short description.
Hanking Rolling Bearing including: Tapered roller bearing, Cylindrical roller bearing, Spherical roller bearing. Bearing dimensions are from 200mm to 1.4 meters, accuracy can reach to P2/P4.
Wholly-owned Hanking roller production base- Cylindrical roller, Tapered roller. The product dimensions are from 20mm to 200mm.
For Hanking Taper Roller Bearing, according to the actual size requirements, we can provide imperial or metric dimension. In addition, we can optimize the design on the structure according to actual needs. For example: the structure of cage is changed to pin type; the end face of ring is evenly distributed with annular oil groove; the bore is with spiral groove, etc.
Hanking Bearing aims to produce high life, high reliability roller bearing, suitable for different applications.
The inner and outer rings of tapered roller bearings have tapered raceways, and tapered rollers are arranged between raceways. If conical surface extends, it will eventually reach to an apex point on the bearing axis. This kind of bearing is mainly used to bear radial load mainly and also axial load. The bearing axial load capacity is determined by the contact angle α and the angle of outer raceway.
The larger the α angle is, the larger the axial load capacity. The tapered roller bearing is a separable bearing. The inner ring with roller and cage forms inner assembly and can be installed separately from the outer ring. This kind of bearing can be divided into single row, double row and four row tapered roller bearings according to the number of rows of rollers.
The roller / raceway contact surface of provides the best stress distribution. The special structure of the guided rib and sliding surface of the big end of roller is quite helpful for formation of the lubrication film on the contact surface of the roller end face / the rib. The benefits include increased running reliability and reduced misalignment sensitivity.
According to the actual size requirements, we can provide imperial or metric dimension. In addition, we can optimize the design on the structure according to actual needs. For example: the structure of cage is changed to pin type; the end face of ring is evenly distributed with annular oil groove; the bore is with spiral groove, etc.
This bearing can take radial load and one direction axial load. Axial component force will come when bearing take radial load, so we often need another bearing to balance this situation. The capacity to take axial load decided by αangle, the larger α, the bigger axial load capacity. When radial load imposed to single row TRB, internal axial load will come into being while the load transferred from one raceway to another raceway. This must be taken into account when calculating the equivalent load for a bearing configuration consisting of two single bearings or a paired bearing. The standard single row tapered roller bearing allows angular deviation of inner ring against outer ring is limited to a few arc minute. A bearing with a modified contact between roller and raceway allows inclination about 2 'to 4'. The internal clearance of single row tapered roller bearing can only be obtained after installation, which is determined by the adjustment of one bearing to another bearing in the opposite direction.
Dimension
Metric bearing: single row TRB follows GB/T273.1-2003/ISO 355-1977
Imperial bearing: dimension follows AFBMA 19-1974（ANSIB3.19-1975）
Clearance
The internal clearance of single row tapered roller bearing can only be obtained after installation, which is determined by the adjustment of one bearing to another bearing in the opposite direction.
Permitted misalignment
The standard single row tapered roller bearing allows angular deviation of inner ring against outer ring is limited to a few arc minute. A bearing with a modified contact between roller and raceway allows inclination about 2 'to 4'.
Minimum load
In order to ensure normal rotation, they must always take certain minimum load, especially run at high speed or great acceleration or rapid change load direction. In these cases, the inertia force between roller and cage plus the friction from lubricant may play a harmful role in the rolling of bearing configuration, and may cause destructive sliding between the roller and the raceway.
The necessary minimum radial load for standard tapered roller bearings can be estimated according to the following formula.
Frm = 0,02 C
Frm = minimum radial load，kN
C = rated static load，kN（see bearing specification）
A higher minimum load may be required at low temperature start-up or when the lubricant viscosity is high. The weight of the component supported by the bearing, plus the external force, generally exceeds the necessary minimum load. If this is not the case, the single row tapered roller bearing must bear additional radial load, which can be obtained by applying preload.
Equivalent dynamic load
For tapered roller bearing takes dynamic load
When Fa/Fr ≤ e 时， P = Fr
When Fa/Fr > e 时， P = 0,4 Fr + YFa
Coefficient e and Y can be found from bearing specification.
Equivalent static load
For taper bearing takes static load,
P0 = 0,5Fr + Y0Fa
When P0 < Fr，should use P0 = Fr。Coefficient Y0 can be found from bearing specification.
