US 12,006,975 B2
Duplex hardened cage pilot surface for bearing ring
Rick De Jong, Stratford (CA); Roland Plum, Stratford (CA); and Ben Baer, Denfield (CA)
Assigned to Schaeffler Technologies AG & Co. KG, Herzogenaurach (DE)
Filed by Schaeffler Technologies AG & Co. KG, Herzogenaurach (DE)
Filed on Mar. 5, 2020, as Appl. No. 16/810,340.
Prior Publication US 2021/0277948 A1, Sep. 9, 2021
Int. Cl. F16C 33/64 (2006.01)
CPC F16C 33/64 (2013.01) [F16C 2220/00 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A method of treating a bearing ring, the method comprising:
(i) applying a heat treatment to the bearing ring,
(ii) applying a masking treatment to the bearing ring;
(iii) applying a nitriding treatment to a raceway, rolling element guide surfaces located adjacent to the raceway, and cage pilot surfaces,
wherein the masking treatment is applied only to areas of the bearing ring away from: the raceway, the rolling element guide surfaces, and the cage pilot surfaces such that the raceway, the rolling element guide surfaces, and the cage pilot surfaces are exposed for step (iii), and
the cage pilot surfaces and the rolling element guide surfaces are each defined on radially outwardly extending shoulders of the bearing ring, and the cage pilot surfaces excludes axially outward facing surfaces of the radially outwardly extending shoulders.