On both direct drive and belt drive fans the motor has two bearings.
Difference between belt drive and direct drive fans.
In the former the motor connects to the fan wheel with nothing in between.
While belt drive turntables are incredibly popular they have a lower torque than direct drive turntables.
This is because of the fact that the amount of friction is greatly reduced in case of this fan when the fan is operating.
Either of these motor mount options can typically be found in wall mount exhaust and supply fans roof mount exhaust and supply fans inline duct fans and air circulation products our goal with this post is to cover some of the main differences advantages and dis.
There are some advantages and dis advantages direct drive and belt drive exhaust fans and supply fans have over each other.
Direct drive tables also will give you a speed control so as a dj if you want to change the tempo to blend one song into another with two turntables it is pretty easy to do so with the range of speed adjustment available on a direct drive table.
Direct drive fans have no power transmission loss since the propeller is directly connected to the motor shaft.
Belt drive fans have two additional bearings.
On a direct drive fan as implied by the name the fan propeller is connected directly to the shaft of the motor.
Belt drive turntables by contrast usually take several seconds to get up to speed.
Unlike the belt driven fans in case of a direct drive fan there is lesser energy loss.
Direct drive or belt drive.
Deciding between a direct drive fan and a belt drive fan is fairly straightforward once you know all of your other variables like fan size application space fan speed needs and likely wear and tear in your application.
Where on a belt drive fan the fan motor shaft has a pulley connected by a belt to a second pulley.
In the later there is a belt sometimes more than one connecting the motor to move the fan.
Belt driven fans offer greater flexibility in terms of rpm speed.
While torque isn t necessarily a critical quality it can be a deal breaker for some.
Direct drive fans should be designed for acceptable bearing life.
It s a motor connected to your fan in one of only two ways.
The two bearings on direct drive fan motors which are 7 horsepower and larger are typically regreaseable.
Belt drive turntables also have a slightly less accurate playback speed than direct drive turntables.
Over time a belt drive may need to be replaced.
Generally such fans are cheaper than direct drive fans of comparable size.
