Product description quarterly classification：
Tapered roller bearing refers to the radial thrust type rolling bearing whose rolling body is a tapered roller. There are small cone angles and large cone angles. The small cone Angle is mainly subjected to radial load and radial axial load, often into double use, reverse installation, the inner and outer seat ring can be installed respectively, in the installation and use can adjust the radial and axial clearance; The large cone Angle is mainly used to bear axial load and radial load. Generally, it is not used to bear pure axial load alone, but can be used to bear pure radial load when it is configured (relative installation of the same name end).
The type code of tapered roller bearing is 30000, tapered roller bearing is separation type bearing. Under normal circumstances, especially in GB/T307.1-94 “rolling bearing radial bearing tolerance” involved in the size range of tapered roller bearing between the outer ring and the inner component is one hundred percent can be used interchangeably.
The Angle of the outer ring and the diameter of the outer raceway have been standardized with the overall dimensions. Changes during design and manufacture are not allowed. So that the outer ring and inner components of tapered roller bearings can be interchanged worldwide.
Tapered roller bearings are mainly used to bear radial and axial combined loads. Compared with the angular contact ball bearing, the bearing capacity is large, the limit speed is low. Tapered roller bearings can withstand axial load in one direction and can limit axial displacement of shaft or housing in one direction.
A single row tapered roller bearing has an outer ring, its inner ring and an inner ring assembly consisting of a set of tapered rollers enclosed by a basket cage. The outer ring can be separated from the inner ring assembly. According to the ISO tapered roller bearing dimensions standard, the outer ring or inner ring assembly of any standard type of tapered roller bearing should be able to realize international interchange with the same type of outer ring or inner ring assembly. That is, in addition to the external size and tolerance of the outer ring of the same model, the conical Angle of the inner ring component and the cone diameter of the component must also conform to the relevant regulations of exchange.
Usually, the cone Angle of the outer ring raceway of a single row tapered roller bearing is between 10° and 19°, which can withstand the combined action of axial load and radial load at the same time. The larger the cone Angle, the greater the ability to bear axial load. The bearing with large taper Angle, the rear code plus B, the cone Angle between 25°~29°, it can bear large axial load. In addition, single row tapered roller bearings can be adjusted during installation clearance size.
The outer ring (or inner ring) of a double row tapered roller bearing is a whole. The small end face of the two inner rings (or outer rings) is similar, and there is a ring in the middle. The clearance is adjusted by the thickness of the ring, and the thickness of the ring can also be used to adjust the pre-interference of the double row tapered roller bearing.
Four row tapered roller bearings, this kind of bearing performance and double row tapered roller bearings are basically the same, but than double row tapered roller bearings bear greater radial load, the limit speed is slightly lower, mainly used for heavy machinery.
Multi-sealed double and four-row tapered roller bearings, ZWZ provides long life, multi-sealed double and four-row tapered roller bearings. New personalized design of bearings, change the traditional design method of fully sealed bearings, using the combination of sealing and dust-proof new sealing structure type, improve the sealing effect, improve the sealing performance. The service life of multi-sealed double and four-row tapered roller bearings is improved by 20% ~ 40% compared with that of open structure bearings; Lubricant consumption is reduced by 80%.
Tapered roller bearings mainly bear radial and axial combined loads. Bearing capacity depends on the Angle of the raceway of the outer ring, and the greater the Angle, the greater the bearing capacity. This kind of bearing belongs to the separation type bearing, which is divided into single row, double row and four row tapered roller bearings according to the number of rows of rolling body in the bearing. The clearance of single row tapered roller bearing needs to be adjusted by the user during installation; The clearance of double row and four row tapered roller bearings has been set according to the user’s requirements when the product leaves the factory, and does not need to be adjusted by the user.
Tapered roller bearings have a tapered inner ring and an outer ring raceway, and tapered rollers are arranged between them. The projected lines of all conical surfaces meet at the same point on the axis of the bearing. This design makes tapered roller bearings particularly suitable for bearing compound (radial and axial) loads. The axial load capacity of bearings 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 applicability of bearing axial load.
Tapered roller bearings are usually of separate type, that is, a tapered inner ring assembly consisting of an inner ring with a roller and a cage assembly can be mounted separately from the cone outer ring (outer ring).
Tapered roller bearings are widely used in automobile, rolling mill, mining, metallurgy, plastic machinery and other industries.
The basic dimensions of ZWZ tapered roller bearings are listed in the size data sheet,
Single row tapered roller bearing:
Inner diameter range: 20mm ~ 1270mm
Outer diameter range: 40mm to 1465mm
Width: 15mm to 240mm
Double row tapered roller bearing:
Inner diameter range: 38mm ~ 1560mm
Outer diameter range: 70mm to 1800mm
Width range: 50mm to 460mm
Four row tapered roller bearing:
Inside diameter: 130mm to 1600mm
Outer diameter range: 200mm ~ 2000mm
Width: 150mm to 1150mm