OEM Manufacturer Roller Clutch Bearing - Double row tapered roller bearings – CMC

METERIALS

Table 1

The rings and rollers of CMC bearings are made of refined high carbon-chrome bearing steel-GCr15. ( The contrast of Bearing Steel No.of each country.See Table 1.) The cages are punch-pressed from super quality cold rolling steel sheet or nylon cages.The seals are hot-pressed from oil-resistant bone-N rubber with phosphatizing steel skeleton.

PRECISION

Table 2

The precision of inch series bearing is classified in 4.2.3,0 and 00 five classes.0,6/6X、5 and 4 apply to metric series bearings.

The relationship of classes to ISO tolerance classes, etc, see Table 2.

CLEARANCE

Table 3

The radial clearances of tapered bearings are divided into six groups as shown in Table 3.
Special radial clearance or axial clearance requirement could be made as specified in orders.

CLEARANCE

Table 4

The main purposes of bearing lubrication are to prevent metallic contact between the rolling elements, raceways, and cage, and also to prevent the bearing from corrosion and wear. Additional functions are sealing and cooling of the bearing. Bearing may be lubricated with grease or oi,in special cases with a solid lubricant,the choice of which depends primarily on the temperature range, operating speeds, and loading conditions of the bearings concerned.

All lubricants must be changed from time to time because their properties deteriorate as a result of aging and contamination of the lubricants.

The functions for both grease and oil lubrication are given in Table4.

CLEARANCE

CLASSIFICATION

The single row tapered roller bearing has an outer ring, its inner ring and a set of tapered rollers are an inner ring assembly enclosed by a basket-shaped cage. The outer ring can be separated from the inner ring assembly. According to the ISO tapered roller bearing external dimension standard, any standard type of tapered roller bearing outer ring or inner ring assembly should be able to achieve internationality with the same type of outer ring or inner ring assembly exchange. That is, in addition to the external dimensions and tolerances of the outer ring of the same model, which must meet the requirements of ISO492 (GB307), the cone angle and component cone diameter of the inner ring components must also comply with the relevant regulations for interchange.
Generally, the tapered angle of the outer ring raceway of a single-row tapered roller bearing is between 10° and 19°, which can bear the combined action of axial load and radial load at the same time. The larger the cone angle, the greater the ability to withstand axial load. Bearings with large taper angle, add B to the rear code, and the taper angle is between 25°~29°, which can bear larger axial load. In addition, single row tapered roller bearings can adjust the size of the clearance during the installation process.
The outer ring (or inner ring) of a double-row tapered roller bearing is a whole. The small end faces of the two inner rings (or outer rings) are similar, with a spacer in the middle. The clearance is adjusted by the thickness of the spacer. The thickness of the spacer can also be used to adjust the pre-interference of the double-row tapered roller bearing.
Four-row tapered roller bearings. The performance of this type of bearing is basically the same as that of double-row tapered roller bearings, but it bears greater radial load than double-row tapered roller bearings and has a slightly lower limit speed. It is 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. Carry out a new and personalized design of the bearing, change the traditional design method of fully sealed bearings, and adopt a new type of sealing structure that combines sealing and dust prevention to improve the sealing effect and improve the sealing performance. Compared with open structure bearings, multi-sealed double and four-row tapered roller bearings can increase their life by 20% to 40% and reduce lubricant consumption by 80%.