forked from: Star Class

Free Machinist Bolt Circle calculator circular flange bore

would like to add an input field where user can enter measurement
and the divide that by Math.sin((360/(NumHoles*2))*Math.PI/180) 
to calculate circle
my tabellenboek / machinist handbook says 
boredistance = circlediameter * sin(360 / (2 * numberofholes))

how do i clear old text? = solved by http://wonderfl.net/user/zahir
http://wonderfl.net/c/ttvx

http://www.luberth.com/plotter/ditwasplotter.htm

WARNING!!!WARNING!!!WARNING!!!WARNING!!!WARNING!!!WARNING!!!
if you do a websearch on Google for
Bolt Pattern Calculator, Common Wheel Bolt Hole Patterns 
Measure Wheel Pattern, Wheel Bolt Circle Dimensions 
Wheel Bolt Pattern, Flange Bolts Dimensions
Calculating Bolt Hole Patterns
a lot of shit fake virus html webpages come as result
infeecting your pc with annoying fake messages
fake virus warnings 
why is noone doing anything about this 
lock them up, take their money wich they stole from you
WARNING!!!WARNING!!!WARNING!!!WARNI