| 摘要 |
The invention contemplates a major economy in the metal required for manufacture of an antifriction bearing ring, such as the outer race ring of a ball bearing, said economy being realized without loss of integrity of the race or its radial-load capability, as compared with a conventional all-metal race ring construction of equivalent capacity. Economy is realized by forming an insert from a cylindrical annulus of a deformable and hardenable material, such as ductile steel, the deformation being to create a ring of substantially uniform thickness but continuously concaved, at one of the inner and outer surfaces, to define the raceway contour. The deformation is to an extent producing a concave surface of depth exceeding the desired ultimate raceway depth. The deformed ring is hardened and then embedded in a body molding of plastic or elastomeric material, depending on ultimate use requirements. Race finishing, including the step of removing excess insert metal to create the desired raceway depth, can proceed before or after molding.
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