This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI125BX195S, 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 SI125BX195S
The AirTAC SI125 Standard Cylinder SI125BX195S 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 SAI125BX195S, 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 → SAI125BX195S
- 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 SI125BX195S
The AirTAC SI125BX195S 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 and features a SUS304 stainless steel rod, a built-in magnet for CS1-B/DS1-B sensors, and a G1/2 port. The direct replacement is the SAI125BX195S, which maintains the exact ISO 15552 mounting interface, output force, and stroke.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and extended life. The SAI family also adds SAIL, SAIF, and BSAI lock variants absent in the legacy SI line.
Airtac SI125 Standard Cylinder SI125BX195S Technical Specifications
| Model | Airtac SI125 Standard Cylinder SI125BX195S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI125BX195S |
| 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 SAI125BX195S 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 SAI125BX195S 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 SI125BX195S
| 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 SI125BX195S Is Used
Heavy Pressing
Drives large stamping and forming presses requiring 6136 N of thrust at 0.5 MPa, utilizing the 32 mm SUS304 rod for corrosion resistance.
Clamp Actuation
Actuates robust machining clamps on large fixtures, dropping directly into existing ISO 15552 mounting points via the SAI replacement.
Replacing the Airtac SI125 Standard Cylinder SI125BX195S with the SAI125BX195S
To replace the SI125BX195S, order the SAI125BX195S. Verify the ISO 15552 mounting interface, the 195 mm stroke, the G1/2 port (PT/G/NPT), and the -S magnet for current AirTAC switches. This 125 mm bore outputs 6136 N at 0.5 MPa; if sizing down, a 100 mm bore yields 3927 N, while sizing up to 160 mm provides 10053 N. The -B rod is SUS304 stainless steel. A plain cylinder drifts on air loss; the air cushion only decelerates. For load holding, use an external rod lock, a pilot check valve, or the SAIL/BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI125BX195S
- ✓ 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 SI125BX195S FAQ
Yes, the SI125BX195S is discontinued. The direct replacement is the SAI125BX195S. It features the same ISO 15552 mounting interface, 125 mm bore, 195 mm stroke, G1/2 port, and force, fitting existing fixtures perfectly.
The 125 mm bore has 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 push 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 SAI125BX195S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI125BX195S replacement — usually within 7-8 hours.