Quote Originally Posted by NewPaul View Post
Googled my own answer...

"Dimples on a golf ball create a thin turbulent boundary layer of air that clings to the ball's surface. This allows the smoothly flowing air to follow the ball's surface a little farther around the back side of the ball, thereby decreasing the size of the wake"

So... Nick, if I send you a thousand 9.5mm ball bearings, could you whack in a shite load of counter-sinks in each one in a uniform kind of way ?? You could use the swarf to make into pointy ones Damn , I should go into business
You need the TBT Ball Bearing sizer mk2. Sizes and dimples your ball bearing in one easy action (pat applied for). See another solution for a problem that doesn't exist.

Pete