DIYbanter - View Single Post - Repurposing an old blower motor for a grain mill

dpb

wrote:
....

So it is a 1/2HP, 1020RPM motor. Reading the side here, I see
"V200-230." So is this actually a 220V motor? I'm not so sure because
I see three jumpers labelled A through C:

A: LO
B: MED
C: HI

Which one I pick works in conjunction with the black contact to give
me my line voltage. So does this mean I have some flexibility in
voltage? It was connected to 'A' originally, and I haven't tried
messing with it. If this somehow lets me using 110V, then what effect
will this have on the horsepower and the rpm? I have yellow and black
lines going to a start capacitor rated 20.00/370.

It is a thermally protected motor and there's a note "CONT AIR OVER"
which implies to me it normally would be cooled by the blower fins. I
have to take that thing off to work this thing, so I'm wondering how
long I might reasonably expect to run the motor before it trips the
protection. I'd probably only need to run the motor 5 minutes to
crush my grain, if that helps.

I'd guess the L/M/H are multi-speed contacts for an HVAC-application
motor. The voltage rating certainly makes it appear it's rated for 200V.

My suggestion on connections would be to ask the folks you got it from
for some guidance.

On the cooling, it'll probably manage a few minutes at a time w/o
cooling anyway, although the load of a mill compared to that of an HVAC
fan may be significantly higher. What about figuring out an arrangement
to extend the shaft, perhaps?

Would have to agree w/ the other responder it might not be the most
suitable choice for the job, but may get it to work. You'll need to
gear it down quite a lot if the mill is designed for hand cranking
unless it really does have intentions for being powered otherwise the
bearings and all may not be up to the speed, either.

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