Mibei Lot Diameter Variation The difference between the mean diameter of the largest ball and that of the smallest ball in the lot. The principal terms, quantitative symbols and definitions used in this Standard shall be as follows. The method of evaluating the deviation from spherical form of a steel ball shall be in accordance with JIS B appendix A. Measured by two parallel plane tangent to the surface of the ball. The radial distance between the smallest circumscribed sphere and the greatest inscribed sphere, with their centers common to the least squares sphere centre.

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Shamuro Grade A specific combination of dimensional form and surface roughness tolerance Nomintal ball Diameter The diameter value that is used for the purpose of general identification of a ball size. A specific combination of dimensions, form, surface roughness and sorting tolerances. Waviness components on jks surface of a ball are usually measured with a waviness-meter using a filter. The mean diameter of a ball shall be obtained in the form of the arithmetic mean of the largest and smallest actual b diameters, and the ball diameter variation shall be obtained in the form of the difference between the largest and smallest actual single diameters.

The arithmetical mean jls the mean diameters of the largest ball and the smallest ball in a ball lot. This term is applicable to case hardened ball only. A definite quantity of balls manufactured under conditions presumed uniform and which is considered as an entity. Case Depth The distance measured radially from the surface of the ball to the point where the ball hardness becomes Rc The various types of deviation from the perfect spherical ball surface, uniformly or non-uniformly distributed and repeated around the jjis surface.

The ball diameter variation, sphericity and surface roughness of the steel balls shall comply with Attached Table 2. The hardness of steel balls larger than 3mm shall be measured in accordance with JIS Z The radial distance between the smallest circumscribed sphere and the greatest inscribed sphere, with their centers common to the least squares sphere centre.

Hardness The measure of resistance to penetration of the ball surface or truncated flat of the ball by a specific indenting shape. Ball grade is indentified by the letter G and a number. And it is conventionally defined within the area where deviation of form are eliminated. Diameter Tolerance The maximum allowable deviation of any ball mean diameter from the nominal ball diameter. Surface Roughness Surface b consists of all those irregularities such as crack,cuts and dent,which surface relief.

The principal terms, quantitative symbols and definitions used in this Standard shall be as follows. Lot Mean Diameter The arithmetical mean of the mean diameter of the largest ball and that of the smallest 1b in the lot.

Lot Diameter Variation The difference between the mean diameter of the largest ball and that of the smallest ball in the lot. Our trained engineers also work closely with our customers to develop products most suitable for their applications. The designations which is used for the purpose of general identification of a steel ball by dimension. The diameter necessary for determining the mean diameter of a ball and the ball diameter variation shall be measured with the ball placed between the horizontal plane and the stylus applied vertical to it from different directions.

Element, irregularity or group elements and irregularities of the real surface, unintentionally or accidentally caused during manufacture, storage, handling or use of the surface. The method of evaluating the deviation from spherical form of a steel ball shall be in accordance with JIS B appendix A. This Japanese Industrial Standard specifies requirements for finished steel balls for rolling bearings. Sphericity The greatest radial distance in any radial plane between a sphere circumscribed around the ball surface and any point on the ball surface.

Mean Diameter of a Ball The arithmetical mean of the largest and the smallest single diameter of the ball. Measured by two parallel plane tangent to the surface of the ball.

Lot is the definite quantity of ball manufactured under uniformed condition. The amount by which the mean diameter of ball lot should differ from the nominal ball diameter, this amount being one of an established series. TOP 10 Related.

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Fenriktilar Surface Roughness Surface roughness consists of all those irregularities such as crack,cuts and dent,which surface relief. The ball diameter variation, sphericity and surface roughness of the steel balls shall comply with Attached Table 2. The arithmetical mean of the mean diameters of the largest ball and the smallest ball in a ball lot. Sphericity The greatest radial distance in any radial plane between a sphere circumscribed around the ball surface and any point on the ball surface.

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Shamuro Grade A specific combination of dimensional form and surface roughness tolerance Nomintal ball Diameter The diameter value that is used for the purpose of general identification of a ball size. A specific combination of dimensions, form, surface roughness and sorting tolerances. Waviness components on jks surface of a ball are usually measured with a waviness-meter using a filter. The mean diameter of a ball shall be obtained in the form of the arithmetic mean of the largest and smallest actual b diameters, and the ball diameter variation shall be obtained in the form of the difference between the largest and smallest actual single diameters. The arithmetical mean jls the mean diameters of the largest ball and the smallest ball in a ball lot. This term is applicable to case hardened ball only.

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