This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI32AX550S, 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 SI32AX550S
The AirTAC SI32 Standard Air Cylinder SI32AX550S 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 SAI32AX550S, 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 → SAI32AX550S
- 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 SI32AX550S
The AirTAC SI32AX550S 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. The direct replacement is the SAI32AX550S, retaining the exact interface, bore, stroke, and force.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. The -A suffix denotes a SUS420J2 stainless rod, and -S provides a magnet for CS1-B/DS1-B sensors.
Airtac SI32 Standard Air Cylinder SI32AX550S Technical Specifications
| Model | Airtac SI32 Standard Air Cylinder SI32AX550S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI32AX550S |
| 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 SAI32AX550S 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 SAI32AX550S 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 SI32AX550S
| 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 SI32AX550S Is Used
Compact Part Ejection
Uses the 402N push force at 0.5MPa to push lightweight machined parts out of a fixture over the 550mm travel distance.
Replacing the Airtac SI32 Standard Air Cylinder SI32AX550S with the SAI32AX550S
To replace this SI32AX550S, order the SAI32AX550S. Confirm the ISO 15552 mounting interface, 32mm bore, 550mm stroke, G1/8 port, and mounting accessory. The -S magnet enables current AirTAC switches, while the -A rod is SUS420J2 stainless. For sizing, a 40mm bore yields 628N push at 0.5MPa, whereas dropping to lower pressure reduces force. Note: at 550mm, prevent rod bending by using external guides to manage side loads. A plain cylinder drifts on air loss; for load holding, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI32AX550S
- ✓ 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 SI32AX550S FAQ
Yes, the SI32AX550S is discontinued. The direct replacement is the SAI32AX550S. It is dimensionally interchangeable per ISO 15552, retaining the same 32mm bore, 550mm stroke, G1/8 port, and mounting interface.
This 32mm bore double-acting cylinder uses a G1/8 air port. It generates 402N push and 345N pull at 0.5MPa, 563N push at 0.7MPa, and a theoretical maximum of 82kgf at 1.0MPa. It features a 12mm rod and M10x1.25 thread.
Related AirTAC SAI Cylinders
Request a Quote for the SAI32AX550S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI32AX550S replacement — usually within 7-8 hours.