This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI125X195H, 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 SI125X195H
The AirTAC SI125 Standard Cylinder SI125X195H 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 SAI125X195H, 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 → SAI125X195H
- 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 SI125X195H
The AirTAC SI125X195H is a discontinued double-acting ISO 15552 profile cylinder with a 125 mm bore and 195 mm stroke. It delivers 6136 N push force at 0.5 MPa via a G1/2 port. Because this SKU lacks a magnet, it cannot accept position sensors. The H suffix indicates Viton FKM seals, raising the operating temperature range from -20 to +70 C up to 0-150 C.
AirTAC replaced the SI line with the SAI family. The SAI125X195H is the direct replacement, matching the ISO 15552 mounting interface, M27x2 rod thread, and 40 mm cushions. The SAI features an upgraded piston seal with two Y-shaped one-way elements for lower start-up pressure and longer life.
Airtac SI125 Standard Cylinder SI125X195H Technical Specifications
| Model | Airtac SI125 Standard Cylinder SI125X195H |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI125X195H |
| 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 SAI125X195H 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 SAI125X195H 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 SI125X195H
| 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 SI125X195H Is Used
Heavy Stamp Pressing
Generates 8590 N at 0.7 MPa to form thick metal plates and actuate heavy-duty stamping dies.
High-Temp Ejection
The Viton H seal handles 0-150 C environments, reliably ejecting hot cast or molded parts without degrading.
Replacing the Airtac SI125 Standard Cylinder SI125X195H with the SAI125X195H
To replace the SI125X195H, order the SAI125X195H. Confirm the ISO 15552 mounting accessory (LB foot, TC trunnion, etc.) and the G1/2 port match your existing fixture. This high-temp Viton H version suits environments up to 150 C. Since this non-magnetic SKU cannot take a CS1-B or DS1-B switch, add external sensing if needed. The 125 mm bore yields 6136 N push at 0.5 MPa; if less force is required, an 80 mm bore provides 2513 N, while a 160 mm bore offers 10053 N. A plain cylinder drifts on air loss—the cushion only decelerates—so use an external pilot check valve or the SAIL/BSAI lock variant for load holding. For this 195 mm stroke, guide external rods to prevent side-load bending.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI125X195H
- ✓ 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 SI125X195H FAQ
Yes, the SI125X195H is discontinued. The direct replacement is the SAI125X195H. It shares the same ISO 15552 mounting interface, 125 mm bore, 195 mm stroke, G1/2 port, and output force, fitting existing fixtures directly.
This 125 mm bore cylinder uses a G1/2 air port. 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 maximum force is 1251 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI125X195H
Send us the quantity and destination. We confirm price, stock and lead time on the SAI125X195H replacement — usually within 7-8 hours.