The difference between the largest and the smallest actual single diameters of the ball.
The prescribed small amount by which the lot mean diameter should differ from nominal diameter, this amount being one of an established series of amounts.
The difference between the lot mean diameter and the sum of the nominal diameter and the ball gauge
A specific combination of dimensional form and surface roughness tolerances. A ball grade is designated a grade number.
The distance measured radially from the surface of the ball to a point where the hardness becomes the equivalent of Rc 50. This term is applicable to case hardened balls only.
The greatest radial distance in any radial plane between a sphere circumscribed around the ball surface and any point on the ball surface.
The measure of resistance to penetration of the ball surface or truncated flat of the ball by a specific indenting shape as determined by specified methods.
A definite quantity of balls manufactured under conditions which are presumed uniform and which is considered and identified as an entity.
The arithmetic mean of the mean diameter of the largest ball and that of the smallest ball in the lot.
The difference between the mean diameter of the largest ball and that of the smallest ball in the lot.
The arithmetic mean of the largest and the smallest actual single diameters of the ball.
The diameter value that is used for the purpose of general identification of a ball size; e.g. 1/4", 6mm etc.
The maximum allowable deviation of any ball lot mean diameter from the Nominal Ball Diameter.
A chemical treatment to remove corrodible surface impurities and to provide a protective film. This term is applicable to corrosion resisting balls only.
The distance between two parallel planes tangent to the surface of the ball.
The amount by which the lot mean diameter differs from the nominal diameter, accurate to the marking increment for that grade.
Surface roughness consists of all those irregularities which form surface relief and which are conventionally defined within the area where deviations of form and waviness are eliminated.
The more widely spaced circumferential component of surface texture.