I recently purchased an older commercial dual barrel tumbler. nice old school made 3/4 driven shafts, bronze pillow bearings.
I pulled it apart as the driven wheels are all crumbling and shattering, expected with its age. looks like the factory might have casted/injected these.
I plan on making them myself, I require 8 and to speed the process up I figured the foundation of the bushing should be steel, I can pick up locally 3/4 ID x 1'' OD x 2L which is perfect as the stock ones were 2'' long and if I calculated this correctly it would give me .250 wall thickness to tap for grub screws to fasten to the driven shaft.
now, with the steel base I would want to make the wheels out of UHMW, can I simply make the ID 2 thou smaller and press fit onto the smooth steel bushing?
when I drill for the set screws I will drill everything at the end so the setscrew gets the UHMW and steel.
should I also use a 2 part epoxy when I press them together like JB weld?
I never worked with UHMW or similar, I am curious if they might slip on the steel bushing's while keeping the heavy tumbler barrels spinning. (yes the grub screws will stop this, but id rather no slip between the UHMW and steel bush to not stress the grub screw)
I pulled it apart as the driven wheels are all crumbling and shattering, expected with its age. looks like the factory might have casted/injected these.
I plan on making them myself, I require 8 and to speed the process up I figured the foundation of the bushing should be steel, I can pick up locally 3/4 ID x 1'' OD x 2L which is perfect as the stock ones were 2'' long and if I calculated this correctly it would give me .250 wall thickness to tap for grub screws to fasten to the driven shaft.
now, with the steel base I would want to make the wheels out of UHMW, can I simply make the ID 2 thou smaller and press fit onto the smooth steel bushing?
when I drill for the set screws I will drill everything at the end so the setscrew gets the UHMW and steel.
should I also use a 2 part epoxy when I press them together like JB weld?
I never worked with UHMW or similar, I am curious if they might slip on the steel bushing's while keeping the heavy tumbler barrels spinning. (yes the grub screws will stop this, but id rather no slip between the UHMW and steel bush to not stress the grub screw)
