190S, order the SAI125X190S keeping the same bore, stroke, -S magnet, and ISO 15552 mounting. The SAI uses current AirTAC switches instead of the legacy CS1-B/DS1-B. If you need less force, a 100 mm bore gives 3927 N push at 0.5 MPa; if you need more, a 160 mm bore yields 10053 N. A plain cylinder drifts on air loss—the cushion only decelerates—so for load holding use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant. At 190 mm stroke side-load risk is low, but always guide the load.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI125X190S
- ✓ 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 SI125X190S FAQ
Yes, the SI125X190S is discontinued. The direct replacement is the SAI125X190S, which shares the same ISO 15552 mounting interface, 125 mm bore, 190 mm stroke, G1/2 port, and output force.
The G1/2 port cylinder delivers 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 maximum theoretical force of 1251 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI125X190S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI125X190S replacement — usually within 7-8 hours.