[deadlykitten]

what are some good tricks to mill straighter holes

hy john, there are a few tips spread across a few posts, but i also started a bit of off-topic conversation, making it hard for you to spot what you needed, so here it is :
... all ok until post 5 inclusive
... post 16 is ok

other tips :
... lower feeds, because higher feeds will mess the cilindricity
... low overhang
... "through hole + vertical reamer" is better than " blind hole + horizontal reamer "
... a toolholder with tir adjustment
... using a shorter go gauge, because longer ones require improved cilindricity
* in the end, is all about tolerances

this is all i can think of now / kindly