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Something today from history.
V.
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I'll have to dig on that and see if they even had torque wrenches then... I'm sure they must have...
V.
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A torque wrench is a tool used to precisely apply a specific torque to a fastener such as a nut or bolt. It is usually in the form of a socket wrench with special internal mechanisms. It was invented by Conrad Bahr in 1918 while working for the New York City Water Department. It was designed to prevent overtightening bolts on water main and steam pipe repairs underground.
from wikipedia, huh what a wonderful site that. In one of my systems I have frit bonded inserts that have a 450 Lb pull break strength, but if you torque them at only 10 inch pounds they will break out! and in other parts I need to use $3 bolts that are cadmium plated or they will gall in the threaded insert threads....fun specs!
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It's all about root threading, depth and pitch.
Heaven help those who mix US and British threading units...
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Again, I'm learning stuff here. Man, wondering about those cobbled together engines, too.
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it was a way of life P... one of the things that killed the steam engine was the major components were all made to fit. That took time and machinists who knew what they were doing.
V.
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Link
wirez
ah the importance of torque specifications!