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Linear bearings safety factor

Linear bearings safety factor

Linear bearings safety factor

(OP)
My supplier when I asked for loading information in relation to a application I had, has given me some detials I would like to cross check with others here. Where a bearing has loading in two different axes. He combined there loads to determine a safety factor. I am curious if it is correct, I have not done structural analysis since uni ( a bit embarrassing. Anyhow here goes.

In the x-axis a total load of 8333N is applied the maximum the bearing can take in this direction is 21,350N

on the y-axis a total load of 13,130N is applied the maximum the bearing can take in this direction is 30,500N

to determine the overall safety factor he did this

1/((8,333/21,350) + (13,130/30,500)) = 1.22

I assume this is correct I have no reason to doubt but have spent some time looking in old text books under combined loading to find a general formula or theory note that would explain the rather simple way of determining the safety factor for this combined load with no luck. Can anyone in layman terms explain this or point me in the right direction (make me feel better as an engineer) sorry I just a tad rusty on this stuff.  

RE: Linear bearings safety factor

Don't know, but considering the safety factor in the X axis is 2.5 and in the Y axis is 2.3, it seems a bit low to me.

Any reason why you need to combine them?  I would just use the lowest factor of safety if asked, i.e. 2.3

RE: Linear bearings safety factor

(OP)
They are acting at the same time as the forces listed are a result of a load eccentric to the bearings. i.e. Develops a overturning moment which can be represted as two forces in the x axis and one in the y axis.

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