・Without requiring electric or air source, flange is lubricated with a infinitesimal quantity of oil that is discharged only when the crane is in operation.
With decreased friction resistance, it reduces flange wear and extend the wheel replacement interval (by 4-5 times for wheels or 2-3 times for rails).

・The oil feed can be automated in the crane maintenance operation.

・It may reduce abnormal noise.

・It facilitates inching motion of the crane to improve workability.

・It saves power consumption.

・With a body smaller than the RVF-type, it can be installed in a smaller space.