[TheForge] cast iron

Fri Aug 9 12:12:00 2002

It's a cast iron 5 spoke pulley that somebody welded on, maybe in hopes that
they could use a 3450 motor.
I have a  1725 with a 2" pulley, the original LG pulley is 10" which is
about right but the add-on makes it 13".
2 to 10 is 5x reduction, 345 beats per minute, a bit slow, but the 2" pulley
is really about 1 3/4 with the belts it's got.
2 to 13 is 265 bpm which is about what it's running (counting beats for
fifteen seconds, x 4) and it won't strike well at "full speed" because it's
not cycling at full speed. The outer pulley's got to go. Its not very well
balanced, either- you can see that the inner (original) is running true and
the outer is wobbling. The babbitt it rides on will have to be re-poured,
too, since the wobble made it old before its time.
Thanks, Peter- I'd forgotten about cutting with the welder since I got all
these other tools ;-)
Worth a try, since I'm going by Sid's soon.
Andy G.

> First, I doubt this pulley is making your unit run slow.  It does add mass
> and would affect startup but otherwise it would work as a flywheel.
>
> If this pulley is mounted between the bearings and you see a wobble,
> something more serious may be the problem.  It may be your shaft
> is not true
> and you can see the affect on the pulley.
>
> Is this a flat belt pulley mounted on the top shaft outside the bearings?
>
> What are you cutting, the shaft or are you cutting up the pulley?
>
> If this pulley is mounted on the outside, you can use a puller to
> remove it.
> If it's mounted between the bearings, you can remove the shaft
> and then take
> off the pulley and check your shaft.
>
> I think it will be easier to remove the whole pulley as a unit rather than
> cutting it off.  It would be better if you remove it all rather than just
> the spokes and rim.
>
> Walt
>
>
> -----Original Message-----
> From: Gladish Family <[email protected]>
> To: Theforge@Mailman. Qth. Net <[email protected]>
> Date: Friday, August 09, 2002 1:41 AM
> Subject: [TheForge] cast iron
>
>
> >Anybody got the secret to cutting cast iron?
> >Somebody back in the ancient mists of time added a dorky outer
> pulley to my
> >Little Giant, causing it to wobble and run too slow. I tried to
> cut it off
> >of there with the torch and it looked like it was going to make
> a mess, and
> >the sawzall isn't working either...
> >Andy G
> >
> > No matter what happens, somebody will find a
> >way to take it too seriously.
> >                        Dave Barry
> >
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