Table 2.

Bearing and gear failure types description and Dataset partitioning.

Subject	Type	Description	Source domain		Target domain		Working conditions
			training	validation	training	validation
Bearing	Normal	Health state	640	160	50	150	20 Hz-0 V, 30 Hz-2 V
	Ball	Ball crack	640	160	50	150	20 Hz-0 V, 30 Hz-2 V
	Inner	Inner ring crack	640	160	50	150	20 Hz-0 V, 30 Hz-2 V
	Outer	Outer ring crack	640	160	50	150	20 Hz-0 V, 30 Hz-2 V
	Combination	Inner and outer ring crack	640	160	50	150	20 Hz-0 V, 30 Hz-2 V
Gear	Normal	Health state	640	160	50	150	20 Hz-0 V, 30 Hz-2 V
	Chipped	Teeth crack	640	160	50	150	20 Hz-0 V, 30 Hz-2 V
	Miss	Missing teeth	640	160	50	150	20 Hz-0 V, 30 Hz-2 V
	Root	Root crack	640	160	50	150	20 Hz-0 V, 30 Hz-2 V
	Surface	Surface wear	640	160	50	150	20 Hz-0 V, 30 Hz-2 V