This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the drop-in replacement SAI32BX475, 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 SI32BX475
The AirTAC Airtac SI32 Standard Air Cylinder SI32BX475 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø32mm bore and 475mm stroke, G1/8 air ports and adjustable end cushioning. This model is discontinued — the drop-in replacement is the SAI32BX475, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ32 mm
- Stroke475 mm
- Port sizeG1/8
- Acting typeDouble acting
- Rod threadM10×1.25
- StatusDiscontinued → SAI32BX475
- 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 SI32BX475
The AirTAC SI32BX475 is a discontinued double-acting ISO 15552 profile cylinder featuring a 32mm bore, 475mm stroke, and a SUS304 stainless steel rod. Delivering 402 N push force at 0.5 MPa, it is replaced by the SAI32BX475. This drop-in successor matches the exact G1/8 port, M10x1.25 thread, and ISO 15552 mounting interface.
The SAI32BX475 upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and extended life. Because this SKU lacks a magnet (-S), it cannot accept a sensor. For computed sizing, expect a safe working load of roughly 241 N (60% of the 0.5 MPa push) or a 20 kg vertical lift with a 2:1 margin.
Airtac SI32 Standard Air Cylinder SI32BX475 Technical Specifications
| Model | Airtac SI32 Standard Air Cylinder SI32BX475 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI32BX475 |
| Bore size | Ø32 mm |
| Stroke | 475 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 SAI32BX475 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 SAI32BX475 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 SI32BX475
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 32 | Bore size in mm. |
| ×475 | 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 SI32BX475 Is Used
Stainless Rod Actuation
Ideal for light-duty machinery requiring corrosion resistance, utilizing the SUS304 rod for reliable pushing in damp or washdown environments.
Long Stroke Diverting
The 475mm stroke suits extended diverting or sorting gates on conveyors, moving lightweight packages with a safe working load near 241 N.
Vertical Lifting Gates
Provides a 20 kg vertical lift capacity with a 2:1 safety margin, useful for automated warehouse access doors and material handling flaps.
Replacing the Airtac SI32 Standard Air Cylinder SI32BX475 with the SAI32BX475
To replace the SI32BX475, order the SAI32BX475. Verify your ISO 15552 mounting hardware (LB, FA, or TC) and the G1/8 port. This unit has a SUS304 (-B) rod; keep that option if corrosion resistance is needed. Since there is no -S magnet, you cannot mount CS1-B/DS1-B sensors here. The 475mm stroke exceeds 300mm, so use external guides to prevent rod bending and side-load wear. For load holding on air loss, note the cushion only decelerates; add an external pilot check valve or explore the SAIL/BSAI lock variants. If downsizing, a 20mm bore yields less force; if upsizing to 40mm, you gain 628 N push at 0.5 MPa.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI32BX475
- ✓ 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 SI32BX475 FAQ
Yes, the SI32BX475 is discontinued. The exact drop-in replacement is the SAI32BX475. It shares the identical ISO 15552 mounting interface, 32mm bore, 475mm stroke, force, and G1/8 port, fitting directly into existing fixtures.
This double-acting cylinder features a G1/8 air port. It delivers 402 N push and 345 N pull at 0.5 MPa, 563 N push at 0.7 MPa, and a theoretical maximum force of 82 kgf at 1.0 MPa. Operating speed is 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI32BX475
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