FAQ
- What is the purpose of bearing lubrication?
- Is grease or oil better in my application?
- What causes bearing noise?
- What factors increase or decrease bearing torque?
1. What is the purpose of bearing lubrication?
- Extends fatigue life of the bearing by reducing wear and friction between the mating components of the bearing assembly.
- Prevents corrosion and extends shelf life.
- Provides a level of protection from foreign material entering the rolling elements.
- Reduces the noise level of the bearing, lowers torque, and assists the bearing in reaching maximum operating speed.
2. Is grease or oil better in my application?
Grease consists of a base oil in a thickening agent. The thickening agent extends operational and shelf life by slowing the migration and evaporation of the oil. Grease is recommended for lower speeds and less torque sensitive applications. Oil is recommended where low torque or high rotational speeds are a consideration. Many popular oils are generally the same as those used as base oils in greases. PACAMOR KUBAR BEARINGS offers a wide range of oils and greases for a variety of applications. Please contact a PKB engineer for technical assistance with any special requirements.
3. What causes bearing noise?
Bearing noise is a function of both the bearing and the way it is used. Bearing noise is not generally influenced by ABEC and there is no fixed standard among bearing manufacturers for acoustic noise. Some external factors which affect bearing noise include, lubricant type, excessive bearing load, and improper installation.
4. What factors increase or decrease bearing torque?
Factors that increase bearing torque include:
Increased number of balls in the bearing Tight crimp ribbon retainer Tight radial play High lubricant viscosity High lube fill in the bearing High applied bearing load
Factors that decrease bearing torque include:
- Fewer balls in the bearing
- Crown type or loose crimp retainer
- Loose radial play
- Low lubricant viscosity
- Low lube fill in the bearing
- Low applied bearing load
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