Sliding bearings can also be lubricated with grease. The following points should be considered when selecting grease:
1) When the bearing load is large and the speed is low, the grease with a small penetration degree should be selected, and vice versa. High-speed bearings use grease with a small degree of penetration and good mechanical stability. Special attention is paid to the lower viscosity of the base oil of the grease.
2) The dropping point of the selected grease is generally higher than the working temperature of 20-30 ° C. In the case of continuous operation at high temperature, be careful not to exceed the allowable operating temperature range of the grease.
3) When the sliding bearing works in water or humid environment, it should choose calcium-based, aluminum-based or lithium-based grease with good water resistance.
4) Select a grease with good adhesion.
Lubrication cycle of grease for sliding bearings:
Accidental work, unimportant parts: shaft speed <200r/min, lubrication cycle 5 days; shaft speed >200r/min, lubrication cycle 3 days.
Intermittent operation: shaft speed <200r/min, lubrication cycle once every 2 days; shaft speed>200r/min, lubrication cycle once every day.
Continuous operation, working temperature is less than 40 °C: shaft speed <200r/min, lubrication cycle once every day; shaft speed>200r/min, lubrication cycle once per shift.
Continuous operation, working temperature 40-100 °C: shaft speed <200r/min, lubrication cycle once per shift; shaft speed >200r/min, lubrication cycle twice per shift.
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