| 摘要 |
A tapered roller bearing (1) comprises an inner ring (2), an outer ring (3), a plurality of tapered rollers (4) rollably disposed between the inner and outer rings, and a cage (5) for holding the tapered rollers at predetermined circumferential intervals. In this tapered roller bearing (1), the roller coefficient {³= (the number ofrollers x mean roller diameter) / {À x PCD) } is greater than 0.94. At least one of the members, i.e., the outer ring, inner ring, and rolling elements, has a nitrogen rich layer. The grain size number of austenite crystal grains in the nitrogen rich layer exceeds number 10.
|
