Originally Posted by Tiggerdad
There is a theory that when welding on steel with bearings, an arc could create a spot on a bearing that would ruin it. It was thought that this arc would occur on any bearing between the ground and the welding point. In all the years I worked in the maintenance field, I never saw that happen, not even in babbitt bearings. Good welding practice would be to attach the ground as close to the welding point as possible.
Tiggerdad I disagree respectfully, I have had the pleasure of replacing bearings that some welder slapped his ground on the end of a large shaft and was welding on the draw works skid, arked the balls to the bearing race, these were very expensive bearings, needless to say the welder was skidded, your last statement is correct