FIELD: test technology. SUBSTANCE: device has a broadband sensor coupled with broadband high-pass filter for discriminating signal components caused by all the flaws of a bearing being tested in the range of 20-300 kHz, an integrating analogue-digital converter where discriminated signals are added for a time period no less than a period of one revolution of the bearing, digital indicator receiving signals from the converter. A state of the bearing is estimated by comparing an actual level of acoustic noise with a permissible one for a given type of bearing. EFFECT: enhanced reliability. 1 dwg
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