Ha ! the big question again….
Would heat shrink the inside diameter of the bracket threads….. allowing the shaft threads to pass more freely or….
would heat expand the inside diameter of the bracket threads…. preventing the threads from passing more freely
based on the ball in the hole experiment below …. heating the bracket fast enough BEFORE the shaft also heats up and expands
should allow the shaft to rotate more freely. Freeze spraying the shaft while heating the bracket would likely help.
what about just freeze spraying the shaft ??
would it shrink the diameter of the shaft threads allowing the shaft threads to pass more freely ? maybe
see text below…. borrowed on Internet….and a test I did in high school many moons ago
Thermal Expansion – Ball And Hole
Purpose
To illustrate thermal expansion in a paradoxical way.
Equipment
Metal ball and hole on handles, burner with matches.
Suggestions
Before performing the experiment students are asked:
When the plate is heated, will the hole get bigger, smaller, or stay the same size? Many people misinterpret the idea of expansion to believe that the plate will expand inward, making the hole smaller.
Images
Description
At room temperature the ball will not fit through the hole in the metal plate. When the plate is heated by a burner for about 30 seconds, the ball easily fits through the hole.
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