Fan Guard & Finger Grille in 304 Stainless Steel (AISI 304 (1.4301)) is used for keeping fingers and objects away from rotating fan blades in electronics, appliances and equipment while passing cooling air. The alloy gives good general corrosion resistance in atmosphere and fresh water and is essentially non-magnetic (annealed), with a practical service limit of approx. +450 °C continuous.
Alloy Properties
| Grade designation | AISI 304 (1.4301) |
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| Magnetic response | Essentially non-magnetic (annealed) |
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| Service temperature | approx. +450 °C continuous |
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| Corrosion characteristic | Good general corrosion resistance in atmosphere and fresh water |
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Specifications of Fan Guard & Finger Grille Available in 304 Stainless Steel
| Fan size | Grille diameter (mm) | Hole diameter (mm) | Dome height (mm) | Mounting holes | Thickness (mm) |
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| 40 mm | 38 | 3.0 | 0 | 4 | 0.8 |
| 80 mm | 76 | 4.0 | 0 | 4 | 1.0 |
| 120 mm | 116 | 5.0 | 0 | 4 | 1.0 |
| 140 mm | 136 | 5.0 | 0 | 4 | 1.2 |
Where 304 Stainless Steel Fan Guard & Finger Grille Is Used
- Electronics OEMs: guards on 40–140 mm cooling fans in power supplies and enclosures.
- Appliance makers: guards in fan heaters, dehumidifiers and air purifiers.
- Industrial control panels: filter-fan guards on cabinet ventilation.
- Telecom & outdoor cabinets: corrosion-resistant fan guards.
Ordering Fan Guard & Finger Grille in 304 Stainless Steel
- Probe compliance: Hole size and standoff must pass the IEC finger probe for the product standard (e.g. IEC 62368-1).
- Fan size & screw pitch: Match the fan frame and mounting hole spacing exactly.
- Airflow: Perforated guards with high open area lose less airflow than wire guards of the same probe rating.
Mistakes to Avoid with Fan Guard & Finger Grille
- Using a decorative grille that fails the finger-probe test.
- Choosing a mounting pitch for the wrong fan size.
