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Combine 2 of these bearing shells to clamp a hexagonal bearing .
You can mount it either on the front or on the sides of the profile.
In combination with these items and a few screws, you can easily build a drive which is completely invisible in the core of the profile:
Engines
Motor clutch
Hex motor axis
You can find suitable wheels here and https://www.motedis. com/shop/::9428.html# here
