The most basic bearing terms, robots should understand!

　 Symbol
Use this catalog of the main symbols according to the standard of ISO. Common bearing dimensions are shown in Figure 1 and figure 2. Others are as follows.
All symbols may be used in conjunction with a subscript to indicate technical requirements.
A = rotational speed coefficient [mm/min]
N = DM
C = bearing rating [kN]
DM = bearing average diameter [mm]
= 0.5 (D + D)
F = actual bearing load [kN]
L = service life, usually expressed in million revolutions or hours of work
N = speed [r/min]
P = bearing equivalent load [kN]
Pu = fatigue load limit [kN]
ETA = C pollution coefficient
Viscosity ratio: the actual viscosity and the desired viscosity
V = oil viscosity [mm2 /s]
Shaft system (Figure 3)
Cylindrical roller bearing
Four point contact ball bearing
Seat
axis
Shaft shoulder
Shaft diameter
The shaft seat
End plate
Radial shaft seal
Distance ring
Bearing bore
Bearing seat
Bearing seat cover
Stop ring
Radial bearing (Figure 4 and figure 5)
The inner ring
The outer ring
Roller: ball, cylindrical roller, needle roller, tapered roller, spherical roller, ring roller
Retainer
Covering device
Seals - rubber manufacturing
Dust cover - made of steel plate
Outer surface of outer ring
Inner hole
Inner shoulder surface
Outer ring shoulder surface
Stop slot
Stop ring
Outer side
Seal groove
Outer Ring Raceway
Inner ring raceway
Seal groove
Inner end
Chamfer
Bearing pitch diameter
Total bearing width
Leading edge
Locating flange
contact angle
Thrust bearing (Figure 6)
The shaft ring
Roller and cage assembly
Seat
Spherical self-aligning seat
aligning seat washer