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Tree Care Forums
Milling & Saw Mills
140” bar advice on bar sag
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<blockquote data-quote="KiwiBro" data-source="post: 6937621" data-attributes="member: 33374"><p>Regarding expansion, why does the bar have to be locked in between two fixed points? Why can't it be mounted such that it is free to move horizontally but ultimately the mounting uses something like valve compression springs to maintain chain fit as the bar expanded and contracts. Bar mount could be fixed but bar nose mounting could be sprung, for example. Or the other way around. Less deflection loads if the bar is not between two fixed points.</p></blockquote><p></p>
[QUOTE="KiwiBro, post: 6937621, member: 33374"] Regarding expansion, why does the bar have to be locked in between two fixed points? Why can't it be mounted such that it is free to move horizontally but ultimately the mounting uses something like valve compression springs to maintain chain fit as the bar expanded and contracts. Bar mount could be fixed but bar nose mounting could be sprung, for example. Or the other way around. Less deflection loads if the bar is not between two fixed points. [/QUOTE]
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