11 Rolling Contact Bearings
Nomenclature
- A
- axial load, N
- C
- basic dynamic load rating, N
- C 0
- basic static load rating, N
- e
- factor
- F a
- external axial load, or thrust force, N
- F r
- external radial load, or radial force, N
- f p
- load factor
- f t
- temperature factor
- H
- total operating hours under variable loads, h
- L h
- bearing life in hours, h
- L 10
- rated life at reliability of 90%, rev
- L 10h
- rated life in hours at reliability of 90%, h
- L n
- bearing life at diffident reliability, h
- [L h ]
- allowable life in hours, h
- N i
- reaction force, N
- n
- rotational speed, rpm
- P
- equivalent dynamic load, N
- P 0
- equivalent static load, N
- P i
- resolved radial load component, N
- R
- radial load on bearing, N
- r 1
- radius of bore, mm
- r 2
- radius of rolling elements, mm
- r 3
- radius of outer ring, mm
- r 4
- radius of retainer, mm
- S
- induced thrust load, N
- S′
- appended thrust load, N
- S 0
- static safety factor
- S i
- resolved axial load component, N
- t
- temperature, °C
- X
- dynamic radial load factor
- X 0
- static radial load factor
- Y
- dynamic axial load factor
- Y 0
- static axial load factor
- α
- contact angle, deg.
- α 1
- life‐adjustment factor for reliability
- ε
- load‐life exponent
- θ
- angular deviation, deg.
- ω 1
- angular velocity of inner ring, rad s−1
- ω 2
- angular velocity ...
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