fixing hole centers

G

gbsurf

Member
hi all , completely new to this, got loads of questions, first one is , ...ive got an omnibus f4 v 3 pro fc board and a matek pdb board , now ive mounted them stacked on nylon spacers etc, my nest purchase is going to be a vtx board, i wanted to mount that on the stack aswell...but..my boards have 30mm x 30mm mounting centers, and after a bit of reserch that seems to be a bit odd.. all the vtx boards are 30.5mm x 30.5mm or 20mm x 20mm, what is the standard, ??why have i ended up with my fc and pdb board in 30mm x 30mm ???maybe there is an adaptor ?
cheers for now and thanks for reading...update...they are all 30.5mm x 30.5mm. !!!somewhere in the description of the boards that I have it calls them 30mm.30mm !! hence the confusion, ..anyways I'm sure this won't be the first time I'll make a fool of myself
cheers
m
 
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gbsurf

Member
No probs... It seems to me that it depends on the manufacturer.. Some say 30mm x30mm. Others call it 30.5mm x 30.5mm... Doesn't really matter. Point 5 of a mill isn't worth arguing about!!!.. I'll come across bigger issues than this... My next one is prop size... Thanks again. M.
 
wafflejock

wafflejock

Well-Known Member
Just heads up in the US at least "per mill" means one thousandth CNC people usually mean it as in .001" or one thousandth an inch. But yah in any case half a mm is super tiny think they are all actually 30.5x30.5 for hole spacing but simpler to label them 30x30
 
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