This standard specifies the boundary dimensions of four row tapered roller bearings.
This standard is applicable to four row tapered roller bearings and is used for the bearing manufacturer's design and the customer's type selection.
2 Symbols (See Figure 1)
For the purpose of this standard, the following symbols apply.
Unless otherwise stated, all the symbols shown in figures and the values shown in tables denote the nominal dimensions.
B: Total width of bearing inner ring
B1: Width of inner ring with double raceways
b: Width of outer ring spacer
C: Total width of bearing outer ring
D: Bearing outside diameter
d: Bearing bore diameter
r1: Front face chamfer dimension of inner ring
r1smin: Smallest single front face chamfer dimension of inner ring
r2: Back face chamfer dimension of outer ring
r2smin: Smallest single back face chamfer dimension of outer ring
