This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI125X190, 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 SI125X190
The AirTAC SI125 Standard Cylinder SI125X190 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 SAI125X190, 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 → SAI125X190
- 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 SI125X190
The AirTAC SI125X190 is a discontinued double-acting ISO 15552 profile cylinder with a 125 mm bore and 190 mm stroke. It delivers 6136 N push force at 0.5 MPa through a G1/2 port. AirTAC replaced this legacy unit with the SAI125X190, a direct upgrade retaining the exact ISO 15552 mounting interface, M27x2 rod thread, and 40 mm cushions.
The SAI upgrade features a new piston seal with two Y-shaped one-way elements for low start-up pressure and long life. Note this specific SKU lacks a magnet, so it cannot accept CS1-B/DS1-B sensors. For load holding on air loss, explore the SAIL or BSAI lock variants instead of relying on cushions.
Airtac SI125 Standard Cylinder SI125X190 Technical Specifications
| Model | Airtac SI125 Standard Cylinder SI125X190 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI125X190 |
| 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 SAI125X190 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 SAI125X190 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 SI125X190
| 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 SI125X190 Is Used
Heavy Press Operations
Applies 6136 N of thrust at 0.5 MPa for forming, stamping, and pressing heavy assemblies securely in automated lines.
Large Clamp Fixtures
Holds substantial workpieces in machining beds, utilizing the 125 mm bore and 190 mm stroke for deep reaches.
Replacing the Airtac SI125 Standard Cylinder SI125X190 with the SAI125X190
To replace the SI125X190, order the SAI125X190. Verify your ISO 15552 mounting accessory (LB, FA, TC, etc.), the G1/2 port, and the 190 mm stroke. Because this SKU has no -S magnet, it cannot support position sensing; if you need switches, select an SAI125X190S and use current AirTAC sensors. If sizing up or down, neighbouring bores are 100 mm and 160 mm. At 0.5 MPa, the 100 mm bore yields 3927 N push, while the 160 mm bore yields 10053 N push. For load holding without live air, add an external pilot check valve or choose the SAIL air-released lock or BSAI clamp-lock variant. With a 190 mm stroke, side-load is minimal, but always ensure rigid guidance to prevent rod bending.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI125X190
- ✓ 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 SI125X190 FAQ
Yes, the SI125X190 is discontinued. The direct replacement is the AirTAC SAI125X190. It shares the identical ISO 15552 mounting interface, 125 mm bore, 190 mm stroke, G1/2 port, and output force, fitting existing fixtures perfectly.
This 125 mm bore cylinder uses a G1/2 port. The thrust is 6136 N push and 5734 N pull at 0.5 MPa, 8590 N push at 0.7 MPa, 11045 N push at 0.9 MPa, and a theoretical maximum of 1251 kgf at 1.0 MPa. It operates at 30-500 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI125X190
Send us the quantity and destination. We confirm price, stock and lead time on the SAI125X190 replacement — usually within 7-8 hours.