[GreenKeys] Model 15 casting repairs (JB Weld?)

[ken Schwieker]

Welding cast iron is more difficult as cracking close to the weld 
from heat stress can happen if casting is not properly pre-heated in 
an oven and slowly cooled afterwards.

I have had good results with JB Weld on cast metal by drilling 
opposing holes at the break and inserting a threaded rod piece in the 
epoxy in the oversize holes
before clamping the pieces together. On one occasion I drilled and 
tapped for the rod in one side and did the oversize hole with epoxy 
in the other.  I also found
making a small trench from the hole to the outside allowed the excess 
epoxy to squeeze out of the hole allowing easier clamping and a 
tighter fit. I would suggest
using the standard JB Weld rather than JB Kwik as 5 minutes can zoom 
by pretty quickly.

YMMV.

Ken S