This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the drop-in replacement SAI32BX225S, 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 SI32BX225S
The AirTAC Airtac SI32 Standard Air Cylinder SI32BX225S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø32mm bore and 225mm stroke, G1/8 air ports and adjustable end cushioning. This model is discontinued — the drop-in replacement is the SAI32BX225S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ32 mm
- Stroke225 mm
- Port sizeG1/8
- Acting typeDouble acting
- Rod threadM10×1.25
- StatusDiscontinued → SAI32BX225S
- 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 SI32BX225S
The AirTAC SI32BX225S is a discontinued double-acting ISO 15552 profile cylinder with a 32mm bore, 225mm stroke, and a SUS304 stainless steel rod. Delivering 402 N of push force at 0.5 MPa, it is directly replaced by the SAI32BX225S. This drop-in upgrade shares the same G1/8 port, M10x1.25 thread, and mounting interface, fitting existing fixtures perfectly.
The SAI upgrade features a new piston seal with two Y-shaped one-way elements for low start-up pressure and long life. For this bore, a safe working load is roughly 241 N (about 60% of the 402 N push force), equating to a 20 kg vertical lift with a 2:1 margin. The -S magnet works with legacy CS1-B/DS1-B sensors, while the SAI family adds SAIL lock and SAIF valve variants the SI lacked.
Airtac SI32 Standard Air Cylinder SI32BX225S Technical Specifications
| Model | Airtac SI32 Standard Air Cylinder SI32BX225S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI32BX225S |
| Bore size | Ø32 mm |
| Stroke | 225 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 SAI32BX225S 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 SAI32BX225S produces the same force from the same bore — a true drop-in on output. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SI32 Standard Air Cylinder SI32BX225S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 32 | Bore size in mm. |
| ×225 | 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 SI32BX225S Is Used
Stainless Rod Actuation
Ideal for compact handling tasks requiring corrosion resistance, utilizing the SUS304 rod for light-duty pushing in packaging machinery.
Material Diversion
Provides reliable 225mm stroke movement for diverting small components on automated lines, operating efficiently at 30-800 mm/s.
Compact Ejection
Generates 402 N of push force at 0.5 MPa to eject light parts from fixtures, with a safe working load around 241 N.
Replacing the Airtac SI32 Standard Air Cylinder SI32BX225S with the SAI32BX225S
To replace the SI32BX225S, order the SAI32BX225S. Confirm the ISO 15552 mounting interface, the 32mm bore, 225mm stroke, G1/8 port, and your mounting accessory. The -B rod is SUS304 stainless steel, and the -S magnet supports CS1-B/DS1-B switches. At 225mm stroke, guide rods are recommended to prevent side-load bending. For sizing, the 40mm bore offers higher force (628 N push at 0.5 MPa), while the 32mm bore is more compact. Note that a plain cylinder drifts on air loss; the cushion only decelerates. For load holding, use an external pilot check valve or the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI32BX225S
- ✓ 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 SI32BX225S FAQ
Yes, the SI32BX225S is discontinued. The exact drop-in replacement is the SAI32BX225S. It is dimensionally interchangeable per ISO 15552, retaining the same 32mm bore, 225mm stroke, G1/8 port, and mounting interface.
The bore is 32mm with a G1/8 air port. Theoretical forces are: 402 N push and 345 N pull at 0.5 MPa; 563 N push at 0.7 MPa; 724 N push at 0.9 MPa; and a maximum force of 82 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI32BX225S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI32BX225S replacement — usually within 7-8 hours.