Seal and roller bearing

A roller bearing seal comprising:

• the roller bearing seal having an internal face configured to be oriented toward an inside of a bearing and having an external face configured to be oriented toward an outside of the bearing;
• an insert part positioned along the internal face of the roller bearing seal, wherein the insert part comprises an annular-disc-shaped middle section having a radially inner deflection and a radially outer deflection, and wherein a first ratio (L2/L1) of an axial length (L2) of the radially outer deflection to an axial length (L1) of the radially inner deflection is less than zero point six five (0.65), the radially outer deflection having an outer deflection axial end located distal from the annular-disk-shaped middle section, the radially inner deflection having an inner deflection axial end located distal from the annular-disk-shaped middle section;
• a polymer part configured to form sealing contact with an inner ring and an outer ring of the bearing, the polymer part being connected to the insert part such that the entire external face is formed by the polymer part, the polymer part proximate the radially outer deflection not extending axially past the outer deflection axial end of the radially outer deflection;
• and
• a seal lip formed by the polymer part, the seal lip being formed radially below the radially inner deflection and the seal lip being oriented in a direction opposite to the radially inner deflection, the seal lip not being axially overlapped by the radially inner deflection, the seal lip being the only contact between the polymer part proximate to the radially inner deflection and the bearing.