Nice grinding. I think I would have welded it on and filled the gaps with weld instead of grinding.
That idea was considered. But I opted to grind it.
I have cut the 12" pipe into two halves. The trunnion outline was traced on to the pipe and cut out with a torch.
I will now grind the rough cut hole until the trunnion will slide in.
Then it will be welded on the inside diameter.
The second trunnion will start the contour process on the Bridgeport.
Then go through the same process as the first trunnion.
The pipe halves will be cut to final length after that and a flange welded on.
The finished trunnion in the picture started out as a 80 lb. 6" X 10" long piece of round bar.
That's 53 lbs. of waste cutoff of the original round!
I now estimate the finished collar will weigh about 75 to 80 lbs.
I knew from the very beginning that this project was going to have some very involved challenges but miscalculated on the amount of time it would take to finish the collar.
Still, I will get it done.
Just so everyone is clear, I have a friend helping me with the lathe and mill work. I don't have the skill nor the equipment to attempt this on my own.
I, however, will continue to practice my grinding skills.
More pictures to come.