30*72*20.25 Tapered roller bearing30306

Tapered roller bearing 30306Dimension :30*72*20.75Once ordered, please inform me which type you need? thanks.

Tapered roller bearings are separate bearings, and the inner and outer rings of the bearings have tapered raceways. This type of bearing is divided into single row, double row and four row tapered roller bearings according to the number of roller rows installed. Single-row tapered roller bearings can withstand radial loads and axial loads in one direction. When the bearing is subjected to a radial load, an axial component will be generated, so when another bearing that can withstand the axial force in the opposite direction is needed to balance it.

Introduction

The tapered roller bearing refers to a radial thrust rolling bearing whose rolling elements are tapered rollers. There are two kinds of small cone angle and large cone angle. The small cone angle mainly bears the combined radial and axial loads mainly dominated by radial loads. It is on used in dual, re installation, the inner and outer races can be installed separately, and the radial and axial clearance can be adjusted during installation and use; The large cone angle mainly bears the combined axial and radial loads that are mainly axial loads. It is generally not used alone to withstand pure axial loads. It can be used to withstand pure radial loads when configured in pairs (relatively installed at the same end).

The ability of single-row tapered roller bearings to bear axial load depends on the contact angle, that is, the outer ring raceway angle. The greater the angle, the greater the axial load capacity. Single-row tapered roller bearings are the most used in tapered roller bearings. In the front wheel hub of the car, small-sized double-row tapered roller bearings are used. Four-row tapered roller bearings are used in heavy hinery such as large cold and hot rolling mills.

Tolerance

Metric tapered roller bearings have ordinary tolerances, and also provide P6X, P6, P5, P4, P2 tolerance products, all in line with GB307.1.

Inch tapered roller bearings have ordinary tolerances, and can also provide CL2, CL3, CL0, and CL00 tolerance products as required.

Suffix definition

A: Internal structure change

B: Increased contact angle

X: External dimensions adopt international standards

CD: Double outer ring, with oil hole or oiroove.

TD: Double inner ring with tapered hole.

Use

Tapered roller bearings mainly bear radial and axial combined loads. The bearing capacity of the bearing depends on the raceway angle of the outer ring.

Tapered roller bearings are usually separated, that is, the tapered inner ring aembly consisting of the inner ring with roller and cage aembly can be installed separately from the tapered outer ring (outer ring).

Tapered roller bearings are widely used in automotive, rolling mill, , metallurgy, plastic hinery and other industries.