A friction locked connection between a metallic outer ring and an inner ring made of non-sticking material; through radial bracing, the connection ensures good torque transmission. The rings are manufactured with an interference (the difference of the joint diameter at room temperature) to enable them to be joined in a shrink connection (after heating the outer ring and/or cooling the inner ring). The interference has to be designed to ensure reaching the minimum joint compression required in operation, without exceeding the permissible material parameters, while taking due account of the tolerances, the interference loss (lowering of surface peaks) and unequal thermal expansion due to unequal coefficients of expansion. Metallic reinforcing rings have proven successful in shrink assemblies with carbon as inner ring for mechanical seals in the maximum pressure range.

They increase joint compression and geometrical stability, and they produce better stress patterns. Additional sealing agent is applied if necessary to prevent leakage via the shrink fit.

Shrink assembly with support ring