Internal clearance is the play between outer ring, inner ring and rolling element. The up and down movement of the outer ring in relative to the fixed inner ring is the radial internal clearance. The amount of right and left movement is the axial internal clearance. Bearing internal clearance is an important factor in any application that has a central influence on factors such as noise, heat, vibration and fatigue life. When measuring the internal clearance, the bearing is subjected to a standard load in order to ensure full contact between all parts of the bearing.