[TheForge] repairing tapped sleeve

[Larry and Pat Brown]

Dan
Another trick I remembered is to use a rod that is the inside diameter of 
the thread, if you need to get a set of good strong threads. You will have 
to tap the whole edge when tapping but it would be stronger. You could go 
slightly undersized and threaded, as a compromise. Do you have access to a 
lathe?
Larry Brown


At 07:11 PM 2/11/2002 -0500, you wrote:
>Dan
>I take it that this is worn through from the outside in? You can take 
>copper or brass and thread it, screw it into the hole and weld the outside 
>to build it up. Weld a little, stop see if the copper is fused in, then 
>continue. I would start at the end and work out, re-threading the copper 
>if you have to. Afterwards re-tap the hole. Use a low penetration rod such 
>as 6013, do not use 6010 or 6011 or you will have to drill the copper bar 
>back out. A spray spatter guard on the copper might help also
>Larry Brown
>
>
>
>At 10:32 AM 2/11/2002 -0500, you wrote:
>>I have some machine parts that need to be repaired. They consist of a steel
>>sleeve that has the inside threaded to 5/8 NC and the wall of the sleeve is
>>worn completely away in some areas. I can cut out the sleeve and replace it
>>but that will be real pain in the neck. I tried to find some carbon rod that
>>I could thread and screw into the sleeve and then build up the wall with
>>weld. I haven't found any carbon that will work. I wonder if a copper rod
>>will work?  I looked at copper rod in the McMaster Carr catalog it shows a
>>melting point of 1981 deg F. I'm afraid that's too low. Any ideas?
>>
>>Thanks in advance, Dan Cruzan