This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI125AX195S, 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 SI125AX195S
The AirTAC SI125 Standard Cylinder SI125AX195S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 195mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI125AX195S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke195 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAI125AX195S
- 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 SI125AX195S
The AirTAC SI125AX195S is a discontinued double-acting ISO 15552 profile cylinder with a 125 mm bore and 195 mm stroke. It features a SUS420J2 stainless piston rod, a G1/2 port, and delivers 6136 N push force at 0.5 MPa. AirTAC replaced this legacy unit with the SAI125AX195S, a direct upgrade retaining the exact bore, stroke, force, port, and mounting interface.
The SAI replacement upgrades the piston seal with two Y-shaped one-way elements for lower start-up pressure and longer life. This -S model includes a piston magnet for CS1-B/DS1-B sensors, and Viton H seals can extend operation to 150 C.
Airtac SI125 Standard Cylinder SI125AX195S Technical Specifications
| Model | Airtac SI125 Standard Cylinder SI125AX195S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI125AX195S |
| Bore size | Ø125 mm |
| Stroke | 195 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 SAI125AX195S 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 SAI125AX195S 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 SI125AX195S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×195 | 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 SI125AX195S Is Used
Heavy Stamping Press
Drives large platens and heavy dies in metal forming, utilizing the 11045 N push force at 0.9 MPa for high-tonnage actuation.
Pallet Lift Station
Lifts loaded pallets vertically, safely handling the 313 kg calculated lift capacity while relying on external guides for stability.
Automated Clamp Fixture
Secures large automotive or structural components during machining, using the robust 32 mm SUS420J2 stainless rod.
Replacing the Airtac SI125 Standard Cylinder SI125AX195S with the SAI125AX195S
To replace the SI125AX195S, order the SAI125AX195S. Confirm the ISO 15552 mounting interface, the 195 mm stroke, the G1/2 port (PT/G/NPT thread options), and your mounting accessory (LB, FA, TC, etc.). The -S magnet and -A SUS420J2 rod are retained. If you need more force than the 6136 N at 0.5 MPa, step up to a 160 mm bore; if less is required, a 100 mm bore provides 3927 N. Note that a plain cylinder drifts on air loss because the cushion only decelerates near stroke end—for load holding, specify the SAIL or BSAI lock variant, or use an external pilot check valve. For this 195 mm stroke, ensure guide rails carry side loads to prevent rod bending.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI125AX195S
- ✓ 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 SI125AX195S FAQ
Yes, the SI125AX195S is discontinued. The direct replacement is the SAI125AX195S. It is dimensionally interchangeable per ISO 15552, keeping the same 125 mm bore, 195 mm stroke, G1/2 port, and mounting fixtures.
It delivers 6136 N push and 5734 N pull at 0.5 MPa, 8590 N push at 0.7 MPa, and 11045 N push at 0.9 MPa. The theoretical max force is 1251 kgf at 1.0 MPa. Operating speed is 30-500 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI125AX195S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI125AX195S replacement — usually within 7-8 hours.