Why is the grinder working noisy? Repair of MSHU-1,2-150

Angle grinding machine МШУ-1,2-150
Idle spindle speed 3000-6800 rpm.
Rated Power Consumption 1200 W
Type of electric motor single-phase, collector
Nominal operating mode (15 min.-work, 5 min.-pause)
Car class 2
Nominal diameter of a circle is 150 mm
5 years service life
Does the machine stop during operation or is it noisy? Likely cause: breakage of gear teeth or failure of bearings; in any case, it is necessary to replace gears or bearings.
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[@enderman98]

Хорошая марка диод , у меня лет 10 ходила, буду менять подшипник малый.

[@seryozha8852]

Со смаской акуратней много нелзя ложить, грецца будет.

[@enderman98]

Пиши номера подшипников.на будущее.спасибо.

[@Cheredser]

5:35 причина поломки - подшипник

[@krivski2554]

Круто

[@enderman98]

Номер подшипника 607z?