This is the most basic and most widely used type of tapered roller bearing. It consists of two main separable parts: the cone (inner ring) assembly and the cup (outer ring). It is typically mounted in opposing pairs on a shaft.
C90 - Dynamic Radial Rating (90 million revolutions)4
N/A3470 lbf15400 N
C1 - Dynamic Radial Rating (1 million revolutions)5
N/A13400 lbf59500 N
C0 - Static Radial Rating
N/A20000 lbf88700 N
Ca90 - Dynamic Thrust Rating (90 million revolutions)6
N/A1960 lbf8730 N
Factors
K - Factor7
N/A1.77
e - ISO Factor8
N/A0.33
Y - ISO Factor9
N/A1.81
G1 - Heat Generation Factor (Roller-Raceway)
N/A73.4
G2 - Heat Generation Factor (Rib-Roller End)
N/A74.1
Cg - Geometry Factor10
N/A0.0996
1 These maximum fillet radii will be cleared by the bearing corners.
2 These maximum fillet radii will be cleared by the bearing corners.
3 Negative value indicates effective center inside cone backface.
4 Based on 90 x 106 revolutions L10 life, for The Timken Company life calculation method. C90 and Ca90 are radial and thrust values.
5 Based on 1 x 106 revolutions L10 life, for the ISO life calculation method.
6 Based on 90 x 106 revolutions L10 life, for The Timken Company life calculation method. C90 and Ca90 are radial and thrust values for a single-row, C90(2) is the two-row radial value.
7 These factors apply for both inch and metric calculations. Consult your Timken representative for instruction on use.
8 These factors apply for both inch and metric calculations. Consult your Timken representative for instruction on use.
9 These factors apply for both inch and metric calculations. Consult your Timken representative for instruction on use.
10 Geometry constant for Lubrication Life Adjustment Factor a3l.
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Like most things, choosing a tapered roller bearing also has disadvantages. When misalignment occurs, the results can cause irreversible damage. If you know the cause for misalignment is high, choosing a different option, such as spherical roller bearings, would be a good idea.
Single row tapered roller bearings must be used either with a second bearing (fig. 1) or as a matched pair (Matched tapered roller bearings). The bearings must be adjusted against each other until the requisite clearance or preload is obtained (Selecting preload).
Tapered roller bearings have high load capacities.These capacities far exceed ball bearing limitations and rival similar spherical roller bearing capacities.
Common bearing failure modes during service mainly include contact fatigue, wear, fretting corrosion, overheating, etc., which usually occur on the surface of raceway and rollers [1], [2], [3].
Wheel bearings have an average lifespan of 136,000 to 160,000 km (approximately 85,000 to 100,000 miles). This is only a rule of thumb though, the actual lifespan of a wheel bearing depends on the quality of the wheel bearing and the operating conditions.
The majority of bearing failures occur because of improper lubrication. Lubrication failure can occur if the wrong lubricant is used, if not enough lubricant is applied, or if the bearing has been exposed to excessive temperatures that have caused the lubricant to degrade. Corrosion & Contamination.
Place the bearing cone assembly, small end down, into the grease packer funnel. Plug the bore of the large end of the bearing cone assembly with the conical retainer. Firmly press down on the conical retainer. This enables the grease to be forced between the rollers, cage and cone.
Class 00 (ABMA), Class A (ISO) and Class P2 (DIN) bearings are precision grade tapered roller bearings designed for higher speed and accuracy applications than standard class bearings.
In many applications tapered roller bearings are used in back-to-back pairs so that axial forces can be supported equally in either direction. Tapered roller bearings are widely used in automotive vehicle wheel bearings handling radial and axial loads.
The top 10 bearing manufacturers in the world in 2023 are SKF-Sweden, fa*g-Germany, TIMKEN-USA, NSK Japan, NTN Japan, NACHI Japan, KOYO Japan, NMB Japan, IKO Japan, which together account for approximately 75% of the world's used harvest market. , of which Chinese enterprises account for approximately 20.3% and other ...
Deformations: Roller bearing deformations can occur in several different ways. Excess heat can cause metal flow, which can result in rib face deformations in the bearing cones. Deformation can cause rollers to skew and the bearing to lock up entirely. Fatigue spalling: This is a type of damage to the metal surface.
In 1895, Timken came up with an improvement that would reduce friction and improve the reliability and longevity of their carriages' axles. Three years later, he patented the tapered roller bearing. In 1899, Timken established The Timken Roller Bearing Axle Company in a corner of his factory.
These bearings are typically used in heavy-duty industrial applications such as construction equipment, mining equipment, and paper mills. These bearings must be properly lubricated to ensure smooth operation and long life.
Tapered roller bearings are capable of carrying both radial and axial loads but largely used for applications where axial load component predominates. They are often used in pairs to take the thrust load in both directions.
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