Comparing the Vortex Ball Roller to hand filing

[Maillemaker]

While the knurling is pretty uniform from my roller, since I double-dip the balls in Alox after the fact most of the voids are probably filled in. I don't think there is much aerodynamic impact here, if any, other than helping make a uniformly round ball.

I think the main benefit is the effective increasing of the ball's diameter in a way that is still deformable on loading.

Steve

[Hal]

Ought to easy enough to prove if someone wanted to do some experimentation. Shoot some smooth ones and some roughened/dimpled/knurled ones across a chrono and see if either of them prove to go faster under otherwise identical load and conditions.