On 3/9/2018 12:54 AM, Emanuel Berg wrote:
AMuzi wrote:

Aluminum is no good for a bike frame because
it's too harsh and stiff. Aluminum won't work
either because it's too soft and noodly.
That went on just forever with, as always,
much digression.

One on-topic question on aluminium/aluminum
I thought about asking is how do they cut the
pipes so to get those roundish forms so that
for example the top and down tube aligns so
well with the head tube?


What do you have handy?
A milling machine is fast if you're making a lot of miters
but a file works just fine for one:

http://www.yellowjersey.org/photosfromthepast/MAK8B.JPG

--
Andrew Muzi
www.yellowjersey.org/
Open every day since 1 April, 1971