I designed this HEVO motor mount to remove the load on the Z-motor axis. With my mount the weight of the heating bed lies on the F6-14M ball bearing instead on the motor axis.
You need an "F6-14M - M6x14x5" bearing that should fit exactly in the bracket. After tighten the motor well and inserting the bearing you have to press down the coupler to the bearing and fix it tight.
Note: The four holes beneath the bearing can be used to remove it from the bracket.
Das Filament PETG