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The Range
Ammo & Reloading
Why does muzzle velocity increase with barrel heat
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<blockquote data-quote="dennishoddy" data-source="post: 2189214" data-attributes="member: 5412"><p>When we remove large bearing races here at the plant, the inner race, and balls are typically destroyed, leaving the outer race. A welder will run a bead around the inside of the outer race, and the bearing race will just fall out.</p><p>When a new bearing is installed on a shaft, the bearing is put on a cone shaped heater that will expand the inner race, and allow the bearing to be dropped onto the shaft instead of having to be pressed in.</p><p>If a sleeve bearing is to be installed, its typically several thousanths of an inch oversize for the hole its to be put in. We put the sleeve in liquid nitrogen and basically drop it into the hole, boring out the ID to fit the shaft going through it when the temperature returns to ambient.</p></blockquote><p></p>
[QUOTE="dennishoddy, post: 2189214, member: 5412"] When we remove large bearing races here at the plant, the inner race, and balls are typically destroyed, leaving the outer race. A welder will run a bead around the inside of the outer race, and the bearing race will just fall out. When a new bearing is installed on a shaft, the bearing is put on a cone shaped heater that will expand the inner race, and allow the bearing to be dropped onto the shaft instead of having to be pressed in. If a sleeve bearing is to be installed, its typically several thousanths of an inch oversize for the hole its to be put in. We put the sleeve in liquid nitrogen and basically drop it into the hole, boring out the ID to fit the shaft going through it when the temperature returns to ambient. [/QUOTE]
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Why does muzzle velocity increase with barrel heat
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