Author Topic: water Mill restoration  (Read 1539 times)

Offline smiffy

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Re: water Mill restoration
« Reply #25 on: December 04, 2018, 01:03:24 PM »
I took the gear to the mill today to measure it up for fitting and against the old gear
Also took the chance to get some photos of the stones and drive gear
We have had quiet a lot of rain over the last few days and the weir has plenty of water
I will weld the teeth onto the gear tomorrow and hopefully get it mounted later this week
It is called a wallower gear as it is difficult to get it running square in both directions and  it wallows about  as it turns

 I will have to lift and turn the stones over to dress them  , They are french burr stones set in plaster of paris
 After the stones are dressed flat and the groves are recut they have to be balanced and leveled so that the gap is equal all around between the 2 stones .
This is done by placing lead weights in pockets on the top of the stones  The last picture shows the  lead weights
The bottom stone is stationary and the top stone turns . I will get some pictures of how it is adjusted at my next visit
 
Mike

Offline smiffy

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Re: water Mill restoration
« Reply #26 on: December 05, 2018, 03:42:31 PM »
After giving it some thought and coming up with all sorts of impractical solutions I decided that the easiest way would be to work out the circumference and divide by the no of teeth.

This sounds easy enough but in practice it takes a bit of juggling . The distance between the teeth was 56.81 mm and after  a couple of attempts at the marking out I tacked the teeth on . Final tolerance is + or - a gnats kneecap,

Tomorrow I will finish the welding
At last it is starting to look something like its supposed to.
Mike

Offline pycoed

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Re: water Mill restoration
« Reply #27 on: December 05, 2018, 03:51:48 PM »
Now if that was me, half those teeth would have been welded the wrong way round  :bang:

Offline smiffy

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Re: water Mill restoration
« Reply #28 on: December 05, 2018, 04:01:06 PM »
Now if that was me, half those teeth would have been welded the wrong way round  :bang:
I know exactly were you are coming from .I just hope I have them facing the right way
Mike

Offline smiffy

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Re: water Mill restoration
« Reply #29 on: December 12, 2018, 02:47:01 PM »
 A bit delayed but finished welding the gear today . Hopefully will have a trial fitting next week \

Offline ddmckee54

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Re: water Mill restoration
« Reply #30 on: December 13, 2018, 11:20:38 AM »
You're a braver man than I am.

I would have just left the teeth tacked on until after the trial fitting.

Don
Too many irons, not enough fire.

Offline smiffy

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Re: water Mill restoration
« Reply #31 on: Today at 07:32:23 AM »
I had 1 more job to do before taking the gear to the mill to fit . I drilled a hole in each of the 8 sections to allow water to escape as every few years the mill floods, some times to a depth of several feet .
I keep the slugs from the holes as they are easy to turn into thick washers  Always believe in   waste not want not

  Mike

Offline hanermo

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Re: water Mill restoration
« Reply #32 on: Today at 01:23:04 PM »
I am in awe.
How do You get the info/skills on what needs to be done ?

As for bearings ..
 the igus engineered plastic would probably be excellent, cheap, and they might comp You.
If You want, I could ask them.