teaching aids text book exercise book sheet of photocopied paper

... y' = 0.154 − 37 TE TE = 1074 n A Textbook of Machine Design First of all let us find the module of teeth Let m = Module in mm, and DP = Pitch circle diameter of the pinion in mm We know that ... the radius of curvature at a point at the tip of the minor axis of an ellipse obtained by taking a section of the gear in the normal plane Mathematically, formative or equivalent number of teeth ... Ans 1078 n A Textbook of Machine Design Design for the rim The thickness of the rim for the pinion may be taken as 1.6 m to 1.9 m, where m is the module Let us take thickness of the rim for...

Ngày tải lên: 25/10/2013, 13:15

... 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 form ... = Actual number of teeth on the gear = where RB m Pitch circle diameter   Module  1086 n A Textbook of Machine Design Notes : The action of bevel gears will be same as that of equivalent spur ... diameter, and d = Dedendum 1084 n A Textbook of Machine Design 30.4 Determination of Pitch Angle for Determina mination for Bevel Gears Consider a pair of bevel gears in mesh, as shown in Fig...

Ngày tải lên: 29/10/2013, 20:15

... know that linear velocity of the worm, l NW vW = 60 1106 n A Textbook of Machine Design and linear velocity of the worm gear, π DG N G vG = 60 Since the linear velocity of the worm and worm gear ... n where n = Number of starts of the worm From above, we see that velocity ratio may also be defined as the ratio of number of teeth on the worm gear to the number of starts of the worm The following ... Design of worm Let lN = Normal lead, and λ = Lead angle 1114 n A Textbook of Machine Design Worm gear of a steering mechanism in an automobile We have discussed in Art 31.12 that the value of x...

Ngày tải lên: 29/10/2013, 20:15

... unit of force adopted is such that it produces a unit acceleration to a body of unit mass ∴ F = m.a = Mass × Acceleration 10 n A Textbook of Machine Design In S.I system of units, the unit of force ... 6000 12 n A Textbook of Machine Design 1.22 Mass Moment of Inertia It has been established since long that a rigid body is composed of small particles If the mass of every particle of a body is ... **** In some of the question papers of the universities and other examining bodies standard values are not used The authors have tried to avoid such questions in the text of the book However,...

Ngày tải lên: 26/12/2013, 00:17

... strength cast iron This type of cast iron is obtained by adding small amounts of magnesium (0.1 to 0.8%) to the molten grey iron The addition of magnesium 24 n A Textbook of Machine Design causes ... are made suitable for cutting tools by firing soft clay objects in a kiln 44 n A Textbook of Machine Design The process of hardening consists of (a) heating the metal to a temperature from 30 ... Since the wear resistance of beryllium copper is five times that of phosphor bronze, therefore, it may be used as a bearing metal in place of phosphor bronze 48 n A Textbook of Machine Design It...

Ngày tải lên: 26/12/2013, 00:17

... controls the size of the hole, as the billet is forced over it * For complete details, please refer to Authors' popular book ‘A Text Book of Workshop Technology’ 60 n A Textbook of Machine Design ... keying fit Heavy keying fit—used for tight assembly of mating parts 72 n A Textbook of Machine Design Type Class of fit With holes Remarks and uses of shaft H6 H8 p p5 *p6 — r r5 *r6 — s s5 *s6 s7 ... processes is beyond the scope of this book, but a few of them which are important from the subject point of view will be discussed in the following pages 3.3 Casting It is one of the most important manufacturing...

Ngày tải lên: 26/12/2013, 00:17

... all specimens of one standard size Since the dimensions of the specimen influence the result, therefore some standard means of comparison of results are necessary 100 n A Textbook of Machine Design ... unnecessary risk of failure The values of factor of safety based on ultimate strength for different materials and type of load are given in the following table: 102 A Textbook of Machine Design ... points : The reliability of the properties of the material and change of these properties during service ; The reliability of test results and accuracy of application of these results to actual...

