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

Maximum slope and maximum deflection, Maximum slope and maximum deflection:...

Maximum slope and maximum deflection: A simply supported beam of span l is subjected to two concentrated loads at one-third span through two supports. Discover the maximum slo

Resolution of a force - mechanics, Resolution of a force: Sol.: When...

Resolution of a force: Sol.: When a force is resolved into two parts along the two mutually perpendicular directions, without changing the effects of it on the body, the par

Define boot strap air evaporative system, Define the following : (a) Boo...

Define the following : (a) Boot Strap Air Evaporative System (b) Simple VCR System (c) Advantage and disadvantage of VCR system over Air Refrigeration System (d) Reduce

Melting point, What is melting point of aluminium?

What is melting point of aluminium?

Driveshaft design, The  impeller driveshaft  can either be top driven or bo...

The  impeller driveshaft  can either be top driven or bottom driven. Again there are advantages of each and the choice often varies with scale of operation: (a) Top driven (labo

Different types of layouts, List and explain four different types of layout...

List and explain four different types of layouts for a factory.

#title.cutting tool life, what is relation between tool life and cutting sp...

what is relation between tool life and cutting speed?

Calculate steady state response, A light cantilever of rectangular section ...

A light cantilever of rectangular section (5cm deep and 2.5 cm wide) has a mass fixed at its free end. Find the ratio of frequency of free lateral vibration in vertical plane to th

Unsymmetrical bending, how to culculate stress in unsymmetrical bending

how to culculate stress in unsymmetrical bending

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