This model is discontinued
AirTAC has phased out the MAL series. The drop-in replacement is SAI32BX550 — same bore, stroke, output force, port and mounting, so it fits the same application. Simply order the SAI32BX550 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 SI32BX550
The AirTAC Airtac SI32 Standard Air Cylinder SI32BX550 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 SAI32BX550, 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 → SAI32BX550
About the Airtac SI32 Standard Air Cylinder SI32BX550
The AirTAC SI32BX550 is a discontinued double-acting ISO 15552 profile cylinder with a 32mm bore and 550mm stroke. Delivering 402N push at 0.5MPa, it is replaced by the SAI32BX550. This drop-in upgrade shares the exact ISO 15552 mounting interface, force, G1/8 port and accessories, fitting existing fixtures perfectly. The SAI features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and long life.
This specific SKU has a SUS304 stainless steel rod for corrosion resistance, but lacks a magnet, meaning it cannot accept position sensors. For sizing, the safe working load is roughly 241N (about 60% of the 402N push force), allowing a vertical lift of approximately 20kg with a 2:1 margin. Note that a plain cylinder drifts on air loss; for load holding, use an external pilot check valve or the SAIL lock variant.
Airtac SI32 Standard Air Cylinder SI32BX550 Technical Specifications
| Model | Airtac SI32 Standard Air Cylinder SI32BX550 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI32BX550 |
| 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 SAI32BX550 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 SAI32BX550 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 SI32BX550
| 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 SI32BX550 Is Used
Transfer Diverters
Actuates light-duty diverting gates on packaging lines, utilizing the 550mm stroke to clear product lanes effectively.
Vertical Lift Stops
Raises and lowers physical stops for tote handling, lifting loads up to 20kg with a safe 2:1 dynamic margin.
Lab Equipment Doors
Opens corrosion-resistant access panels on testing machinery, benefiting from the SUS304 stainless steel rod.
Replacing the Airtac SI32 Standard Air Cylinder SI32BX550 with the SAI32BX550
To replace the discontinued SI32BX550, order the SAI32BX550. Verify your ISO 15552 mounting accessories (LB, FA, TC, etc.), the G1/8 port, and the M10x1.25 rod thread. Because this SKU lacks the -S magnet, it cannot support CS1-B/DS1-B sensors; if sensing is needed, select an SAI model with the S suffix. Sizing both ways: a 40mm bore offers 628N push at 0.5MPa if more force is needed, while the 32mm bore is optimal for lighter loads. At 550mm stroke, prevent rod bending by using an external guide to absorb side loads. For load holding on air loss, use an external rod lock or the SAIL/BSAI variants, as cushions only decelerate.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI32BX550
- ✓ 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 SI32BX550 FAQ
Yes, the SI32BX550 is discontinued. The exact drop-in replacement is the SAI32BX550. It is dimensionally interchangeable per ISO 15552, retaining the same 32mm bore, 550mm stroke, force, G1/8 port, and mounting interface.
It features a G1/8 air port. The force ratings are: 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.
Related AirTAC SAI Cylinders
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