The city of Mainz, capital of the German state of Rhineland-Palatinate, has had a tramway network in operation since 1883. Today, the popular service is operated by Mainzer Mobilität (MM), the public transport operator for Mainz.
MM found that because of the lack of a suitable track lubrication method, trams were emitting noisy squeals in some sections. The company turned to SKF lubrication systems for a solution.
The SKF solution includes a single-line system in which approaching trams trigger a lubrication cycle. A pump sends lubricant to single-line distributors that supply each lubrication channel with 0.05 cubic centimeter (0.003 cubic inch) of lubricant. The small output volume offers a significant advantage in that it is better absorbed by the wheels and the track bed remains clean.