JIS B Rolling bearings — Balls (Foreign Standard). standard by Japanese Industrial Standard / Japanese Standards Association. Standards and specifications are regulated in accordance with JIS B The nominal manufacturing sizes of steel balls are shown in the. JIS B Rolling bearings — Balls (Foreign Standard). Available for Subscriptions. Content Provider Japanese Industrial Standards [JIS].
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Lot Diameter Variation The difference between the mean diameter of the largest ball and that of the smallest ball in the lot. Lot is the definite quantity of ball manufactured under uniformed condition.
A specific combination of dimensions, form, surface roughness and sorting tolerances. The difference between the mean jiss of a ball lot and the sum of the nominal ball diameter and the ball gauge. Lot Mean Diameter The arithmetical mean of the mean diameter of the largest ball and that of the smallest balls in the lot. Sphericity The greatest radial distance in any radial plane between jiss sphere circumscribed around the ball surface and any point on the ball surface.
This term is applicable to case hardened ball only. The radial distance between the smallest circumscribed sphere and the greatest inscribed sphere, with their centers common to the least squares sphere centre.
Mean Diameter of a Ball The arithmetical mean of the largest and the smallest single diameter of the ball. Ball grade is indentified by the letter G and a number. Case Depth The distance measured radially from the surface of the ball to the point where the ball hardness becomes Rc Surface Roughness Surface roughness consists of all those irregularities such as crack,cuts and dent,which surface relief.
This Japanese Industrial Standard jus requirements for finished steel balls for rolling bearings. Hardness The measure of resistance to penetration of the ball surface or truncated flat of the ball by a specific indenting shape. The method of evaluating the deviation from spherical form of a steel ball shall be in accordance with JIS B appendix A.
Precision Hardened Balls – Metric / Inch | MISUMI | MISUMI USA
The arithmetical mean of the mean diameters of the largest ball and the jiis ball in a ball lot. 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. The hardness of steel balls larger than 3mm shall be measured in accordance with JIS Z The various types of deviation from the perfect spherical ball surface, uniformly or non-uniformly distributed and repeated around the ball surface.
The mean diameter of a ball shall be corrected taking into account the elastic approach value due to the measuring force and also, b150 s rule, the elastic approach value due to the mass of the steel ball. Iis principal terms, quantitative symbols and definitions used in this Jjs shall be as follows. Waviness components on the surface of a ball are usually measured with a waviness-meter using a filter.
The difference between the mean diameters of the largest ball and the smallest ball in a ball lot. The ball diameter variation, sphericity and surface roughness of the steel balls shall comply with Attached Table 2.
*NA BALL, STEEL JIS B(7 – na – Doosan spare part | parts
Element, irregularity or group elements and irregularities of the real surface, unintentionally or accidentally caused during manufacture, storage, handling or use of the surface. Measured by two parallel plane tangent to the surface of the ball.
Grade B101 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. The mean diameter of a ball shall be obtained in the form of the arithmetic mean of the largest and smallest actual single diameters, and the ball diameter variation shall be obtained in the form of g1501 difference between the largest and smallest actual single diameters.
Precision Hardened Balls – Metric / Inch
And it is conventionally defined within the area where deviation of form are eliminated. Our trained engineers also work closely with our customers to develop products most suitable for their applications.
A definite quantity of balls manufactured under conditions presumed uniform and which is considered as an entity. 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. Diameter Tolerance The maximum allowable deviation of any ball mean diameter from the nominal ball diameter.
The designations which is used for the purpose of general identification of a steel ball by dimension.