GustavinoBevilacqua, A question for every #machinist more skilled than me (just to avoid to write "all").
To support parts that have to be rotated wouldn't be better to have a machinist #jack with a rollers head, like photo 2, rather than with a flat head, like photo 1, which moves every time the part is turned?
Feel free to steal the idea if it's good!
Sources:
gear cutting: https://onion.tube/watch?v=UP3HzXcC6Pk
heavy duty roller stands: https://onion.tube/watch?v=av4E-ezc7LE
cc @mcdanlj @attoparsec @trevorflowers
A heavy duty roller stand supporting a long rod on the back of a lathe.