A: Seals and shieldsare both in place to keep contaminants out of a bearing. In order ofeffectiveness, the enclosures that are offered are as follows: metal shields,rubber non-contact seals, Teflon non-contact seals, and rubber contact seals.Not surprisingly, as the sealing performance is increased, the torque requiredto turn the bearing will also increase due to the increased friction caused bythe seal/shield. The application's condition and life requirements areimportant to know to determine the best shield or seal choice.

Consult with one of SUNBERING'ssales or engineering personnel to help determine what is best for yourparticular application.