| ? | contact angle |
| ? | density of rolling-element |
| a | radius of neutral axis |
| D | pitch diameter |
| d | diameter of rolling-element |
| E | Young's modulus of elasticity |
| f s | shaft rotational frequency |
| f c | cage rotational frequency |
| f b | rolling-element frequency |
| f br | free resonance frequency of rolling-element |
| f bf | rolling-element defect frequency |
| f rr | resonance frequency of race |
| f ORDFL | outer race defect frequency (linear) |
| f IRDFL | inner race defect frequency (linear) |
| f IRWL | inner race waviness frequency (linear) |
| f IRWNL | inner race waviness frequency (non-linear) |
| f ORDFNL | outer race defect frequency (non-linear) |
| f RW | roller waviness frequency |
| f RRS | roller rough spot frequency |
| f ORDFL (L 1, L 2) | outer race defect frequency (linear) for n = 1 and n = 2 |
| f IRDFL (L 1, L 2) | inner race defect frequency (linear) for n = 1 and n = 2 |
| f IRWL (L 1, L 2) | inner race waviness frequency (linear) for n = 1 and n = 2 |
| f IRWNL (L 1, L 2) | inner race waviness frequency (non-linear) for n = 1 and n = 2 |
| f ORDFNL (L 1, L 2) | outer race defect frequency (non-linear) for n = 1 and n = 2 |
| f RRS (S 1, S 2) | roller rough spot frequency for n = 1 and n = 2 |
| f RW(W |
TABLE OF CONTENTS 
