1. Lecture 6 – Bearings and Bushings
EML 2023 – Motor Control
Lecture 6 – Bearings and Bushings

2. Basic Rule The motor’s job is to turn the shaft.
The motor does not help to hold the shaft in place.
Consider the example of a vertical shaft.

3. provide radial support at two locations
provide axial (vertical) support

4. Bearings and Bushings

5. Ball Bearings angular contact ball bearing radial ball bearing
thrust ball bearing

6. Roller Bearings

7. Self-Aligning Bearings

8. Bushings
with flange
no flange

9. Quick Comparison Bearings Bushings can carry higher loads
lower friction
inexpensive
EML 3005 will teach you how to select a bearing based on:
radial and axial loading
speed of revolution
desired life