Hey @Schone henk ,
The tub bearing is under the washing machine's tub and it's what allows the tub to move and spin freely without any resistance. This bearing can wear out over time and when they do the banging noises will get louder and louder. They can also get damaged although this a decidedly more uncommon scenario so I would suggest having this examined by one of our engineers: https://www.samsung.com/uk/support/contact/
