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Old 19-02-2015, 12:17   #16
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Re: Repair by welding? Or find obscure part?

I hope if he welds it he at least makes a double. Lots of good ideas on this forum, including going to a machinist forum to get help. Thanks MD!
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Old 19-02-2015, 13:23   #17
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Re: Repair by welding? Or find obscure part?

This part was badly designed. The junction of the broken stud and the larger cylinder looks square. It should have a large radius. However you repair this you need to end up with a large radius blending the stud into the cylinder body. Because (I assume) you are using 300 series stainless, there will be no loss is strength from welding as 300 stainless is not heat treatable. You can either drill a hole in the existing cylinder and have a new stud welded in, with the weld forming a good radius around the stud, or you can have a new part machined. Assuming the welder is good, either will have similar strength properties.

If you can change your set up to eliminate the bending loads which I assume failed this part it would be well worth while.
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