Re: A Spec for Turning Brake Drums

Posted by Ross On 2018/7/9 15:33:32

The issue is diminished capacity for absorbing heat as the mass of metal is turned away. Thin drums heat up faster and will therefore fade more quickly.

The number of times they are turned is irrelevant. Thickness and diameter are relevant.

When we turn drums I always strive to remove the minimum amount of metal to achieve a decent surface even if that means some pits and grooves are still present. Many times a .005 cut will make a nice job.

.060 over means a .030 cut which is a bodacious amount of metal to remove from a drum. Only in the case of long neglect (that is using the rivets friction material) is such a cut necessary.