Confirm axial load
When a radial load is applied to a single row tapered roller bearing, the load is transmitted from one raceway to another, forming an angle with the bearing axis, resulting in internal axial force in the bearing. This must be taken into account when calculating the equivalent bearing load for paired bearing configuration consisting of two single bearings and / or a series configuration.
Paired single tapered roller bearing
In a bearing configuration in which the load capacity of a single tapered roller bearing is not enough or the shaft must have certain positive or negative axial clearance in both directions for axial positioning, the bearings listed in the section of "single row tapered roller bearings" can be supplied as matched bearing pairs, and the configuration methods are as follows:
1. Face to face
In the face-to-face paired bearing alignment, a spacer is placed between two outer rings, so manufacturing is relatively easy. In face-to-face configuration, the load line converges on the axis of the bearing. The axial load acting on two directions can be borne by one bearing in each direction.
2. Back to back
In the back-to-back configuration, a spacer is placed between the two inner rings and between the two outer rings. The manufacturing process for this configuration is more complex than that required for face-to-face bearing sets. In the back-to-back configuration, the load line is separated from the axis of the bearing, so the rigidity provided is relatively large, and it can also bear the tilting moment. The axial load acting on two directions can be borne by one bearing in each direction.
Double row tapered roller bearing can bear heavy complex load (radial and axial) and has good rigidity. It can be fixed axially in both directions, with certain axial clearance or preload. They are mainly used in gearboxes, hoist and crane, rolling mills and mining machinery, such as tunnel boring machines.
TDO type:
this kind of bearing has a double raceway outer ring and two inner rings, and a spacer between two inner rings. The bearing clearance can be adjusted by changing the thickness of the spacer. Because the axial clearance or preload has been adjusted during manufacturing, they are quick assembly components. These bearings are back-to-back configuration, so the load line is separated from the bearing axis. Because of this, the bearings can be used in a more rigid configuration, allowing for considerable tilting moments. This kind of bearing can bear both radial load and bidirectional axial load, and limit the bidirectional axial displacement of shaft or housing within the range of axial clearance of bearing. (As shown below)
TDI type:
the bearing of this structure has a double raceway inner ring and two outer rings with two rows of rollers and cage assembly. Double row rollers are arranged face to face. Usually a spacer is arranged between two outer rings. Select the size of the spacer to get a certain axial clearance or preload. (As shown below)
Four row tapered roller bearings are widely used in medium and low speed rolling mills. This kind of bearing has compact structure and can bear large radial and axial shock load in a limited space. Generally speaking, no additional thrust bearing is required in the bearing configuration. This means that the shaft neck diameter of the roll can be relatively short and housing on both sides of the roll can be the same. In order to be able to change the roll quickly, this kind of bearing must have clearance fit on the roll journal. The disadvantage of clearance fit is that the inner ring slides on its base under load, which usually causes the wear of the base with lower hardness than the bearing ring. In order to reduce the influence of clearance fit, that is to reduce wear, the bearing has a spiral groove in the inner ring bore or an oil groove on the side of the inner ring. These grooves deliver lubricant to the contact surfaces of the inner race and the base.
TQO type:
This kind of bearing adopts two double raceway inner rings, one double raceway outer ring and two single raceway outer rings. There are spacers between the inner ring and the outer ring for adjusting the clearance. Their performance is basically the same as that of double row bearings, which can bear large radial load, but the limit speed is low. It is mainly used in heavy machinery, such as rolling mill etc. with stamped steel cage. In general, outsize bearings with an outer diameter bigger than 650mm or in special design, adopts welded pin cage . (as shown below)
TQI type:
It consists of two double raceway outer rings, one double raceway inner ring, two single raceway inner rings and one outer ring spacer. Inner ring with roller and cage assembly. It is mainly used in heavy machinery, such as rolling mill etc. with stamped steel cage. In general, outsized bearings with an outer diameter greater than 650mm or in special design, welded pin cage are used. (as shown below)
Sealed four row tapered roller bearing
Add seals on the basis of TQO structure to effectively prevent solid contamination, water or coolant from entering the bearing, also prevent the loss of lubricating grease and reduce the pollution of lubricating grease to the coolant. The bearing can be equipped with O-ring on the outer diameter, rubber seal with steel frame on both sides, and rubber seal between two inner rings. (as shown below)
You can send a direct message to Shenyang Hanking Precision Bearing Co., Ltd.
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