Nonsliding Roller Bearing

This is a roller bearing that can be printed in one piece.

**edit:** needs improvement; see below.

The special thing about it:
It has less sliding friction than a roller bearing *with* cage.
This is archived through the central rolls.
Those let the inner and outer rolls roll on rolls.
This bearing can can take radial and axial force.

It should run under (axial) load so that rolling is ensured !
A preload would work to but than a zero clearnce print with post assemb