Fan Guards Information

Fan guards are used to provide a physical barrier around spinning fan blades to prevent accidental contact with fingers or other objects. They are typically constructed using metal wire or plastic. Fan guards are manufactured in a variety of configurations which depend upon the degree of accessibility required and the shape of the fan blades themselves. Fan guards are designed to maximize air flow while minimizing noise. Some fan guards are assemblies that include filter media intended to reduce passage of dust particles and other contaminants through the fan into enclosures. Mounting options include through-hole types secured by screw or bolt, and snap-on varieties that attach directly through application of a pushing force.

 electronic cooling fan guard assembly



Fan guards may be designed in two-dimensional or three-dimensional geometries. The manufacturing process of metal wire fan guards involves cutting, bending, welding, and surface treatment. Metal fan guards are fabricated in a variety of ways including CNC wire coil forming and automated wire mesh welding. Metal wire material can include low carbon steel, stainless steel, or aluminum alloy.


Plastic fan guards are often produced by injection molding using materials such as nylon, polybutylene terephthalate (PBT), acrylonitrile butadiene styrene (ABS). Plastic fan guards often have fire resistance ratings such as UL94V-0.


A variety of fan guard configurations are available, such as:


  • Circular
  • Rectangular
  • Dome type
  • Taper-sided
  • Flat type
  • Spiral wire
  • Specialized shapes

Various finishes and surface treatments are often available that offer corrosion protection for metal fan guards.  These include:


  • Bright nickel chrome plating or polish
  • Zinc plating
  • Gold chromate treatment
  • Anodizing
  • Heat treatment
  • Annealing
  • Epoxy powder coating
  • Polymer powder coating
  • Plastic dipping (PVC, PE)



Fan guards can be used for a wide range of applications, including:


-Computer case fans and other electronic cooling fans designed to cool electronic devices. Common sizes include 40, 60, 80, 92, 120, and 140mm.

-Industrial exhaust fans that draw air out of a building or workspace that may be contaminated with smoke, noxious gases, fumes, and other undesirable components.

-Process cooling fans designed for use in large scale industrial process equipment such as heat exchangers, cooling towers, process dryers.

-Material handling or pneumatic fans used to propel granular materials such as plastic resin pellets, grains, and powders between storage containers and to production equipment.

-Heating, ventilating, and air conditioning (HVAC) fans such as plenum fans and duct fans that move air in buildings and enclosed environments.


Image credit:

Keystone Electronics


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