This model is discontinued
AirTAC has phased out the MAL series. The drop-in replacement is SAI32BX55S — same bore, stroke, output force, port and mounting, so it fits the same application. Simply order the SAI32BX55S in place of this model. 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 SI32BX55S
The AirTAC Airtac SI32 Standard Air Cylinder SI32BX55S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø32mm bore and 55mm stroke, G1/8 air ports and adjustable end cushioning. This model is discontinued — the drop-in replacement is the SAI32BX55S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ32 mm
- Stroke55 mm
- Port sizeG1/8
- Acting typeDouble acting
- Rod threadM10×1.25
- StatusDiscontinued → SAI32BX55S
About the Airtac SI32 Standard Air Cylinder SI32BX55S
The AirTAC SI32BX55S is a discontinued double-acting ISO 15552 profile cylinder with a 32mm bore, 55mm stroke, and a SUS304 stainless steel rod. Generating 402N push force at 0.5MPa via a G1/8 port, it is replaced by the SAI32BX55S. This drop-in upgrade retains the exact ISO 15552 mounting interface, bore, stroke, and force.
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 241N (60% of the 0.5MPa push force), translating to a 20kg vertical lift with a 2:1 margin. The -S magnet works with legacy CS1-B/DS1-B sensors, while the SAI family introduces SAIL, SAIF, and BSAI lock variants the SI lacked.
Airtac SI32 Standard Air Cylinder SI32BX55S Technical Specifications
| Model | Airtac SI32 Standard Air Cylinder SI32BX55S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI32BX55S |
| Bore size | Ø32 mm |
| Stroke | 55 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 SAI32BX55S 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 SAI32BX55S 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 SI32BX55S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 32 | Bore size in mm. |
| ×55 | 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 SI32BX55S Is Used
Stainless Rod Clamping
Ideal for small part clamping in machining cells where the SUS304 rod resists corrosion from cutting fluids.
Compact Sorting Divertor
Provides reliable actuation for lightweight diverting gates on assembly lines using its 402N push force.
Lab Test Positioning
Moves sample trays or test probes with a 55mm stroke, benefiting from the low-friction Y-shaped SAI seals.
Replacing the Airtac SI32 Standard Air Cylinder SI32BX55S with the SAI32BX55S
To replace the SI32BX55S, order the SAI32BX55S. Verify the ISO 15552 mounting interface, 32mm bore, 55mm stroke, G1/8 port, and the -S magnet for current AirTAC switches. The -B rod is SUS304 stainless steel, offering corrosion resistance over the standard carbon steel. If you need more force, the neighbouring 40mm bore yields 628N push at 0.5MPa; if less is acceptable, check smaller custom options. Note that a plain cylinder drifts on air loss as the cushion only decelerates, so use a pilot check valve or SAIL lock variant for load holding.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI32BX55S
- ✓ 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 SI32BX55S FAQ
Yes, the SI32BX55S is discontinued. The exact drop-in replacement is the SAI32BX55S, which shares the same ISO 15552 mounting interface, 32mm bore, 55mm stroke, force, and G1/8 port.
It features a G1/8 port and delivers a push of 402N and pull of 345N at 0.5MPa, 563N push at 0.7MPa, and a theoretical max of 82kgf at 1.0MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI32BX55S
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