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| smiffy:
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 |
| smiffy:
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 |
| pycoed:
Now if that was me, half those teeth would have been welded the wrong way round :bang: |
| smiffy:
--- Quote from: pycoed 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: --- End quote --- I know exactly were you are coming from .I just hope I have them facing the right way Mike |
| smiffy:
A bit delayed but finished welding the gear today . Hopefully will have a trial fitting next week \ |
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