BS PD ISO/TR 10828:2015

In BS PD ISO/TR 10828:2015, thread profiles of the five most common types of worms at the date of publicationare described and formulae of their axial profiles are given.The five worm types covered in this technical report are designated by the letters A, C, I, K and N.The formulae to calculate the path of contact, the conjugate profile of the worm wheel, the lines of contact,the radius of curvature and the velocities at points of contact are provided. At the end the application ofthose formulae to calculate parameters used in load capacity calculations are provided.Cross References:ISO 1122-2ISO 701ISO/TR 14521BS 721-2:1983