Consideration on the Drawing about Cone Roller Bearing

In the Standard of P.R.C 《 GB/T 4459.7-1998 Mechanical drawings— Representation of rolling bearings》,there is a convention in characteristic drawing of cone roller bearings.By contrasting the width of the drawing to the fact,the article points out two problems: to some cone Roller Bearings,the drawing can’t express the principle of a mechanical system in the assembly drawing;and is contradictory to the words in this standard.The paper provides some suggestions to solve the problem.