yet another thumb on its way

[workinallthetime]

put 300 hours of rocks and root balls on your thumb and let me know it it does. noticed today I had 421 hours on the b3030 man how time flies. i took my design and angles from countless hours of combing through the net and looking at real world examples. For a 110 mig with flux core wire i think it held up pretty well just not the hoe. I think the failure was due to picking things up that caused the dipper to twist, due to the fact that the metal was torn, and where it was tearing both times. The crack (s) apeared at the top of the plate that was welded on horizontally to the bottom of the dipper that the bracket was welded to. The welded on plate was clearly stronger than the metal in the dipper which caused the transfer of the "twist" to the top of the plate and into the dipper. If the holding bar angle was decresed and moved farther up the thumb this may help minimize the twisting force, however a smaller thumb with the "teeth" closer together would be a better way to lessen this stress.

non of this would of happened if i would have used a bolt on thumb lol:laughing: