The Most Common Bearing Types - tapered roller bearings

Tapered roller bearings tapered roller bearings belong to separate bearings, bearing inner and Outer Rings are equipped with tapered raceways. These bearings are divided into single-row, double-row and four-row tapered roller bearings and other structural types. Single row tapered roller bearings can withstand radial load and a single direction of axial load. When the bearing bears the radial load, there will be an axial component, so another bearing which can bear the opposite axial force is needed to balance it. It is defined that the capacity of single row tapered roller bearing to bear axial load depends on the contact angle, that is, the angle of Outer Ring Raceway, the greater the axial load capacity. The most widely used tapered roller bearings are single row tapered roller bearings. Small size double row tapered roller bearings are used in the front hub of the car. Four-row tapered roller bearings are used in heavy-duty machines such as large cold and Hot Rolling Mills. Structural characteristics of tapered roller bearings type code for 30000, tapered roller bearings for the separation of bearings. In general, especially in GB/T307.1-94"rolling bearings, radial bearing tolerances" referred to the size range between the outer ring and inner components of tapered roller bearings is 100% interchangeable use. The Angle of the outer ring and the diameter of the outer raceway have been standardized to the same size as the outer dimensions. It is not allowed to be changed during design and manufacturing. Thus, the outer ring and Inner Assembly of tapered roller bearings can be interchanged worldwide. Tapered roller bearings are mainly used to bear radial and axial combined loads. Compared with angular contact ball bearing, the bearing capacity is large and the limit speed is low. Tapered roller bearings are capable of withstanding axial loads in one direction and of limiting axial displacement in one direction of the shaft or housing. Classified single row tapered roller bearings have an outer ring with an inner ring and a group of tapered rollers enclosed by an inner ring assembly of a basket cage. The outer ring can be separated from the Inner Ring Assembly, in accordance with the ISO standard for tapered roller bearings, any standard tapered roller bearing outer ring or Inner Ring Assembly shall be internationally interchangeable with the same type of outer ring or Inner Ring Assembly. The outside dimension and tolerance of the same type of outer ring should be in accordance with ISO492(GB307) . The cone angle and the cone diameter of Inner Ring Assembly should also be in accordance with the interchangeability regulations. Generally, the cone angle of the Raceway of the outer ring of single row tapered roller bearings is between 10 ° and 19 ° , which can bear both axial and radial loads. The larger the cone angle, the greater the capacity of bearing axial load. Large Cone Angle bearing, Code Plus B, Cone Angle between 25 ° ~ 29 ° , it can bear a larger axial load. In addition, single row tapered roller bearings can be installed during the adjustment of the size of the clearance. The outer ring (or inner ring) of double row tapered roller bearings is an integral whole. Two inner ring (or outer ring) small end face close to the middle of the ring, clearance is to rely on the thickness of the ring to adjust, can also be used to adjust the thickness of the ring double row tapered roller bearing pre-interference. Four row tapered roller bearings, this bearing performance and double row tapered roller bearings basically the same, but than double row tapered roller bearings to bear the radial load, the limit speed is slightly lower, mainly used in heavy machinery. Multi-sealed double, four row tapered roller bearings, ZWZ to provide long life, multi-sealed double, four row tapered roller bearings. In order to improve the sealing effect and seal performance, a new type of seal structure combining seal and dust-proof was adopted, which changed the traditional design method of full-seal bearing. Compared with open structure bearing, the life of multi-sealed double-row and four-row tapered roller bearing is increased by 20% ~ 40% , and the lubricant consumption is reduced by 80% . Tapered roller bearings are mainly used to withstand radial-based radial, axial combined load. Bearing capacity depends on the outer ring raceway angle, the larger the angle of the load capacity. The bearings are divided into single-row, double-row and four-row tapered roller bearings according to the number of rolling elements in the bearings. The clearance of single row tapered roller bearing should be adjusted by the user at the time of installation. The clearance of double row and four row tapered roller bearing should not be adjusted by the user. Tapered roller bearings have tapered inner ring and Outer Ring Raceway, tapered roller arrangement between the two. The projection lines of all conical surfaces converge at the same point on the bearing axis. This design makes tapered roller bearings particularly suitable for bearing combined (radial and axial) loads. The axial load capacity of bearings is largely determined by the Contact Angle; the greater the angle, the higher the axial load capacity. The larger the value of e, The greater the contact angle, and the greater the applicability of the bearing to the axial load. Tapered roller bearings are usually of a separate type, I. E. tapered Inner Ring Assemblies consisting of an inner ring with roller and cage assemblies may be mounted separately from the outer ring (outer ring) . Tapered roller bearings are widely used in automobile, rolling mill, mine, metallurgy, plastic machinery and other industries. The following installation information is provided by autotoll automation selection. Adjusting the axial clearance for the installation of tapered roller bearings, the axial clearance can be adjusted by adjusting the nut on the journal, adjusting the threads in the Shim and bearing housing holes, or by pre-tightening the spring. The axial clearance is related to the arrangement of bearings, the distance between bearings and the material of bearings and housings, and can be determined according to the working conditions. For tapered roller bearings with high load and high speed, the effect of temperature rise on axial clearance must be considered when adjusting clearance, and the reduction of clearance caused by temperature rise should be taken into account. For Low speed and vibration bearing, should be adopted no clearance installation, or apply pre-load installation. The purpose is to make the roller and the raceway of the tapered roller bearing have good contact, the load is evenly distributed, and to prevent the roller and the raceway from being destroyed by vibration and impact. After adjustment, the axial clearance is checked by dial indicator. Installation of four-row tapered roller bearings (installation of roller bearings) : one, four-row tapered roller bearing inner ring and roll neck fit is generally with clearance, the installation of the first bearing into the bearing box, and then the bearing box into the journal. Two, four row tapered roller bearing outer ring and bearing box hole also use dynamic fit, first the outer ring a into the bearing box. The symbols { Hottag } are printed on the outer ring, Inner Ring and inner and outer ring when leaving the factory. Can Not be arbitrarily interchanged to prevent the change of bearing clearance. Three, all parts are installed into the bearing box, the inner ring and the inner ring, Outer Ring and outer ring axial close. Measure the gap width between the end face of the outer ring and the cover plate of the bearing box to determine the thickness of the corresponding sealing gasket. POSTCODE XRS for multi-sealed bearings.