Bearing bronzes, Mechanical Engineering

Assignment Help:

Bearing Bronzes

This is the copper-tin alloys along with small additions of another constitution. Beneath conditions of heavy load and conditions of severe service, bronzes are mostly of great advantages. Therefore, they possess a high resistance to impact loading and, are mostly employed in locomotive and rolling mills bearings. Though, they get heated up fast as compared to another type of bearing materials, as like: babbitts. Bronze lined bearings are easily eliminated and finished bushings are usually available in stocks. Some of the bronzes that are widely employed are described in Table no.22.

                                                                           Table no.22: Bearing Bronzes

 

Bronze and

SAE Number

 

Composition (% )

Mechanical Properties

 

Application

UTS N/mm2

YS N/mm2

Elongation

%

Leaded gun metal, 63

Cu 86-89, Sn 9-11, Pb 1-2.5, P 0.25

max. impurities 0.5 max.

 

200

 

80

 

10

Bushing

Phosphor bronze, 64

Cu 78.5-81.5, Sn 9-11, Pb 0.05-0.25, Zn 0.75

max. impurities 0.25 max.

 

167

 

80

 

8

Heavy loads

Bronze backing for lined bearings 66

Cu 83-86, Sn 4.5-6.0, Pb 8-10, Zn 2.0, impurities 0.25 max.

 

167

 

80

 

8

Bronze backed bearings

Semi-plastic bronze, 67

Cu, 76.5-99.5, Sn 5-7,

Pb 14.5-17.5, Zn 4.0 max., Sb 0.4 max., Fe 0.4 max., impurities 10.0 max.

 

 

133

 

 

-

 

 

10

Soft and good antifriction properties


Related Discussions:- Bearing bronzes

Power transmission system of vehicles, (a) Mention the needs to be satisfie...

(a) Mention the needs to be satisfied by power transmission system of vehicles. (b) What is an overdrive? Explain its principle of operation and advantages.

Evaluate the angle - block impends down the plane, Evaluate the angle - blo...

Evaluate the angle - block impends down the plane: What should be value of the angle shown in the figure so that the motion of the 90N block  impends down the plane? The coe

A, Application of cad

Application of cad

For elevated temperatures, For Elevated Temperatures, Other Materials  ...

For Elevated Temperatures, Other Materials  High temperature creep is a significant phenomenon to be guarded in various machines like gas turbines, missiles, reentry vehicles a

What are the constructional aspects of well foundations, What are the Const...

What are the Constructional Aspects of Well Foundations  There are several aspects which require careful consideration during sinking of well foundations. They are i)  Prepa

What is two way punching shear, What is Two Way Punching Shear? Two Way...

What is Two Way Punching Shear? Two Way Punching Shear In columns, generally the tendency of the column is to punch through the footing.  This also is to be considered in de

Evaluate the dynamically equivalent two mass system, A Small connecting rod...

A Small connecting rod 220mm long between the centres has a mass of 2kg and mass moment of inertia of 0.02 kg- m² about its centre of gravity. The centre of gravity is located at a

Valves, What can a valve do?  It can prevent flow (on/off), allow variable ...

What can a valve do?  It can prevent flow (on/off), allow variable control of the flow and provide a safe working environment. What sort of questions should we be asking when selec

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd