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Four post press design

Four post press design

Four post press design

(OP)
I am designing a lifting system similar to a four post hydraulic press. Is there a design "rule of thumb" for the bushing that ride on the post. I am worried about any side loading causing a moment that may bind the platten.

Ward Holloway, Jr, PE

RE: Four post press design

In general, to prevent a bushing from cocking on its shaft, use L/D > friction coeffient where L = length of bushing and D = ID of bushing.

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