Propeties of taper roller bearings

Post on 25-Jul-2016

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description

Taper roller bearings are made with high accuracy pressed steel cage which controls roller position resulting in low heat generation and reduced wear properties

Transcript of Propeties of taper roller bearings

Taper Roller Bearings

NOBLE & ELEGENTEXCEPTIONAL

QUALITY

Taper Roller Bearing's Design

➔ Taper roller bearings have

>> Inner ring raceway >> Outer ring raceway>> Tapered rollers

➔ It is designed to accommodate combined loads, i.e. simultaneously acting radial and axial loads.

➔ The projection lines of the raceways meet at a common point on the bearing axis to provide true rolling and low friction.

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Taper Roller Bearing's Design

➔ The axial load carrying capacity of tapered roller bearings increases with increasing contact angle . α

➔ The size of the angle is related to the calculation factor e.

➔ The larger the value of e, the larger the contact angle.

➔ A single row tapered roller bearing is typically adjusted against a second tapered roller bearing.

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Features

➔ Robust construction➔ Precisely engineered➔ Easy to install➔ Longer working life

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Geometry

Bearingaxis

Apex

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Dimension SeriesDi

amet

er se

r ies

Width series

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Design Range

Single Row Beaing

Back-to-back arrangementDesignation suffix DB

Face-to-face arrangementDesignation suffix DF

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Single Row Taper Roller Bearings

➔ Single row tapered roller bearings are separable as shown in figure.

➔ That is the inner ring with roller and cage assembly (cone) can be mounted separately from the outer ring (cup).

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Components

➔ Taper Roller Bearings are separatble and have the following components :

- Outer Ring

- Inner Ring

- Roller assembly

➔ Roller assembly is containing the rollers and a cage

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Components

➔ The non-separable inner ring and roller assembly is called the cone, and the outer ring is called the cup.

➔ Internal clearance is established during mounting by the axial position of the cone relative to the cup.

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Roller Forces

Qe = Outer ring/

roller contact force

Qi = Inner ring/

roller contact force

Qf = Roller/

flange contact force

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Effects of Axial & Radial Loads

QR = External radial loadQA = Internal induced axial load

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Applications

➔ In many applications tapered roller bearings are used in back-to-back pairs so that axial forces can be supported equally in either direction.

➔ Pairs of tapered roller bearings are used in car and vehicle wheel bearings where they must cope simultaneously with large vertical (radial) and horizontal (axial) forces.

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Applications➔ Applications for tapered roller bearings are commonly used :

>> Moderate speed>> Heavy duty applications where durability is required

➔ Common real world applications are:

>> Agriculture>> Construction>> Mining equipment>> Axle systems >> Gear box,>> Engine motors and reducers

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Application : Commercial Vehicle

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Application : Worm Gearbox

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