Originally Posted by
onehundred80
If the plates were themselves balanced then laying them on a knife edge which passed through the centre of the pilot hole the plate would balance.
With the patterns being offset it would not but I guess adding the screws counteracted the imbalance.
You must have done an accurate job of machining to achieve the balance at 110mph.
The plates I started with where not perfect flat, except perfect round.
I milled the plates perfect, then took to a machine shop, they screwed them up extremely bad and where unusable, so I milled down 4 more plates and took them to a shop and had just the pilots put in there cnc, then I did the rest, $50 for both pilots put in all 4 plates, I used a 18mm end mill for the recess for the cap cap bolts, all to perfect and exact same depths, to keep balance.
the 4 threaded holes are 3/8 fine thread, I wanted to do myself, then I know the threads would be perfect.
thickness of plates are exact.
diameter is exact, and pilots are exactly centered
all holes are exact spacing, dimensions and depths.