Posted by Shane on April 07, 2021 at 07:36:45:
I have a 1960's Australian built Qualos no "0" hobber.
It cuts 5" dia by 3.5 in face up to 8 DP. Its not a big machine, 1/2 hp motor.
The production machines came with diffs, but for some reason my machine hasn't got a diff.
So I'm thinking about building one and inserting it in the final drive to the worktable just prior to the the table worm. This is the manufacturers position for the diff.
I have a choice of building a diff with bevel gears i can get from ebay etc. In this case the internal diff bevel gears will all be 1:1 ratio. However I will have to modify the diff housing to fit a 40:1 worm gear as per manufacturer specs.
Or I'm thinking about a diff from a 1/5 model RC vehicle. I think with 30cc engines these metal diffs might be suitable.
But what Im concerned about is that ... is the sun and planets ratios (1:1 in my case) any bearing on the diff constant?
Or is the diff constant derived from the hobber's internal gear train?
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