G60 G40 Grinding Steel Ball 62.98mm 62.94mm 63.06mm for power plant

Product Specification

62.98mm(2.4795275"), 62.94mm to 63.06mm, grinding steel balls for bearing, G40 Or G60
 
Descripton
 
High-carbon chromium bearing steel is widely used in the world, the most commonly used types are GCr15 and GCr15SiMn, the performance of the two kinds of steel is basically the same, but the quenching permeability of GCr15SiMn is better than GCr15, so for larger size bearing parts, should adopt GCr15SiMn steel, high-carbon chromium bearing steel is widely used in the manufacture of rolling bearing rings and rolling parts.
 
GCr15 bearing steel is widely used to manufacture spindle bearings, railway bearings,engine bearings, machine tools bearings, mining machinery bearings, general machinery bearings etc.
 

GCr15SiMn bearing steel is mainly used to manufacture thick wall bearings, such as large and extra large size bearings, used in heavy machinery and rolling mill machinery.
 

Material Characteristics
 
Found primarily in ball bearing designs and a variety of demanding industrial applications. A vacuum-degassed AISI E52100 chrome steel is used to obtain a superior ball with a fine surface finish, through-hardness and high load capacity. Also available in consumable electrode vacuum melt material.
 
Grade and Tolerance
 
Grade: A specific combination of dimensional form and surface roughness tolerance. A ball grade is designated by a grade number.
Ball Diameter Variation: The difference between the largest and the smallest actual single diameter of one ball.
Lot Diameter Variation: The difference between the mean diameter of the largest ball and that of the smallest ball in the lot.
Nominal Ball Diameter Tolerance: The maximum allowable deviation of any ball lot mean diameter from the nominal ball diameter.
 
Ball Diameter
 
Nominal Ball Diameter: The diameter value that is used for the purpose of general identification of a ball size, e.g., 1/4“, 6mm, etc.
 
Ball Gauge: The prescribed small amount by which the lot mean diameter should different from nominal diameter, this amount being one of an established series of amounts. A ball gage, in combination with the ball grade and nominal ball diameter, should be considered as the most exact ball size specification to be used by a customer for ordering purposes.
(For the specified small quantity, the average batch diameter should be different from the nominal diameter, which is one of a series of determined quantities. The combination of ball gauge, ball grade and nominal ball diameter should be regarded as the most accurate ball size specification used by customers for ordering purposes)
 
Specific Diameter: The amount by which the lot mean diameter differs from the nominal diameter, accurate to the container marking increment for that grade. The specific diameter should be marked on the unit container.
 
Container Marking Increment: The standard unit steps in micrometers or in millionths of an inch, used to express the specific diameter.
 
Surface Qualities
 
Surface Roughness: 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.
 
Waviness: The more widely spaced circumferential component of surface texture.
 
We mainly produce chromium steel with a size of 7.9375mm to 82.55mm. The main material is high chromium GCR15 or GCR15SiMn.
The ball has high precision, good surface smoothness, standard hardness and excellent wear resistance. Our products have been widely exported to Europe, America, Japan, Korea etc.

 
  
Parameter
 

 
 
Material Analysis of GCr15