Quote Originally Posted by reefy86 View Post
how much room play do you leave when drilling and tapping? for example i am using 20mm linear rails on the z axis and the screw clearance is 6mm so i would need to use smaller bolts then 6mm to make room for alignment.
I made a huge error when drilling/tapping my first plate. Went with m6 as the holes were 6mm and chinese drawing said m6 holes.
Turns out that m6 boltheads couldnt fit the countersink in the rails :D
So use m5 bolts, 4.2mm drill..
That gives you 1mm adjustment.
Done correctly thats plenty ;)

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