drill size

[squbti]

hi Ginge,i´m making my own mushrooms & they are looking good . i have drilled the offset holes with a 12mm drill & was going to go up to 15mm before tapping them but wasnt realy sure.
cheers
samy

[gingea1pom]

Samy,

I’ll wined my neck in then as I purchased/cheated.

Cheers Ginge

[SeriesLandy]

Originally Posted by squbti

hi Ginge,i´m making my own mushrooms & they are looking good . i have drilled the offset holes with a 12mm drill & was going to go up to 15mm before tapping them but wasnt realy sure.
cheers
samy

15mm for the hole is correct, then ream out so the top is 17mm.

Not sure if you have the drawing but it's in there.

Mushroom inserts.pdf