This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI32AX550, 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 SI32AX550
The AirTAC SI32 Standard Air Cylinder SI32AX550 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø32mm bore and 550mm stroke, G1/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI32AX550, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ32 mm
- Stroke550 mm
- Port sizeG1/8
- Acting typeDouble acting
- Rod threadM10×1.25
- StatusDiscontinued → SAI32AX550
- 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 SI32AX550
The AirTAC SI32AX550 is a discontinued double-acting ISO 15552 profile cylinder with a 32mm bore and 550mm stroke. It delivers 402N push force at 0.5MPa via a G1/8 port. AirTAC replaced this unit with the SAI32AX550, a direct upgrade sharing the same interface, force, and mounting. The SAI features an upgraded piston seal with two Y-shaped one-way elements for lower start-up pressure and longer life.
This specific SKU uses an SUS420J2 stainless steel piston rod for corrosion resistance. Because it lacks the -S magnet suffix, it cannot accept position sensors. The SAI family also introduces lock and valve variants absent in the SI line, including the SAIL air-released lock and SAIF built-in 4M valve for 32-100mm bores.
Airtac SI32 Standard Air Cylinder SI32AX550 Technical Specifications
| Model | Airtac SI32 Standard Air Cylinder SI32AX550 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI32AX550 |
| Bore size | Ø32 mm |
| Stroke | 550 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 SAI32AX550 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 SAI32AX550 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 SI32AX550
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 32 | Bore size in mm. |
| ×550 | 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 SI32AX550 Is Used
Light-Part Diversion
Pushes small packages on a 32mm bore line using 402N force, diverting items at 30-800mm/s without stressing the framework.
Stainless Rod Actuation
The SUS420J2 rod suits light machining or washdown stations, extending 550mm to position corrosion-sensitive workpieces.
Replacing the Airtac SI32 Standard Air Cylinder SI32AX550 with the SAI32AX550
To replace the SI32AX550, order the SAI32AX550. Confirm the ISO 15552 mounting interface, 32mm bore, 550mm stroke, G1/8 port, and M10x1.25 rod thread. This SKU has no magnet, so it cannot support switches; if sensing is needed, select an SAI model with the S suffix for current AirTAC switches. For load holding, note that a standard cylinder drifts on air loss—the cushion only decelerates—so use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant. At 550mm, prevent rod bending by guiding the load externally. If downsizing, a 40mm bore gives 628N push at 0.5MPa; if upsizing, a 50mm bore gives 982N.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI32AX550
- ✓ 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 SI32AX550 FAQ
Yes, the SI32AX550 is discontinued. The direct replacement is the SAI32AX550. It is dimensionally interchangeable per ISO 15552, matching the 32mm bore, 550mm stroke, force, G1/8 port, and mounting fixtures exactly.
The G1/8 port feeds a 32mm bore yielding 402N push and 345N pull at 0.5MPa, 563N push at 0.7MPa, 724N push at 0.9MPa, and a theoretical max of 82kgf at 1.0MPa. Speed is 30-800mm/s with 27mm adjustable cushions.
Related AirTAC SAI Cylinders
Request a Quote for the SAI32AX550
Send us the quantity and destination. We confirm price, stock and lead time on the SAI32AX550 replacement — usually within 7-8 hours.