Rack bar and production method for the same

摘要

A rack bar (10) whose rack teeth (12a) are formed by disposing a die having a rack teeth-forming portion on an outer peripheral surface of a tubular member, and by inserting a pressing member into the tubular member. The tooth height of the rack teeth (12a) is at most 1.5 times the teeth bottom wall thickness and the helical angle is less than or equal to 20 DEG . <IMAGE>