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10-13-2019 05:36 AM  18 months ago

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10-13-2019 09:48 AM  18 months ago

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wjvail rrElite Veteran Meridian, Mississippi MyPosts All Forum Topic 💎Sustaining Member

The short answer is that I don't know what MA recommends. Whinging on... I would avoid placing the bearings at the "node" of vibration for the torque tube and the best way to do that is to space them slightly randomly. This is an instance where being too exact is a flaw. If your torque tube is 400mm you might be inclined to put a bearing at 100, 200 and 300mm. I would avoid that. Possibly put one in the center but don't put the other 2 equidistant between the remaining span. It should be enough to move them by 25mm. Realistically, with 3 bearing supports, you can put them anywhere you want. I find it humorous to note that in early models there was only one support and we put it in the middle. That lead to vibration so we added a second bearing. The bearings were equally spaced along the torque tube. In both instances the bearing(s) are placed at a node. Skip to 1:15. Watch at YouTube "Well, nothing bad can happen now."

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