If it ain’t broke don’t fix it… that said, it is IMHO a good idea to lube all spinning metal-on-metal contact areas, per Why you, yes you, should lube your yo-yo bearing
If it ain’t broke don’t fix it… that said, it is IMHO a good idea to lube all spinning metal-on-metal contact areas, per Why you, yes you, should lube your yo-yo bearing