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

What is euler operators, What is euler operator Once a polyhedron model...

What is euler operator Once a polyhedron model is available one might want to edit it by adding or deleting vertices, edges and faces to create a new polyhedron. These operatio

Explain the semi universal drilling machine, Explain the semi universal dri...

Explain the semi universal drilling machine The semi universal drilling machine this machines, in addition to the above three basic movements, carry provision for swinging of

Railway station - transport engineering, Railway Station: Types of ...

Railway Station: Types of Stations There are the following types of stations: (a) Terminal stations, Howrah station in Kolkata and Mumbai Central being good exampl

Leak repair torquing procedure, Q. Leak Repair Torquing Procedure? Atte...

Q. Leak Repair Torquing Procedure? Attempt to tighten only the bolts contained within an arc that includes the leak area plus one or two bolts either side of the leak to the or

Determine the reactions at the supports, Determine the reactions at the sup...

Determine the reactions at the supports: A smooth sphere weighing 200 N is resting as shown in Figure. Determine the reactions at the supports. Solution Let us fir

Btec, advantages and disadvantages of kanban

advantages and disadvantages of kanban

Calculations for the force to move a block, Calculations for the force to m...

Calculations for the force to move a block: T wo blocks A and B having weight 4KN and 2KN respectively are in equilibrium position as shown in the figure given below. Coeffi

Select a flat belt drive, It is essential to select a flat belt drive for a...

It is essential to select a flat belt drive for a compressor running at 720 r.p.m which is driven by a 25kW, 1440 r.p.m. motor. Space is available for a distance of 3m. The belt is

Land fill bio gas, working principle of land fill bio gas plant

working principle of land fill bio gas plant

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