[AT] List quiet!! Everyone OK, or just waterlogged??? --> Lug bolts, JD A

[Moe Fretz]

Flywheel ring gears??

$-------&
Moe Fretz

L'Orignal
Ontario, Canada


On Thu, Jul 4, 2019 at 3:10 PM John Hall <jtchall at nc.rr.com> wrote:

> Been loosely following this, don't believe I have seen starter gears
> mentioned--thats about as tractor related as you can get.
>
> John Hall
>
> On 7/4/2019 2:48 PM, szabelski at wildblue.net wrote:
> > Another good example would be how they make spoked wooden wagon wheels.
> After all the pieces are put together they heat up the metal ring to expand
> it, then cool it off with buckets of water after it’s in place to shrink it
> back down (and before the whole thing burns up).
> >
> > ----- Original Message -----
> > From: Stephen Offiler <soffiler at gmail.com>
> > To: Antique Tractor Email Discussion Group <at at lists.antique-tractor.com
> >
> > Sent: Thu, 04 Jul 2019 07:02:28 -0400 (EDT)
> > Subject: Re: [AT] List quiet!! Everyone OK, or just waterlogged??? -->
> Lug bolts, JD A
> >
> > Yep.  The washer example is a great way to explain how thermal expansion
> > works on holes.
> >
> > SO
> >
> >
> > On Wed, Jul 3, 2019 at 3:31 PM <szabelski at wildblue.net> wrote:
> >
> >> No. Thermal expansion is constant.
> >>
> >>   Consider a flat washer. If you heat it, it will expand on the outside
> and
> >> get larger because the molecules are separating due to the heat. The
> outer
> >> circumference is now bigger.
> >>
> >> Likewise, the inside expands due to the heat and the internal
> >> circumference becomes bigger by the same ratio.
> >>
> >> Think of what happens to the outer edge. The outer edge gets longer so
> the
> >> diameter becomes bigger because it remains circular. Now apply the same
> >> thought to the inner edge. It gets also gets longer, so again the
> diameter
> >> becomes bigger because it remains circular.
> >>
> >> The washer also gets thicker due to the heat.
> >>
> >> Have you ever seen someone replace the lower pulley on a Farmall Cub?
> You
> >> really have to put a lot of pulling force to get it off of the
> crankshaft.
> >> In order to get it back on, you have to heat the pulley to somewhere
> near
> >> 300 degrees and press it onto the crankshaft. That’s why the crankshaft
> is
> >> threaded on the end so you can use a 3/4 inch bolt and washers (or some
> >> other spacer) to press it on.You have to make sure both pulleys line up
> >> properly, so you need to get it right while the pulley is hot enough.
> When
> >> the pulley cools you can’t just tap it back and forth to line them up,
> it’s
> >> on there good.
> >>
> >> There are also cases where bearings have to be heated in order to get
> them
> >> onto a shaft.
> >>
> >> ----- Original Message ----
> >> From: Mike M <meulenms at gmx.com>
> >> To: Antique Tractor Email Discussion Group <
> at at lists.antique-tractor.com>
> >> Sent: Tue, 02 Jul 2019 12:29:37 -0400 (EDT)
> >> Subject: Re: [AT] List quiet!! Everyone OK, or just waterlogged??? -->
> Lug
> >> bolts, JD A
> >>
> >> Wouldn't heating the "hole" cause the steel to expand making it smaller?
> >>
> >> Just curious.
> >>
> >> Mike M
> >>
> >> On 7/1/2019 9:10 PM, szabelski at wildblue.net wrote:
> >>> When applying heat you want to heat the item the bolt in threaded into,
> >> not the bolt.
> >>
> >>
> >> ---
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> >>
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