Table 3.

Description of 7 working states of bearing.

Health status	ID	Damage area(mm2)	Damage depth(mm)	Label	Train size	Test size
Mild inner ring	IF_1	4	0.5	1	0.8	0.2
Moderate inner ring	IF_2	8	4	2	0.8	0.2
Severe inner ring	IF_3	12	2	3	0.8	0.2
Normal	NC	0	0	4	0.8	0.2
Mild outer ring	OF_1	4	0.5	5	0.8	0.2
Moderate outer ring	OF_2	8	4	6	0.8	0.2
Severe outer ring	OF_3	12	2	7	0.8	0.2