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RNDinov8r
in reply to: johnster100

So what you see there, are two styles of dowel pin holes..one for thru holes (or blind) and one for holes with breathers. Say for example I put a Ø10mm dowel pin that is a press fit into a 50 mm thick piece of metal...I don't want to bore a 10mm hole all the way thru, so using the C'Bore feature, I can set my C'bore to the dowel pin hole size, then set a depth, and then the breather hole is just a smaller thru hole. My hole note can then tolerance the breather hole to say, ±.010" while the dowl pin hole is held to within 0.001".