Brakes for main drive in Tractor.

In the case of a wet-running application however, the grooving of the friction surface is critical for directing the cooling oil accurately. Many different surface patterns are available, especially in the case of sintered plates, for a variety of applications. These include, for example, spiral grooves, radial grooves or a combination of the two, honeycomb and sunburst patterns, and various other different forms of oil channels. Paper linings are also used.