31319
Description
The inner and outer ring raceways are tapered sections, and the rollers are tapered so that both the tapered surface of the raceway and the axis of the roller (if projected) will intersect at a common point on the bearing spindle. This geometry keeps the movement of the cone coaxial, with no sliding between the raceway and the outside diameter of the roller.
This conical geometry forms a linear contact surface that allows greater load carrying than a spherical (ball) bearing with point contact. The geometry means that the tangential velocity of each roller surface is the same as the entire length of its raceway along the contact surface, and no differential scrubbing occurs.
The rollers are stabilized and restrained by flanges on the inner ring, their large ends sliding against the flanges, thus preventing ejection due to the "pumpkin seed effect" of the conical shape.
The larger the half Angle of these cones, the more axial force the bearing can withstand.
Structure
Tapered roller bearing is a kind of separation type bearing. The structure of this bearing is mainly conical raceway in the inner and outer rings. It has three different structural types, which are: according to the number of rows of rollers, it is divided into single row tapered roller bearing, double row tapered roller bearing and four row tapered roller bearing.
Raw Material & Structure
| Part No. |
Components |
Raw Material |
Dimension/mm |
Rated Load/KN |
Weight |
| Cor |
Cr |
| 31319 |
Outer Ring |
Gcr15/G20CrNi2MoA |
95x200x49.5 |
314 |
355 |
6.31kg |
| Inner Ring |
Gcr15/G20CrNi2MoA |
| Roller |
Gcr15/G20CrNi2MoA |
| Cage |
Steel |
Advantages
1. Can withstand radial and axial composite load.
2. Under the premise of the same load capacity, the size of tapered roller bearings is smaller than that of ball bearings and cylindrical roller bearings.
3. It is beneficial to improve the rigidity of the bearing system and reduce the noise.
4. Bearing raceway internal pump oil lubrication effect.
5. The axial clearance is adjustable, the bearing life can be optimized.
6. The inner and outer rings can be separated, easy to assemble.
JATEC Internal control size chart
| items(Um) |
Outer ring |
Inner ring |
Rollers |
|
Datum end face flatness
Double-ended parallelism
|
≤0.003
≤0.003
|
≤0.002
≤0.003
|
≤0.001
≤0.001
|
| Datum end face roughness |
≤0.32 |
≤0.32 |
≤0.32 |
| Outer ovality/roundness |
≤0.003/≤0.003 |
≤0.003/≤0.002 |
≤0.002 |
| Raceway ovality/roundness |
≤0.003/≤0.003 |
≤0.003/≤0.002 |
|
| Inner hole ovality/taper |
≤0.003/≤0.003 |
≤0.003/≤0.002 |
|
| Raceway milling/super roughness |
≤0.32/0.08 |
≤0.32/0.032 |
≤0.025 |
| Size scattering |
≤0.01 |
≤0.01 |
≤0.002 |
| Tertiary/quadratic detection |
≤0.0001 |
≤0.0001 |
≤0.0001 |
| Full inspection of surface quality |
Eddy current flaw detection |
Eddy current flaw detection |
Eddy current flaw detection |
application scenarios
It is mainly used in engineering machinery, machine tool, automobile, metallurgy, mining, petroleum, machinery, electric power, railway and other industries
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