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Topic Tag: stuck

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Hi.  I've been trying to build the injection machine, but am having problems.  Once, I weld the 2 mounting flat bars to the barrel, the plunger no longer telescopes.  (I did three small TIG welds on each mount.)  My first attempt ended with a stuck plunger.  My second attempt is also close to getting stuck, but I pulled the plunger out in time. I sanded the plunger and tried to hone the barrel with a brake cylinder hone (along with cutting fluid), but I don't think that the hone was coarse enough to increase the barrel diameter. Any suggestions on how to bore the pipe out?  Worst case, I can buy a third barrel, but is there a trick to reducing the pipe distortion during welding?
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