Taper bearing refers to the radial thrust type rolling bearing whose rolling body is tapered roller. There are small taper angle and large taper angle two kinds. Small tapered angle mainly bear radial load mainly radial and axial combined load, often into double use, reverse installation, inside and outside the seat ring can be installed separately, in the installation and use of radial and axial clearance can be adjusted;.
Large taper angle mainly bear axial load mainly axial and radial combined load, generally not used to bear pure axial load alone, when the pair configuration (end relative installation) can be used to bear pure radial load.
Tapered roller bearings belong to the separation type bearings, bearing the inner and outer ring have tapered raceway. The bearings are divided into single, double and four rows of taper bearing and other different structure types according to the number of rollers installed. Tapered roller bearings are mainly used to bear radial load mainly radial and axial combined load, and angular contact ball bearings compared to the bearing capacity, the limit speed is low.
SKF tapered roller bearings have tapered inner ring and outer ring raceway, tapered roller arrangement in between. SKF’s tapered roller bearings are particularly suitable for bearing combined (radial and axial) loads. The load carrying capacity of a tapered roller bearing depends on the raceway angle of the outer ring, the greater the angle the greater the load carrying capacity. The axial load capacity of the bearing is mostly determined by the contact angle α; the larger the α angle, the higher the axial load capacity. The angle size is expressed by the calculation coefficient e; the larger the value of e, the larger the contact angle, the greater the suitability of the bearing to bear axial load.
Single row tapered roller bearings can bear radial load and single direction axial load. When bearing radial load, will produce an axial force, so when another can bear the opposite direction of the axial force bearing to be balanced. taper bearing can withstand a direction of the axial load, can limit the shaft or shell a direction of axial displacement.
Tapered roller bearings are usually separated type, that is, by the inner ring with roller and cage assembly consisting of tapered inner ring assembly can be installed separately with the tapered outer ring (outer ring). taper bearings are widely used in automobile, rolling mill, mining, metallurgy, plastic machinery and other industries.
The angle of the outer ring and the outer raceway diameter size has been standardized with the same external dimensions. Not allowed to change in the design and manufacture, so that the outer ring of tapered roller bearings and inner components can be commonly interchangeable in the world.
Single row tapered roller bearing clearance needs to be adjusted by the user at the time of installation; double row and four row tapered roller bearing clearance has been given according to the user’s requirements when the product is shipped, no need for user adjustment.
Tapered roller bearing types: single row tapered roller bearings, double row tapered roller bearings, four row tapered roller bearings, multi-seal double, four row tapered roller bearings
Single row tapered roller bearings.
Single row tapered roller bearings have an outer ring, its inner ring and a set of tapered rollers by the basket-shaped keep frame wrapped into an inner ring assembly. The outer ring can be separated from the inner ring assembly, in accordance with the ISO tapered roller bearing size standards, any a standard model of tapered roller bearing outer ring or inner ring assembly should be able to and the same model outer ring or inner ring assembly to achieve international interchangeability. That is, the same type of outer ring in addition to the external dimensions, tolerances need to comply with ISO492 (GB307), the inner ring components of the cone angle, components such as cone diameter must also comply with the relevant provisions of the interchange.
Usually, single tapered roller bearing outer ring raceway taper angle in 10 ° ~ 19 °, can simultaneously withstand the combined effect of axial load and radial load. The larger the cone angle, the greater the ability to withstand axial load. Large tapered angle bearing, rear code plus B, taper angle between 25 ° ~ 29 °, it can withstand the larger axial load. In addition, single row taper bearing can be installed in the process of adjusting the size of the clearance.
Double row tapered roller bearings.
The outer ring (or inner ring) of double row tapered roller bearing is a whole. Two inner ring (or outer ring) small end face is close to the middle of the spacer, clearance is to rely on the thickness of the spacer to adjust, also available spacer thickness to adjust the double row tapered roller bearing preload.
Four-row tapered roller bearings
Four-row taper bearing, the performance of such bearings and double-row tapered roller bearings are basically the same, but than double-row tapered roller bearings to bear the radial load is greater, the limit speed is slightly lower, mainly for heavy machinery.
Multi-sealed double, four-row tapered roller bearings
Multi-sealed double and four row tapered roller bearings, ZWZ provides long life, multi-sealed double and four row tapered roller bearings. Personalized new design of bearings, change the traditional design method of fully sealed bearings, using a new type of seal structure type that combines sealing and dustproof, improve the sealing effect and improve the sealing performance. Multi-seal double, four-row tapered roller bearings compared with open structure bearings, life increased by 20% to 40%; lubricant consumption reduced by 80%.
Size range
Size table of ZWZ tapered roller bearings
Single row tapered roller bearings.
Inner diameter size range：20mm～1270mm
Outer diameter size range: 40mm～1465mm
Width size range: 15mm～240mm
Double row tapered roller bearings
Inner diameter size range：38mm～1560mm
Outer diameter size range：70mm～1800mm
Width size range： 50mm～460mm
Four-row tapered roller bearings
Inner diameter size range：130mm～1600mm
Outer diameter size range：200mm～2000mm
Width size range： 150mm～1150mm
Tolerance
ZWZ metric tapered roller bearings have general grade tolerance, also provide P6X, P6, P5, P4, P2 grade tolerance products, all with GB307.1.
ZWZ inch system tapered roller bearings have ordinary level tolerance, according to the need can also provide CL2, CL3, CL0, CL00 level tolerance products.
Radial clearance
ZWZ single row tapered roller bearings only after the installation of clearance, and after there is another bearing positioned in the opposite direction for adjustment to determine.
Cage
Tapered roller bearings generally use steel plate stamping, basket-shaped cage, but the size is larger, also use the car system entity pillar cage.
1. When the bearing outside diameter D ≤ 650mm, the use of steel plate stamping cage, cage after the code are not sign
2. when the bearing outer diameter D>650mm, using steel solid pillar cage, cage after the code does not sign
