It does have bolts in it also, but the owner of the company wants to weld the bearing down to the chassis also. They have had prior slew bearings brake free from the truck....thus the additional welding requirement.
I agree...will hire NDT services.
Will be setting up a QWP and welders onsite are prequalified. The 4140 bearing( 1 1/2" thick ring) will be welded to the truck frame - 3/4" mild steel
I see in my AWS welding handbook that the tensile strength on 4140 drops significatly as tempering temp...
Yes. this is the problem. We have been asked to consult on the new welding and install. The old install and its weld process was done 4 years ago and there are no records. No NDT was done either that I am aware of. Rotek brg company advised/ had them preheat to 400 deg with a rosebud. Thermal...
What considerations should be looked at when rewelding on a 4140 4' dia. steel slew bearing that is being relocated from one drill rig to another?
Concerned that the heat effected zone on the initial weld on the bearing metal has made the area too hard now. Will be testing its brinell hardness...
