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AFCA Forums > Antique Fan Collectors Association > Pre-1950 (Antique) > The direction of the brush arm and the direction of rotation of the motor

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The direction of the brush arm and the direction of rotation of the motor  Rate Topic 
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 Posted: Sat May 23rd, 2020 03:45 pm
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Dan Nguyen
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I think that on HC, C&C, CW fan motors and many other DC motors, the direction of the brush arm is closely related to the direction of the blade's rotation.  That's my thought, but I'd love to hear your comments on this connection.




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 Posted: Sat May 23rd, 2020 04:10 pm
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Dan Nguyen
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This is a C&C fan
The brush arm go from left to right and the arrow direction is the direction of rotation of the blade



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 Posted: Sun May 24th, 2020 12:32 am
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David A Cherry
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you are correct.. switching the top to the bottom or vice versa changes the direction of the motor.. also positioning of the brushes can reduce the speed, it's a matter of timing,,

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 Posted: Sun May 24th, 2020 01:57 pm
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Dan Nguyen
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I think it is the manufacturer's arrangement.
They do so to avoid the clash of commutator slots with brass brush heads while the motor is working.
If that happens, the commutator and brass brush will be broken.
If the fan motor is in the opposite direction of the brass brush, think of a plow blade plowing the ground

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