quote Buccaneer:
I looked up “Spherical Radius”……… no idea what they said….
Try and vision the Welch plug being a chunk taken out of a metal ball, which has a diameter of 2 1/16" or a radius of 1 1/32".
The plug is round, like a coin, but the convex surface is rounded to, in the other direction. Or better yet, if you ever change lifters in your vehicle, the bottom of the new lifter isn’t flat. It has a slight convex shape to it so the lifter will rotate and not wear on any one surface, like this one ground with a radius of 50".
Attachments:
