Posted by JD Seller on June 24, 2015 at 21:47:38 from (208.126.198.123):
In Reply to: Why not metric ??? posted by da.bees on June 24, 2015 at 20:17:02:
You may think metric is the way to go but it makes working on machinery a real PAIN!!! There are three "common" thread pitch standards in metric and 5-6 "special" pitches besides them. It makes the cost of keeping hardware to repair things be quite high. I keep two of the most common thread pitch standards and just those two make me have an extra $2500 in hardware that still does maybe 60% of the total "metric" stuff I work on.
I look at it the other way. Way back in the 1980s when this nonsense started we where easily the largest economy in the WORLD. Why the heck did the morons in charge think we needed to change to make all the "little" economies happy?????
So now we have a half breed system that has you having metric and English fasteners on the same machine. Don't think the stuff from the "pure" metric countries is all metric either. Many pieces have both on them as well.
Is there a metric Pipe thread???? I have never seen it if there is.
I worked evenings at a machine tool company in the early 1990s.One of the high ups thought that the change was so great he ordered all the drawing to be metric dimensioned only. Guess what. well over 50% of the machines in the entire plant where manual controlled machines. THEY HAD ENGLISH only hand wheels and such. So when you got a new drawing you had to set down and calculate every single dimension back to English. There was only ONE long bed lathe in the whole plant that could chase metric ball screws. They had to run it 3 shifts 7 days a week to met the demand. It took management several years to finally buy a few more Metric lathes.
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