Go to the nearest lowes or HD with a tape measure the pullies on similar units .Failing that check your furnace blower pully sizes...mjh
I recently picked up a Lau blower fan and an electric motor at separate > garage sales.
>
> I want to use these two to make an air cleaner. The kind that hangs overhead
> and circulates air through furnace filters. This is something my shop really
> needs as the airborn dust can get pretty dense at times. I wear a filter
> mask when working there but the sawdust gets everywhere.
>
> In planning how to make such a beast I realized that I have no idea how fast
> the blower should be spun. The blower rotor/squirrel cage is 12" diameter.
> This is in a metal enclosure, of course. Can someone please suggest a
> speed to spin this? The motor is marked with its speeds so the issue is
> working out the size of the pulleys.
>
> Thanks in advance for your help.
>
> Patty
>
>