I'm an aeromodeller and have a small lathe.
I've made some venturis like the one in the photo.
The hole on the side of the venturi is threaded 4mm fine pitch.
What I need is a bit that will create a round flat recess around the 4mm hole so that the needle valve assembly will seat properly and...
Hi all.
I'm an aeromodeller and have a small lathe.
I've made some venturis like the one in the photo.
The hole on the side of the venturi is threaded 4mm fine pitch.
What I need is a bit that will create a round flat recess around the 4mm hole so that the needle valve assembly will seat...