Originally Posted by danedg
Sorry brother. I'm very bad about not thinking about how some of my posts come across at the other end.
I wasn't laughing at you, but more at what Vech told you.
It just doesn't make sense.
Yes, if you shave off huge amounts from the drum, you affect the circumferential position of brake shoe engagement (clock position of where the shoe touches the drum) but you would have to remove alot of metal before it became a serious concern.
In extreme cases of turning the drum you simply begin to lose some % of the pad engagement surface area, but this doesn't mean you can't turn the drums.
Single leading shoe and twin leading shoe designs all have a history of being successfully turned and still working quite well. I don't know which is more prone to symptoms from drum turning, but that certainly doesn't mean that the answer is "you can't do it."