The grease life of a grease-sealed ball bearing with a FYH housing can be obtained from the formula (4.7) on page 28. However, the grease replenishment interval of the rolling bearing with a house takes into account the specificity of the oil supply method and the safety of the bearing with a house. It is recommended to use 1/4 to 1/3 of the grease life obtained by the above calculation formula. In addition, when using under severe environmental conditions such as dust and moisture, the refill interval of grease should be further shortened in consideration of its influence. When the operating conditions of the rolling bearing with a block are not clear and the general operating conditions are not specified, the grease replenishment interval in Table 14.4 is used as a rough guideline. FYH rolling bearing with seat is filled with high-quality grease and sealed with high-performance oil seal. Therefore, the grease has a long life under normal operating conditions and can be used without oil supply. However, when used in applications with high operating temperatures and a lot of dust and water, early grease deterioration may occur, and lubrication failure may occur in a short period of time. FYH Rolling Bearings with Houses are oil-feeding type, so when used in applications where the grease deteriorates rapidly, the grease must be replenished regularly. FYH rolling bearing with seat can obtain a longer life by adding new grease to maintain a normal lubrication state. Grease replenishment amount: The initial grease filling amount of FYH rolling bearing with block is about 30 to 35% of the internal space volume of the bearing. If the amount of grease in the bearing is too large, the stirring resistance of the grease increases, which may cause abnormal heat generation and leakage of grease. The replenishment amount of grease should not exceed the initial filling amount. Table 14.5 shows the recommended values u200bu200bfor the amount of grease replenished for FYH rolling bearing units. In addition, in order to improve the dustproof performance of the bearing when it is used at low speed, it is necessary to supplement the grease twice as much as this table. Remarks) 1. The supplementary amount for UK type bearings is also used in this table. 2. The recommended replenishment amount of the triple seal assembly is 1.5 times the value in this table. 3. This table shows the value for standard grease (specific gravity 0.9g/ml). For greases with different specific gravities, the values u200bu200bconverted to the same volume are used. Grease replenishment interval (recommended) Note 1) The grease replenishment interval shown in ( ) is for cold resistance (D2K2). Remark) The grease replenishment interval in this table is for 8 to 10 hours of operation per day. When the operating time is different, obtain it proportionally from this table.