Hobbyman2 wroteYears ago in the shop we had a table that had small holes in it maybe 1/16 in or so dia , on the under side there was flat duct work with a vacuum connected to it , when you turned on the vacuum the table actually held down the work project ,flip the reverse switch and the sheet would float like a air hickey table , just wondering if this could adversely effect the motor on a dust collector,, or if any one has tried this .
A dust collector and a shop vac are basically the same thing. A motor and an impeller. The only difference is air flow. The air is what puts the load on the motor. If you reduce the amount of air the impeller is moving the load on the motor is reduce and the motor speeds up. That is why when you block the hose on your shop vac the noise increases. It is not working harder it is running faster because the load is reduced. If you run a motor with an impeller in a vacuum there is no load on the motor.
As long as the motor is rated continuous duty it should actually help the motor.
