Bearings-Reducing Failure Rate
Course 1 – Failure Analysis
Prerequisites: This lesson is designed for participants familiar with safe shop practices and the use of hand tools and precision measuring instruments.
Description: This lesson explains the purpose of bearings and demonstrates how bearings reduce friction and maintain the alignment of operating equipment. The basic operation of anti-friction bearings and plain journal bearings is demonstrated as well as the importance of full fluid film lubrication and proper lubrication clearance. Additionally, indications of various premature bearing failures are discussed.
- Understand how bearings reduce friction
- Describe radial, axial (thrust), and angular load in terms of the pressure applied to the shaft and bearing
- Understand the operation of common types of plain bearings and their applications
- Understand the operation of common types of anti-friction bearings and their applications
- Understand the purpose of seals and shields and the conditions when each is used
- Relate the “interference fit” to bearing operation
- Recognize common indications of bearing failure
- Identify common types of premature bearing failure and some of the means used to prevent them
Course 2 – Maintaining Bearings
Prerequisites: This lesson is designed for participants familiar with safe shop practices, the use of hand tools and precision measuring devices, as well as bearings failure analysis.
Description: This lesson explains and demonstrates how to clean and disassemble bearing housings and how to dismount, inspect, and mount common types of bearings. The importance of cleanliness and following manufacturers’ instructions are stressed throughout each demonstrated procedure.
- Dismount anti-friction bearings using a bearing press and/or a bearing puller
- Inspect the bearing for signs of failure
- Clean the shaft and check for taper and out-of-round using the proper measuring instruments
- Clean the housing and check for damage
- Select the proper bearing for replacement, if necessary
- Properly orient a bearing prior to installation
- Mount a bearing using an induction heater and/or an arbor press
- Measure the bearing’s inner and outer clearances during installation
- Properly lubricate bearings per manufacturers’ recommendations