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Posted by Chris Case [75.36.37.114] on Thursday, February 21, 2013 at 15:44:14 :
In Reply to: Flywheel spacer, 360/Poly issue SOLVED! posted by Tom in Indiana [216.249.74.130] on Thursday, February 21, 2013 at 14:07:43 :
You already told us the weight is 19.8 grams, IIRC. You can see the holes or weights cast / drilled into then 360, so just do it your self.
Gee, if they are and drilled, just measure dia and depth, and drill away in the same location.
And some helpful formuls:
Volume of a cone is 1/2 the volume of the cylinder that it would fit inside of. Use this to figure the weight of the tip of a drill bit.
cast iron weighs .003 oz per inch, 1/2 inch diameter. so, if you are drilling 8" from center, you need to drill away 2 1/2 oz. At 10", only 2 oz.
That gives me about 3" of 1/2" holes. Do your own math, using weight of cast iron.
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