To provide a tapered roller bearing capable of increasing a static rated load only by an internal design change, without changing an outside dimension, without a risk of reducing strength of a cage.
This tapered roller bearing 10 has an inner ring 11 having a tapered raceway surface 16, having a small collar part 18 on the small diameter side of the raceway surface 16 and having a large collar part 17 on the large diameter side, an outer ring 21 having a tapered raceway surface 20, a plurality of tapered rollers 13 rollingly arranged between the raceway surface 16 of the inner ring and the raceway surface 20 of the outer ring 21, and the cage 14 retaining these tapered rollers 13 at an equal interval in the circumferential direction. The length L2 in the axial direction of the small collar part 18 of the inner ring 11, is set in a range of 3 to 10% of the length L1 of the tapered rollers 13. the small collar part 18 is coated with a metal before heat treatment.
YOSHIDA MASAHITO
Hironori Honda
Toshimitsu Ichikawa
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