This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI32BX125S, 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 SI32 Standard Air Cylinder SI32BX125S
The AirTAC SI32 Standard Air Cylinder SI32BX125S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø32mm bore and 125mm stroke, G1/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI32BX125S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ32 mm
- Stroke125 mm
- Port sizeG1/8
- Acting typeDouble acting
- Rod threadM10×1.25
- StatusDiscontinued → SAI32BX125S
- 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 SI32 Standard Air Cylinder SI32BX125S
The AirTAC SI32BX125S is a discontinued double-acting ISO 15552 profile cylinder with a 32mm bore, 125mm stroke, and a SUS304 stainless steel rod. Delivering 402N push force at 0.5MPa via a G1/8 port, it is replaced by the SAI32BX125S. This direct upgrade shares the exact ISO 15552 mounting interface, bore, and stroke, fitting existing fixtures perfectly.
The SAI features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and long life. The SI32BX125S includes a piston magnet for legacy CS1-B/DS1-B sensors; the SAI uses current AirTAC switches. The SAI family also adds SAIL, SAIF, and BSAI lock variants lacking in the SI line.
Airtac SI32 Standard Air Cylinder SI32BX125S Technical Specifications
| Model | Airtac SI32 Standard Air Cylinder SI32BX125S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI32BX125S |
| Bore size | Ø32 mm |
| Stroke | 125 mm |
| Acting type | Double acting |
| Port size | G1/8 |
| Rod thread | M10×1.25 |
| 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 – 800 mm/s |
| Cushion | Adjustable, 27 mm |
| Max standard stroke | Up to 1000 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The SAI32BX125S carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø32mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 402 N | 346 N |
| 0.7 MPa | 563 N | — |
| Max (@1.0 MPa) | 82 kgf | |
The SAI32BX125S produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SI32 Standard Air Cylinder SI32BX125S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 32 | Bore size in mm. |
| ×125 | 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 SI32 Standard Air Cylinder SI32BX125S Is Used
Small Part Ejection
Uses the 402N push force at 0.5MPa to eject small molded parts from a fixture, relying on the 125mm stroke to clear the machine bed.
Package Diverting
The 20kg vertical lift capacity makes this 32mm bore cylinder ideal for actuating light diverter arms on packaging conveyors.
Lab Test Clamping
The SUS304 stainless rod provides corrosion resistance for clamping fluid containers in wet laboratory testing environments.
Replacing the Airtac SI32 Standard Air Cylinder SI32BX125S with the SAI32BX125S
To replace the SI32BX125S, order the SAI32BX125S, confirming the ISO 15552 interface, 32mm bore, 125mm stroke, G1/8 port, and mounting accessory. The -B rod is SUS304 stainless steel, and the -S magnet works with legacy CS1-B/DS1-B sensors. Sizing both ways: a 40mm bore offers 628N push at 0.5MPa, while dropping to 0.4MPa yields about 321N. Note that a plain cylinder drifts on air loss—the cushion only decelerates. For load holding, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant. At 125mm stroke, rod bending is low, but ensure guide alignment to prevent side-load wear.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI32BX125S
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SI32 Standard Air Cylinder SI32BX125S FAQ
Yes, the SI32BX125S is discontinued. The direct replacement is the SAI32BX125S. It shares the same ISO 15552 mounting interface, 32mm bore, 125mm stroke, force, G1/8 port, and SUS304 rod, fitting existing fixtures without modification.
This 32mm bore cylinder features a G1/8 port and provides 402N push / 345N pull at 0.5MPa, 563N push at 0.7MPa, 724N push at 0.9MPa, and a theoretical max of 82kgf at 1.0MPa. The rod end thread is M10x1.25.
Related AirTAC SAI Cylinders
Request a Quote for the SAI32BX125S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI32BX125S replacement — usually within 7-8 hours.