Quote Originally Posted by Clive S View Post
This is getting silly now just use standard cap head bolts like everybody else dose
i dont mean to make this thread all pointless and silly, i have no real experience when it comes to cnc or mathmaticals unless its your typical diy timber frame that any dummy can do. now the cap head bolts was what i was using but then the shoulder screws came into it :). now ive read hundreds of threads and love them all and watched plenty of videos to know that there cant be any play in the machine regardless if its just cutting wood or aluminium so this is the reason why i asked about clearance hole size because when looking at the drill tap and clearance chart it tells me the clearance for an m8 bolt is 8.4mm but the bolt is 8mm so i asked if 8.1mm clearance hole would work and then i got told id get tolerance issues. everyone who is helping me here has their reasons and know what they are doing and i apologise for confusing people :)

Ash