[Shop-talk] Shop-vac $.02

[Karl Vacek]

My 1970 Dayton (Grainger) shop vac runs some air through the motor - the 
main airstream is exhausted just below the elevated case of the motor, and 
most of it spreads out radially, but a bit is drawn through the motor itself 
for cooling.

Karl



>> Unlike the Ridgid, the vacuum airflow does not go through the motor.
>
> WTF?  Even my cheap plastic Sears (not Craftsman) unit doesn't run suction
> air through the motor!  Dust even from common materials like flour can be
> very explosive and vacuum cleaner motors emit sparks.
>
> -- Randall