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Why is my Dremel is making loud squealing noises when in use?

Why is my Dremel is making loud squealing noises when in use?

When I use my Dremel it makes loud squealing noises, the faster it spins the louder it gets.

Asked by: Guest | Views: 116
Total answers/comments: 2
bert [Entry]

The issue might be either the bearing are worn out or the brushes need replacement. Dremel advises changing the brushes every 60 hours of use. More information can be found at Dremel 4000 Troubleshooting.
bert [Entry]

"Hi

You need to change the carbon brush to fix this issue."