... This hob tester is specially designed for checking the profile errors ofgear hob, worm gear hob and spline hob, radial error ... bore axis, lead error of flute, adjacentand maximum accumulated pitch errors in flute, as well as well as diameter andlateral runout of ... accuracy measurement, such as hob profile, necessary for hob manufacturing in the tool works.With aid of model 3802 hob lead ...