Plastic filament won't work for bearings here, because the bearings must move freely on rods even when twisting pressure is applied.
My main problem is a dire need to make 8 mm bearing seals that actually fit the 8 mm rod. The silly rubber seals that come with cheap bearings have a gap wide enough to allow tiny particles into the bearing.
Any ways to make close-fitting but easy sliding bearing shields out of whatever material?
Thanks.