text book of machine design

... teeth The pinion is made of cast steel having a static stress of 80 MPa and the gear is made of cast iron with a static stress of 55 MPa The tooth profiles of the gears are of 14 1 /2º composite ... more smoothly than a pair of spur gears with the same number of teeth. 30.7 30.7 StrStrStrength of Beength of Beength of Bevvvel Gearel Gearel Gearsssss The strength of a bevel gear tooth is obtained ... Trang 11080 n A Textbook of Machine DesignAngle for Bevel Gears. 5 Proportions for Bevel Gears. 6 For mative or Equivalent Number of Teeth for Bevel G e a r s — T r e d

Ngày tải lên: 29/10/2013, 20:15

... PrPrProperoperoperties of Lubrties of Lubrties of Lubricantsicants 1 Viscosity. It is the measure of degree of fluidity of a liquid It is a physical property by virtue of which an oil is able to form, retain and offer ... A Textbook of Machine DesignSliding Contact Bearings 6 Important Factors for the Formation of Thick Oil Film. 7 Wedge Film Journal Bearings. 8 Squeeze Film Journal Bearings. 9 Properties of ... requirement of the actual service conditions The choice of material for any application must represent a compromise The following table showsthe comparison of some of the properties of more common

Ngày tải lên: 02/07/2014, 16:21

... types of machines is given in the following table.TTTTTaaable 27.3.ble 27.3.ble 27.3 Life of bear Life of bear Life of bearings fings fings for vor vor varararious types of machinesious types of machinesious ... evidence of fatiguedevelops in the material of one of the rings or any of the rolling elements The rating life of a group of apparently identical ball or roller bearings is defined as the number of ... 1996 n A Textbook of Machine DesignRolling Contact Bearings 996 1 Introduction. 2 Advantages and Disadvantages of Rolling Contact Bearings Over Sliding Contact Bearings. 3 Types of Rolling

Ngày tải lên: 02/07/2014, 16:21

... Mass of piston, gudgeon pin etc + 1 3rd mass of connecting rod, ω = Angular speed of crank, φ = Angle of inclination of the connecting rod with the line of stroke, θ = Angle of inclination of the ... 32.15 32.15 Design of Connecting RodDesign of Connecting Rod In designing a connecting rod, the following dimensions are required to be determined : 1. Dimensions of cross-section of the connecting ... radius of gyration of the section about X-axis,t k ++ Thus, the dimensions of I-section of the connecting rod are : Thickness of flange and web of the section = t = 7 mm Ans. Width of the section,

Ngày tải lên: 02/07/2014, 16:21

... Trang 11066 n A Textbook of Machine DesignHelical Gears 1066 1 Introduction. 2 Terms used in Helical Gears. 3 Face Width of Helical Gears. 4 Formative or Equivalent Number of Teeth for Helical ... defined as the number of teeth that can be generated on the surface of a cylinder having a radius equal to the radius of curvature at a point at the tip of the minor axis of an ellipse obtained ... 8Example 29.3 Design a pair of helical gears for transmitting 22 kW The speed of the driver gear is 1800 r.p.m and that of driven gear is 600 r.p.m The helix angle is 30° and profile is corresponding

Ngày tải lên: 25/10/2013, 13:15

... CONTENTS 2 n A Textbook of Machine Design 1.21.2 1.21.2 1.2 Classifications of Machine DesignClassifications of Machine Design Classifications of Machine DesignClassifications of Machine Design Classifications ... Pr ocedurocedur ocedurocedur ocedur e in Machine Designe in Machine Design e in Machine Designe in Machine Design e in Machine Design In designing a machine component, there is no rigid rule. ... Classifications of Machine Design The machine design may be classified as follows : 1. Adaptive design. In most cases, the designer’s work is concerned with adaptation of existing designs. This type of design

Ngày tải lên: 26/12/2013, 00:17

... 4.14 4.14 Selection of Factor of SafetySelection of Factor of Safety The selection of a proper factor of safety to be used in designing any machine componentdepends upon a number of considerations, ... 2. Weight of machine, 3. Frictional resistances, 4. Inertia of reciprocating parts, 5. Change of temperature, and 6. Lack of balance of moving parts The different forces acting on a machine part ... reliability of the properties of the material and change of these properties duringservice ; 2. The reliability of test results and accuracy of application of these results to actual machineparts

Ngày tải lên: 26/12/2013, 00:17

... Strincipal Strincipal Stresses in Designing Machine Memberesses in Designing Machine Memberesses in Designing Machine MembersssssThere are many cases in practice, in which machine members are subjected ... Total angle of twist When the shafts are connected in series, the total angle of twist is equal to the sum of angle oftwists of the individual shafts Mathematically, the total angle of twist, θ ... Trang 1120 n A Textbook of Machine DesignTorsional and Bending Stresses in Machine Parts 120 1 Introduction. 2 Torsional Shear Stress. 3 Shafts

Ngày tải lên: 26/12/2013, 00:17