Gear relationsha=m. [ addendum depth]hf=m/4 [ dedundum depth]rp=(m*t)/2 [pitch circle radius]ra=rp+ha.. addendum circle radiusrf=rp-hf [ dedundum circle radius]rb=rp*cos(a) [base circle radius]rc=m*0.38 [filet radius]c=sqrt((1/cos(a)*cos(a))-1)/pi [Angle of the point of the involute that intersects the pitch circle.]

xc=rb*(sin(c*180)-cos(c*180)*c*pi) [ coordinates of involute curve ]yc=rb*(cos(c*180)+sin(c*180)*c*pi)phi=atan(xc/yc)+(90/t) [ angle used for making gear symmetric about z-x plane] Relations for pointssd0=rb*(sin(0*180)-cos(0*180)*0*pi) sd1=rb*(cos(0*180)+sin(0*180)*0*pi)sd2=rb*(sin(0.1*180)-cos(0.1*180)*0.1*pi)sd3=rb*(cos(0.1*180)+sin(0.1*180)*0.1*pi)sd4=rb*(sin(0.2*180)-cos(0.2*180)*0.2*pi)sd5=rb*(cos(0.2*180)+sin(0.2*180)*0.2*pi)sd6=rb*(sin(0.3*180)-cos(0.3*180)*0.3*pi)sd7=rb*(cos(0.3*180)+sin(0.3*180)*0.3*pi)sd8=rb*(sin(0.4*180)-cos(0.4*180)*0.4*pi)sd9=rb*(cos(0.4*180)+sin(0.4*180)*0.4*pi)sd10=rb*(sin(0.5*180)-cos(0.5*180)*0.5*pi) sd11=rb*(cos(0.5*180)+sin(0.5*180)*0.5*pi)