Roll seat bearing such as rudder roll seat bearing for rowing boat, has running wheels which contact coating layer of respective running rails, where coating layer is made of material having higher hardness

摘要

The roll seat bearing (1) has a roll seat (2) arranged on the running wheels (3,4) which are arranged on two running rails (5,6). Each running wheel is made to contact coating layer (17) of running rail. The coating layer is made of material having higher hardness than that of material of the running rail. The running wheel is made of metal or ceramic.