This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI125BX130S, 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 SI125BX130S
The AirTAC SI125 Standard Cylinder SI125BX130S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 130mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI125BX130S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke130 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAI125BX130S
- 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 SI125BX130S
The AirTAC SI125BX130S is a discontinued double-acting ISO 15552 profile cylinder featuring a 125 mm bore, 130 mm stroke, and a SUS304 stainless steel piston rod. It delivers 6136 N push force at 0.5 MPa. AirTAC replaced this legacy unit with the SAI125BX130S, a direct upgrade retaining the exact ISO 15552 mounting interface, G1/2 port, and output force.
The SAI replacement upgrades the piston seal to two Y-shaped one-way elements for lower start-up pressure and longer life. This SI125BX130S includes a piston magnet for legacy CS1-B/DS1-B sensors, while the SAI family uses current AirTAC switches.
Airtac SI125 Standard Cylinder SI125BX130S Technical Specifications
| Model | Airtac SI125 Standard Cylinder SI125BX130S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI125BX130S |
| Bore size | Ø125 mm |
| Stroke | 130 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 SAI125BX130S 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 SAI125BX130S 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 SI125BX130S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×130 | 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 SI125BX130S Is Used
Heavy Stamping Press
Drives large dies and heavy metal forming tooling where the 6136 N push force at 0.5 MPa easily overcomes high blanking resistance.
Composite Mold Clamping
Holds large resin or composite molds shut during curing, utilizing the 125 mm bore's 1251 kgf maximum theoretical force at 1.0 MPa.
Replacing the Airtac SI125 Standard Cylinder SI125BX130S with the SAI125BX130S
To replace the discontinued SI125BX130S, order the SAI125BX130S. Confirm it matches your ISO 15552 mounting interface, 130 mm stroke, G1/2 port, and mounting accessories. This unit has the -B SUS304 rod and -S magnet; the SAI replacement accepts current AirTAC switches instead of the legacy CS1-B/DS1-B set. If sizing alternatives, a 100 mm bore yields 3927 N push at 0.5 MPa, while a 160 mm bore yields 10053 N. Note that a plain cylinder drifts on air loss—the cushion only decelerates—so use an external rod lock or pilot check valve for load holding, or specify the SAIL or BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI125BX130S
- ✓ 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 SI125BX130S FAQ
Yes, the AirTAC SI125BX130S is discontinued. The direct replacement is the SAI125BX130S. It shares the same ISO 15552 mounting interface, 125 mm bore, 130 mm stroke, output force, and G1/2 port, fitting existing fixtures perfectly.
The 125 mm bore uses a G1/2 air port. Force ratings are 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 maximum theoretical force of 1251 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI125BX130S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI125BX130S replacement — usually within 7-8 hours.