Ngày tải lên: 26/12/2013, 00:17

... not a direct example of the current chapter 168 n A Textbook of Machine Design Distance of N.A from the top of the flange, yt = y = 28.2 mm Distance of N.A from the bottom of the web, yc = 90 ... Distance of N.A from the bottom of the link, yt = y = 1.2 a mm Distance of N.A from the top of the link, yc = a – 1.2 a = 1.8 a mm Eccentricity of the load (i.e distance of N.A from the point of application ... and the total angle of twist is equal to the sum of the angle of twists of the two shafts Mathematically, total angle of twist, T l1 T l2 + C1 J1 C2 J If the shafts are made of the same material,...

Ngày tải lên: 26/12/2013, 00:17

... value of 20 kN and a maximum value of 50 kN Determine the diameter of bar by taking a factor of safety of 1.5, size effect of 0.85, surface finish factor of 0.9 The material properties of bar ... over a range of Χ 40% Determine the diameter of shaft if a reduction factor of 1.2 is applied to the variable component of bending stress and shearing stress Assume 222 n A Textbook of Machine ... reversed axial load of 180 kN Find the diameter of the rod for a factor of safety of Neglect column action The material has an ultimate tensile strength of 1070 MPa and yield strength of 910 MPa The...

Ngày tải lên: 23/01/2014, 06:20

... Textbook of Machine Design Thickness of pressure tank We know that thickness of pressure tank, t = ∀ 800 p.d # # 24 mm Ans 2!t1 % ∀ 50 ∀ Diameter and thickness of cylinder Let D = Diameter of ... ∗ = 0.29 Thickness of a tube We know that thickness of a tube, +l = t = p d 0.625 !t1 ∀ 100 # # 31.25 mm Ans !t1 !t1 232 n A Textbook of Machine Design Increase in diameter of a tube We know ... the outer surface of the shell The radial stress is maximum at the inner surface and zero at the outer surface of the shell 234 n A Textbook of Machine Design In the design of thick cylindrical...

Ngày tải lên: 23/01/2014, 06:20

... diameter of pipe + × Dia of bolt = D + 2t + 2d = 50 + (2 × 12) + (2 × 22) = 118 mm 278 n A Textbook of Machine Design and side of this square, L + 118 + 83.5 mm 2 The sides of the flange must be of ... 10 mm Number of bolts, n = 0.0275 D + 1.6 (D is in mm) where 272 n A Textbook of Machine Design Thickness of flange, Width of flange, tf = 1.5 t + mm B = 2.3 d Outside diameter of flange, Do ... standardised 270 n A Textbook of Machine Design Note: As soon as the size of pipe is determined, the rest of the dimensions for the flanges, bolts, bolt holes, thickness of pipe may be fixed...

Ngày tải lên: 23/01/2014, 06:20

... 9.25 First of all, let us find the centre of gravity (G) of the rivet system Let x = Distance of centre of gravity from OY, y = Distance of centre of gravity from OX, 326 n A Textbook of Machine ... resistance of the rivets, ∃ Ps = n × ×d2×# (i) 300 n A Textbook of Machine Design where n = Total number of rivets Knowing the inner diameter of the boiler shell (D), and the pressure of steam ... the values of pitch due to Rotscher 316 n A Textbook of Machine Design riv ivets for structural joints Table 9.8 Pitch of rivets for structural joints Thickness of plate (mm) Diameter of rivet...

Ngày tải lên: 23/01/2014, 06:20

... welding (d) all of these 376 n A Textbook of Machine Design In transverse fillet welded joint, the size of weld is equal to (a) 0.5 × Throat of weld (b) Throat of weld (c) (d) × Throat of weld The ... plate of 0.7 m width welded to a structure of similar material by means of two parallel fillet welds of 0.112 m length (each) is subjected to an eccentric load of 4000 N, the line of action of which ... 360 n Let A Textbook of Machine Design la lb l P a b f = = = = = = = Length of weld at the top, Length of weld at the bottom, Total length of weld = la + lb Axial load, Distance of top weld from...

Ngày tải lên: 23/01/2014, 06:20

... chapter 382 n A Textbook of Machine Design Fig 11.10 Basic profile of the thread d = Diameter of nut; D = Diameter of bolt Fig 11.11 Design profile of the nut and bolt 11.5 Location of Screwed Joints ... size of the bolt is M 22 Ans Thickness of the arm of the bracket Let t = Thickness of the arm of the bracket in mm, and b = Depth of the arm of the bracket = 130 mm (Given) 414 n A Textbook of ... of four bolts The bolts are of size 30 mm and are equally spaced on a bolt circle diameter of 500 mm 422 n A Textbook of Machine Design Determine : The distance of the load from the centre of...

