How radial loading affects fan life Radial
bearing loading is the largest factor in fan life -- especially in
wall fans. This is because radial loading directly affects bearing
life. Radial loading is minimized when the drive load is in
the same plane as the bearings. Radial loading is multiplied
dramatically as the load is offset from the bearings. This relationship
is usually expressed as L10 hours life -- a good indicator
of the useful life of the bearing -- a fan's most critical component.
Drive load centered between bearings
Zero
offset
(same plane)
American
Coolair design as used on Type CBL/CBH/CBHX fans
Typical
arrangement
found in most fans
The
American Coolair bearing/load arrangement will last at least 7½ times
longer based on L10 life calculations.
