Selecting the right bearing for a specific application requires a review of performance requirements and material operating limitations. Certain design considerations must be met in the device and bearing to address such factors as load, speed, temperature, environment, method of lubrication and fit. Often times sacrifices must be made in one area to satisfy another to achieve optimal life.
Many factors come into play when selecting a bearing or creating a new design in which a ball bearing will be employed.
Most important are speed, load and temperature.
Load
Direction
Radial
Axial
Shock
Combined
Speed
Contstant Variable
Hi or Low
dN > 250,000
Temperature
Average
Max. Operating
Ambient
Environment
Vacuum
Gas or Air
Contaminants
Shaft / Housing
Fits
Geometry
Tolerances
Mounting
CN
C3
C4
Basic Static
Basic Dynamic
Equivalent Dynamic "P"
Determined by size and design.
Shaft and Housing Fits
ABEC Class
Basic Bearing Life
Ceramic Bearning Life
Example Part Number: CS6202XXPKWS - C | S | 6202 | XX | PK | WS
Ball Material: - C
C = Ceramic (Si3N4)
S = Stainless Steel (440C)
No symbol = Chrome Steel
Ring Material: - S
No symbol = Chrome steel
S = Stainless Steel (440C)
S3 = Stainless steel (SS304)
C = Ceramic (Si3N4)
CR = Ceramic (ZrO2)
N = Nylon
P = PEEK
Closure: - XX
Gas or Air
Contaminants
Retainer material: - PK
PK = PEEK
PS = PPS
VP1 = Vespel SP1
VP3 = Vespel SP3
TR = Torlon
PT = PTFE
NY = Nylon
PH = Phenolic
No symbol = Metal
Lubrication: - WS
Dry film lubrication / Coating
WS = Tungsten Disulfide
MO = Moly Disulfide
Grease
L1 = SRI, General purpose
L2 = Poly Rex EM, Electric Motor grade
L3 = Krytox, High Temperature
L4 = LVP Krytox, Vacuum
L5 = Kluber NB52, High speed