On 4/29/2020 6:54 AM, Terry Coombs wrote:
Â* I'm repairing an aluminum part of a tiller for a neighbor , and
boy-o-boy is that a mess . This part is the main casting that carries
the tines and worm gear , and it's lots of fun to weld . I've been
welding a little then grinding all the crud out of the weld then welding
again . Takes about 2 grindings and the 3rd time I weld it I finally get
a fairly clean weld puddle . The biggest problem I'm having is keeping
the carbide burr(s) I'm using from loading up with soft fresh weld
material . I don't want to use any kind of lube on it to avoid causing
even more problems with contamination so it makes for slow work grinding
out the nasties . This project is not a cash job , he's going to do some
backhoe work for me in exchange . Good thing he doesn't need it right
now because it's slow going . Mostly because I'm getting interrupted by
the bees - they keep swarming and I'm barely keeping up with getting
equipment built to house the new colonies . Things are really poppin'
down here in The Holler !



How about a coated burr? Maybe ZrN or diamond. Do they even make
coated burrs?

Maybe add an air blast to keep chips out of the cut area. It helps with
machine cutting. Why not with manual cutting.