{"data":{"fields":"term_definition","term_definition":"<div class=\"definition\">TO FIND HAVING RULE 1 Transverse Diametral Pitch Number of Teeth & Pitch Diameter Divide the Number of Teeth by the Pitch Diameter 2 Transverse Diametral Pitch Normal D.P. & Helix Angle Multiply the Normal D.P. by the cosine of the Helix Angle 3 Pitch Diameter Number of Teeth & Transverse D.P. Divide the number of Teeth by the Transverse D.P. 4 Normal Diametral Pitch Transverse D.P. & Helix Angle Divide the Transverse D.P. by the cosine of the Helix Angle 5 Helix Anlge Transverse D.P. & Normal D.P. Divide the Transverse D.P. by the Normal D.P. - Quotient is the cosine of the Helix Angle 6 Transverse Pressure Angle Normal P.A. & Helix Angle Divide the tangent of the Normal P.A. by the cosine of the Helix Angle. Quotient is tangent of Transvers P.A. 7 Normal Circular Tooth Thickness Normal Diametral Pitch Divide 1.5708 by the Normal Diametral Pitch 8 Addendum Normal Diametral Pitch Divide 1 by the Normal Diametral Pitch 9 Outside Diameter Addendum and Pitch Diameter Add 2 Addendums to the Pitch Diameter 10A Whole Depth (Coarser than 20 D.P.) Normal Diametral Pitch Divid 2.250 by the Normal Diametral Pitch 10B Whole Depth (20 D.P. and finer) Normal Diametral Pitch Divide 2.220 by the Normal D.P. and add .002 11 Clearance Addendum and Whole Depth Subtract 2 Addendums from the Whole Depth HELICAL GEAR FORMULAS<\/div>"}}