Hi!, this is my first post.
I have a six in length of 1Inch ID Mild Steel X 1/2inch wall tubing that is going to be my barrel receiver for a kingpin. It's going to be a boom swivel for a backhoe I'm making.
The HC 1inch pin fits perfectly in it right now with not too much clearance. The barrel will be boxed in a 5/16in plate retainer on each side and welded in(Lincoln Buzz box). There will be a 6inch welding seam running up each side of the barrel, as well as 2, 6inch seams seams up the front of the barrel. I will be making several passes of each seam as I only have 1/8-6011 (@ 105 amps) rod and I'm not that good a welder and this is going to be a very high stress point.
Looking at the barrel from the top, the welds will be 90 degrees from each other.
In retrospect it would have been better to have them bored 10/1000 over to compensate but some tell me even that may not help. Some say to mill out the center of the bore for about 2 inches giving only the tops and bottom of the barrel as bearing surface, but I'm trying to avoid the machine shop, and for full loads such as this I prefer every in of surface mating.
Is there a way to prevent distortion of the pin hole, or is this a serious concern? Is there a chance I need to rebore the hole after welding?
Would filling the barrel with Heat Block(TM) help prevent this.?
Thanks for the help.
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