And you think I am gonna do something stupid.ISO 17842-1:2015, “Safety of amusement rides and amusement devices —Design and manufacture”, etc. Go talk to the latest manufacturers of the ride or a PE. “Specifications should match the manufacturer’s instructions.” There‘s a lot packed into safety design requirements for component replacements, and failure analysis includes two forms, “general safe state failure and dangerous failure.” The bushings might be important and their undoing might precipitate other stresses causing failures, eventually. Seems there’s a number of Spider and Spider-type carnival ride failures.
2002 Columbus, OH
* “[Spider-like Spinning] cars rotate in groups of three at the end of spider-like arms, which spin at a top speed of 24 mph. The men were thrown about 20 feet from the ride. Both were treated for injuries and released.
"We started off slow and then picked up momentum and Jim says, 'Well, it looks like this is going to be a fun one,"' said Dennis Nielsen, whose head was bandaged and his right eye swollen. "I feel sore all over."
I wouldn’t put my kids on a carnival ride w armatures spinning that’s been built using forum-advised parts, as minor or ‘insignificant’ as the components might be thought to be, even if gotten right. However, suggestions are a good talking point to discuss w those who would sign-off on replacements to conform to and meet inspection requirements.