Originally Posted by
nashvillebill
Yep, swaging is essentially deforming the material,
Thanks - that would also explain the joint's strength variability between manufacturers using different swaging techniques.
I notice that on the bottom photo of the single speed crank, there's also some kind of key between the arm and the spider to keep things from slipping.
When I broke my crank I brought it in to the bike shop and the guy said "that's what happens to swaged cranks - they suck"... I guess he should've said "cheap" swaged cranks.