Posted by Dick L on October 10, 2020 at 04:41:31 from (50.51.88.248):
1988, 1989, and 1990 I bought new 3 400 ton as well as two 220 Japanese molding machines. They are considered obsolete and parts are not stocked in the US anymore. From fatigue a 1 /14" pipe elbow to ferrell hydraulic pipe with a fine threaded nut. Bought fittings and high pressure pressure hose. Could not thread the 1 inch Japanese pipe as it is larger on the outside. Bought more fittings and threaded thick wall 1 inch pipe to match threads. 1 1/4' pipe fittings screwed in tight with a 4 foot pipe wrench still leak. Find the taper on Japanese threads has more taper and regardless how tight it is only on about three threads. No problem I"ll just re tap the threads with my 1 1/2" pipe tap. I have used my tap to tap out many Allis Chalmers B, C and CA exhaust manifolds. I always put that tap back every time in a tap drawer at home. (RIGHT) After a day of looking I found a new on in Auburn IN. 95 bucks later and another day gone by. Packed the tap with grease and it all is leak free after running the tap in to where it has all new threads on the proper taper. So the message is Japanese pipe fittings are the same thread with a steeper taper. I now again have a set to pipe taps from 1/8" to 2" in the same place. Two 1 1/2" and two 1" in the drawer. I might even find my lost 1 1/4" tap if I live long enough.
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Today's Featured Article - Third Brush Generators - by Chris Pratt. While I love straightening sheet metal, cleaning, and painting old tractors, I use every excuse to avoid working on the on the electrics. I find the whole process sheer mystery. I have picked up and attempted to read every auto and farm electrics book with no improvement in the situation. They all seem to start with a chapter entitled "Theory of Electricity". After a few paragraphs I usually close the book and go back to banging out dents. A good friend and I were recently discussing our tractor electrical systems when he stated "I figure it all comes back to applying Ohms Law". At this point
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