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• avoid corner breakage resulting from stress concentrations close
  to edges in shaft-hub joints
  

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• avoid notch effects and abrupt changes in the direction of forces

• floating fastening with small axial bores by means of
  tension rods or bolts
  
  o introduction of force over large area
  
  o limiting to
  compressive stress
  
  o remember to
  compensate for thermal expansion using spring
  methods of clamping