4-40 ball cups=_ _ mm ?
01-29-2008, 04:46 AM
#1
4-40 ball cups=_ _ mm ?
Here's what's got me stumped: the likes of Lunsford, RPM, Losi have all got 4-40 ball cups.......but what does that equate to in mm ? ....and I'm assuming it is the inside measurement of the ball cup, right ?
01-29-2008, 05:09 AM
#2
Someone please correct me if im wrong, but 4-40 is a thread measurement. So i dont think that has anything to do with the size of the ball, unless that size thread on a ball cup always has a standard size ball with it.
01-29-2008, 11:03 AM
#3
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