When a pinion having a uniform meshing at no load, is torqued at one end, it bends and twists according to a known algebraic combined deflection ,the load distribution is proportional to the tooth deflection.

New load distributions can be calculated which can take into account alignment , bearing flexibility and thermal effects.

teeth_angle_correction_copy

It can be shown that the tooth separation for double helix gears is less than that for single helix gears.