Rolling bearing hardness

Regarding the hardness of the bearing, the inner and outer rings of the rolling bearing and the rolling elements are made of high-chromium steel GCr15 or GCr15SiMn bearing steel. The hardness of the finished bearing ring is in Rockwell HRC60-65; the hardness of the finished bearing rolling element is in Rockwell HRC60-66. Among them, the hardness of the steel ball made of GCr15 bearing steel is in the range of Rockwell HRC62-66; the hardness of the roller made of GCr15SiMn bearing steel is in the range of Rockwell HRC60-64 and steel ball in Rockwell HRC60-66. Maybe you don't know what Rockwell hardness HRC is. For example, the hardness of the blade of a household kitchen knife is generally around HRC50. The steel of surgical tools and military cutters should be pure and the hardness is also within the Rockwell HRC60. . The hardness of the alloy cutter head for machine tool metal turning is also about 62 to 65 in Rockwell HRC. The hardness of the rolling bearing is relatively hard, and the finished bearing needs to be further processed with special equipment and tools.