1, individual bearing point, must use hand often refuels, if change uses the fat not only saves the matter and can avoid the accident because of the lack of oil;
2, the fat itself has a sealing effect, which allows the adoption of a less sealed mechanism to achieve the purpose of simplifying the design.
3, experience has proved that in certain speed range (n<20000r/min or dn<20000mm.r/min) with lithium base grease than drop.