Personal Mini

At what speed to mini fans spin?
During the summer many people buy inexpensive mini personal fans to keep cool. At what speed does these fans spin at in general?
Fan Speed is normally measured in RPM (rounds per minute).
Those cheap fans for a pound of dollar have a speed of 500-800rpm.
A fan on your computer processor (this pentium thing you see on TV) has a speed about 1500-2000rpm.
The higher the speed (RPM) is the less noise is normally creates. However, the supporting equipment has to comply with the speed i.e. ball bearings...
How to Clean Personal Electronics : How to Clean Your Mini DV Camera
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US $199.00











every motorised Vehicle ran on Ball bearings Cars Trucks aircraft Boats ships Mptorcycles
Jet engines Rocket Launchers Field Guns
the worlds Biggest Supplyer of Ball bearings during ww2 Was SKF who supplied the NAZIS up to 1945
the US owned Factory supplied 90% of what they made to Germany throught WW2
Throughout World War II, Sosthenes Behn was an investor in the Swedish Enskilda Bank, chief financier of the colossal ball-bearings trust known as SKF. cousin Hugo von Rosen and William L. Batt, vice- chairman of the War Production Board, were directors of SKF in America throughout the war, dedicated to keeping South American companies on the Proclaimed List supplied with ball bearings.
thst were then sent to NAZI Germany
SKF controlled 80 percent of bearings in Europe alone. It also controlled iron ore mines, steel and blast furnaces, foundries and factories and plants in the United States, Great Britain, France, and Germany. The largest share of its production until late in World War II was allocated to Germany: 60 percent of the worldwide production of SKF was dedicated to the Germans.
Some indication of attitude toward the Allies can be gauged from the fact that while the [...]