Ngày tải lên: 23/01/2014, 06:20

... Diameter of bolt, Diameter of the enlarged end of bolt, Thickness of cotter, and Width of cotter The various modes of failure of the cotter foundation bolt are discussed as below: 454 n A Textbook of ... of the diameter of rod (d ) are as follows : Outside diameter of sleeve, d = 2.5 d Diameter of enlarged end of rod, d = Inside diameter of sleeve = 1.25 d Length of sleeve, L = 8d Thickness of ... diameter of socket, Diameter of spigot or inside diameter of socket, Outside diameter of spigot collar, Thickness of spigot collar, Diameter of socket collar, Thickness of socket collar, Mean width of...

Ngày tải lên: 23/01/2014, 06:20

... A Textbook of Machine Design Dimensions of the key The standard dimensions of the key for a 40 mm diameter shaft are : Width of key, w = 12 mm Ans and thickness of key = mm Ans The length of ... Thickness of the vessel; Diameter of the screw; Cross-section of beam A; Diameter of pins C and D; Diameter of pins E and F; Diameter of pins G and H; and Cross-section of the supports of pins ... find the diameter of the pin at A from bearing considerations Let dp = Diameter of the pin at A, and lp = Length of the pin at A 574 n A Textbook of Machine Design ) Bearing area of the pin at A...

Ngày tải lên: 23/01/2014, 06:20

... parts, = Mass of piston, gudgeon pin etc + rd mass of connecting rod, = Angular speed of crank, = Angle of inclination of the connecting rod with the line of stroke, = Angle of inclination of the crank ... is 0.5 m The pressure of steam is N/mm2 Assume factor of safety as [Ans 31 mm] 622 n A Textbook of Machine Design Determine the diameter of the push rod made of mild steel of an I.C engine if the ... one of these Slenderness ratio is the ratio of (a) maximum size of a column to minimum size of column (b) width of column to depth of column (c) effective length of column to least radius of gyration...

Ngày tải lên: 27/01/2014, 15:20

... A Textbook of Machine Design The cross bar of a planner weighing 12 kN is raised and lowered by means of two square threaded screws of 38 mm outside diameter and mm pitch The screw is made of ... a force of 75 kN at a speed of 300 mm / The screw has a single square thread of mm pitch on a major diameter of 40 mm The coefficient of friction at screw threads is 0.1 Estimate power of the ... 50% or 50% If the 642 n A Textbook of Machine Design 17.11 Coefficient of Friction Coeff Friction The coefficient of friction depends upon various factors like *material of screw and nut, workmanship...

Ngày tải lên: 27/01/2014, 15:20

... A Textbook of Machine Design Cross-sectional area of the belt Let a = Cross-sectional area of the belt First of all, let us find the angle of contact for both the pulleys From the geometry of ... pulley by means of sliding bar having belt forks 686 n A Textbook of Machine Design 18.13 Velocity Ratio of a Belt Dr ive Ratio Driv ive It is the ratio between the velocities of the driver and ... case of a compound belt drive as shown in Fig 18.7, the velocity ratio is given by ∃ Speed of last driven Product of diameters of drivers N4 d1 ( d3 = or & Speed of first driver Product of diameters...

Ngày tải lên: 27/01/2014, 15:20

... instead of arms The thickness of the solid web is taken equal to the thickness of rim measured at the centre of the pulley face 720 n A Textbook of Machine Design (ii) The cross-section of the ... Width of face Length of hub = The length of hub should not be less than 100 mm for 19 mm diameter spokes and 138 mm for 22 mm diameter of spokes Thickness of rim = mm for all sizes A single row of ... 716 n A Textbook of Machine Design 19.2 Types of Pulleys for Flat Belts Following are the various types of pulleys for flat belts : Cast iron pulleys, Steel pulleys, Wooden pulleys, Paper pulleys,...

Ngày tải lên: 27/01/2014, 15:20