Making many off-axis (radially and axially) holes in the wall of a tubular cross-section

Jeff_37

Rank newbie here, hope this hasn't been answered elsewhere. I want to create a cyclonic cylindrical chamber, roughly 1' long and 1" outside diameter, 1/8" wall. I'd like to place 72 1/16" holes, in 12 rows of 6 (i.e., at 30 degree increments), evenly spaced around the circumference and along the axis. The challenge so far has been to figure out how to tip them five or ten degrees off-normal both axially and radially. I"m quite lost in trying to manage planes!  Any help is much appreciated.

andrew_troup

@Jeff_37
What you need to do is edit the distance down to the top row of holes in Sketch 3 to whatever you want, 
and change the vertical distance between rows of holes in Linear Pattern 1
Then go back and reduce the extrusion distance in Extrude 1 from 12" to 1"

andrew_troup

Try this

https://cad.onshape.com/documents/d3806fc8fe69441b8198d9d3/w/59810cfb61b64331afd214fc/e/09d67a9a8c064e8aa39bb43a



HTH

Jeff_37

Perfect! For what I asked for, which contains an error. I meant to write that it was 1" long not 1' long. Is this a trivial fix for you? For me, not so much …
Many thanks for the quick response,
Jeff

andrew_troup

@Jeff_37
What you need to do is edit the distance down to the top row of holes in Sketch 3 to whatever you want, 
and change the vertical distance between rows of holes in Linear Pattern 1
Then go back and reduce the extrusion distance in Extrude 1 from 12" to 1"

Jeff_37

Spoken like a true teacher - it's better I learn by doing it myself! Many thanks, again, Andrew.

andrew_troup