Tapered roller bearings are designed so that the imagined conical apices formed by the raceways of the inner and outer rings and the rollers all converge at one point on the bearing axis. The trapezoidal tapered rollers used as the rolling elements are guided by a large rib on the inner ring.
Dimension series
| ISO |
3DC |
|
ISO355 dimension series approx. |
Boundary Dimensions
| d |
35 |
mm |
Bore diameter |
| D |
72 |
mm |
Outside diameter |
| T |
24.25 |
mm |
Total width |
| B |
23 |
mm |
Width of inner ring |
| C |
19 |
mm |
Width of outer ring |
| Cup r (min.) |
1.5 |
mm |
Chamfer dimension of outer ring (Cup) |
| Cone r (min.) |
1.5 |
mm |
Chamfer dimension of inner ring (Cone) |
Basic Load Ratings
| Cr
|
86500 |
N |
Basic dynamic load rating |
| C0r
|
83500 |
N |
Basic static load rating |
Speeds
| Grease |
5300 |
min-1
|
Grease lubrication |
| Oil (Oil-bath) |
7100 |
min-1
|
Oil-bath lubrication |
Dimensions
| a |
17.9 |
mm |
Effective load center |
Abutment and Fillet Dimensions
| da (min.) |
46 |
mm |
Diameter of shaft abutment |
| Db (min.) |
67.5 |
mm |
Diameter of housing abutment |
| Da (min.) |
61 |
mm |
Diameter of housing abutment |
| Da (max.) |
63 |
mm |
Diameter of housing abutment |
| Sa |
3 |
mm |
Minimum width of space required in housing on large side face |
| Sb |
5 |
mm |
Minimum width of space required in housing on small side face |
| db (max.) |
42 |
mm |
Diameter of shaft abutment |
| ra (max.) |
1.5 |
mm |
Radius of shaft or housing fillet of inner ring |
| ra (max.) |
1.5 |
mm |
Radius of shaft or housing fillet of outer ring |
Calculation factors
| e |
0.38 |
|
Constant |
| Y0 |
0.88 |
|
Axial load Factors |
| Y1 |
1.6 |
|
Axial load Factors |
Mass
