function [ kb ] = Csize_Round_Rotating_m ( d )
% This routine computes the C size correction factor for round rotating
%  shafts.  The formulas apply only to bending.
%
%  d = diameter of the shaft in millimeters

if (d < 2.79)
    kb = 1.0;
elseif (d < 51)
    kb = 1.24 * d^(-0.107);
else
    kb = 1.51 * d ^ (-0.157);
end
        
end

