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There is such a question: When the shaft speed is 1450 r/min, the grease can fill ( ) of the bearing cavity. A) 1/3 B) 1/2 C) 2/3. As for the answer, some choose C while others choose B; please discuss this!
The initial amount of lubricant to be filled can generally be determined by the ratio of the allowable maximum speed n0 for bearing lubricants to the actual operating speed n of the bearing: when n0/n ≤ 1.25, it is recommended that the amount of lubricant fill occupy 1/3 of the free space inside the bearing； For 1.25＜n0/n≤5, it is recommended that the amount of grease filled occupy 1/3 to 2/3 of the free space inside the bearing ； When n0/n > 5, it is recommended that the amount of grease filled occupy more than 2/3 of the free space inside the bearing.