How are holes dimensions on a cylindrical surface?
How are holes dimensions on a cylindrical surface?
(OP)
I am trying to check some drawings and I was never taught the proper way of dimensioning holes on a cylindrical surface. Like as if I were dimensioning the bolt holes for the top of a fire hydrant?





RE: How are holes dimensions on a cylindrical surface?
"Good to know you got shoes to wear when you find the floor." - Robert Hunter
RE: How are holes dimensions on a cylindrical surface?
I'll assume since you posted in ASME forum that you're working to the current ASME drawing standard - 14.5M-1994.
As such, take a look at Figure 5-24. Don't get hung up on the use of composite position tolerance but the general dimensioning scheme may be of assistance.
KENAT,
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