A Study of Gear Hobbing : Chiefly on Cutting Hard Gears

Abstract

In making an efficient production of gears of high performance, it is considered best to have them hobbed and finished by shaving, with material of gears as hard as possible provided it can be cut fairly well. In the present paper the authors have made theoretical and experimental studies of a hob with such form and material, as well as cutting oil, as give it the largest durability in cutting large and hard gears. This paper also deals with the form of a hob which reduces the fluctuation of cutting force.