Ball Transfer ???
ISB Ball Transfer (Ball Bearing) divided into two categories; Ball up and Ball down.
“Ball up” Ball Transfer (Ball Bearing) consists of a large ball that sits upon small balls encapsulated in a hemispherical cup. Small balls roll smoothly in clearance upper area of hemispherical cup enables large ball to roll smoothly upon small balls.
Example usage of ball transfers .
As shown in below pictures, ball transfers (Ball Bearing) are used in rotating and changing the direction in conveyor lines. Also as a castor or guide in conveyor lines and so many other applications.