This model is discontinued
AirTAC has phased out the MAL series. The drop-in replacement is SAI32BX550S — same bore, stroke, output force, port and mounting, so it fits the same application. Simply order the SAI32BX550S 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 SI32BX550S
The AirTAC Airtac SI32 Standard Air Cylinder SI32BX550S 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 drop-in replacement is the SAI32BX550S, 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 → SAI32BX550S
About the Airtac SI32 Standard Air Cylinder SI32BX550S
The AirTAC SI32BX550S is a discontinued double-acting ISO 15552 profile cylinder featuring a 32mm bore, 550mm stroke, and a SUS304 stainless steel piston rod. It delivers 402N push force at 0.5MPa and uses a G1/8 air port. The direct drop-in replacement is the SAI32BX550S, matching the exact bore, stroke, output force, port size, and ISO 15552 mounting interface for seamless fixture integration.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and extended life. For this bore, a safe working load is roughly 241N (60% of the 402N push force), equating to a 20kg vertical lift with a 2:1 margin. This -S model includes a piston magnet for legacy CS1-B/DS1-B sensors, and a Viton H seal option can raise the operating temperature to 150C.
Airtac SI32 Standard Air Cylinder SI32BX550S Technical Specifications
| Model | Airtac SI32 Standard Air Cylinder SI32BX550S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI32BX550S |
| 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 SAI32BX550S 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 SAI32BX550S 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 SI32BX550S
| 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 SI32BX550S Is Used
Diverting Gate Actuation
Drives lightweight routing flaps on packaging lines where the 241N safe working load easily overcomes flap friction and the 550mm stroke provides full lane separation.
Corrosive-Environment Ejection
The SUS304 stainless rod excels in humid washdown areas, pushing small containers off accumulation rollers over a 550mm extension without rusting.
Low-Mass Vertical Lifting
Raises 20kg product trays using a 2:1 safety margin against the 402N push force, while the 550mm stroke accommodates varying stack heights.
Replacing the Airtac SI32 Standard Air Cylinder SI32BX550S with the SAI32BX550S
To replace the SI32BX550S, order the SAI32BX550S and verify the ISO 15552 mounting interface, 32mm bore, 550mm stroke, G1/8 port, and mounting accessory. The -B suffix indicates a SUS304 stainless rod, and -S denotes the magnet for CS1-B/DS1-B switches. If sizing up, the 40mm bore offers 628N push at 0.5MPa; if sizing down, ensure the load stays under 241N. Plain cylinders drift on air loss, so for load holding use an external rod lock, pilot check valve, or the SAIL/BSAI lock variants. Because the 550mm stroke exceeds 300mm, use external guides to prevent rod bending and side-load wear.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI32BX550S
- ✓ 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 SI32BX550S FAQ
Yes, the SI32BX550S is discontinued. The exact drop-in replacement is the SAI32BX550S. It is dimensionally interchangeable per ISO 15552, retaining the same 32mm bore, 550mm stroke, G1/8 port, and mounting interface to fit existing fixtures directly.
This 32mm bore double-acting cylinder features a G1/8 air port and M10x1.25 rod thread. It provides 402N push and 345N pull at 0.5MPa, 563N push at 0.7MPa, 724N push at 0.9MPa, and a theoretical maximum force of 82kgf at 1.0MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI32BX550S
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