I have a 4.5” diameter aluminum spool running on a 1/4” 316 shaft with 9/16” flange and aluminum bronze bushing with 1/2” flange with approximately .001” clearance. The two flange faces make light intermittent contact with each other. I have relieved the flange face on the bronze bushing to reduce the contact area to two small rings. And the shaft is relieved in the middle to reduce overall contact.
The spool is retained on the shaft with a bolt which also makes light intermittent contact.
Similar commercial products will spin for 5-10 minutes with a solid spin and this spinning time is the end user’s judge of “quality” but right now I struggle to get 30 seconds.
I would prefer not to have to rely on the flange and bolt to maintain position but this application requires positive retention.
Does anyone have suggestions for how to reduce the friction in this application.
The spool is retained on the shaft with a bolt which also makes light intermittent contact.
Similar commercial products will spin for 5-10 minutes with a solid spin and this spinning time is the end user’s judge of “quality” but right now I struggle to get 30 seconds.
I would prefer not to have to rely on the flange and bolt to maintain position but this application requires positive retention.
Does anyone have suggestions for how to reduce the friction in this application.