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Caulculating Required Bolt Clamp Load
Dear Experts, 1st post!
I would like some help in determining what clamp load is required for a bolted joint between a gearbox flange and sprocket. Please see attached photographs.
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The reason for this is that I have been asked to review our bolt torques which previously had been compiled from a combination of experience and those used in similar ********** and also by referencing generic tables on the internet.
I am also told that when using Nord-Lock washer the torque should be increased to achieve the same clamp load due to the increased friction caused by the washer. I have also received conflicting advice regarding thread lock. Some people saying it acts as a lubricant and others that it increases friction?
I can get tests done on the bolts to show the relationship between torque and clamp load to see how much I should increase the torque by when used in conjunction with Nord-Lock washers or with the application of thread lock.
What I don't know is whether the torque values we have been using are correct in the first place and so would like to apply a bit more theory and calculation to substantiate these values. I believe the first step would be to determine what clamp load is needed to hold the joint in place and then to calculate the size and number of bolts required to resist the shear force?
Any help greatly appreciated.
Many thanks