Posted by Brian G on 14/06/2020 14:09:13:
Watermills and windmills used fruitwood such as apple for gear teeth, although this was running against cast iron. This website has a list of the properties of different timbers for making wooden clock gears, so it might be relevant.
Brian G
I remember sometime in the late 60s our village blacksmith recall that many years previously he had repaired the watermill gear with inserts made from Holly. The individual teeth were trimmed to fit the rim . I guess the logic was that the frame of the big gear was made of timber with a bit of resilliance but the teeth were hard wearing and easy to replace. Other than that it sounds like this lad is going to build a nice little bonfire.