3/4" bore by about 7/8" stroke. The flywheels are 3 1/2".
;D The hopper was a bit of a trick! Actually you cut the top opening and drill down to depth with a biggish drill, then insert a cuts-both-ways boring tool inside and undercut it as far as you dare - obviously leaves a round chamber under the square mouth, but not really noticeable. The same method is used to cut the water journal that encircles the 'wet sleeve' liner.
You could square a fair bit of the hopper using aT-slot/ Woodruff key cutter, whether it matters or not is up to whether you want to increase the water capacity. It looks good so far. Are the fly wheels iron or aluminium?isc
Thank you very much for the photos, usefull input it is.
My design will be like this :
I think you got an arbor holding shafts in your tool, I'm thinking of making a threaded hole to take shafts, and maybe a support stock for the free end of the shaft. Also I have made modification to a drill chuck to hold smaller pinions, I might get back with questions when I'm getting a little further with the project.
Yeah Mogens, mine takes either 2MT collets or the Myford chucks or faceplates. Also, of course, the 2MT mounted drill chuck on occasion. Your idea will work ok but it would be a good idea to split the spindle bearings, as has been done on mine - the rear one is adjusted and locked at the normal running condition, the front one locks the spindle up tight once you have indexed into position.