I have never built one complete, but I have reworked many parts for the industrial
versions in my machining career. Those machines beat themselves up pretty bad.
When they were doing the cleanup after the hurricanes, the debris contractors sorted the different materials, wood, appliances, ect. Then it all went through a gigantic shredder. The shredder reduced the mountains down to mole hills.
Quite impressive to see.
Big shredder . Just today I was asked to go and see a 500Kw/680 Hp 400V. motor from a wood shredder that has a bearing problem. I have to get the shaft repaired and the windings overhauled. On Monday I'll post some photos.