A Text Book on Engineering Graphics - Central Board of Secondary ...

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Question: The figure given below (fig 3.12) shows the assembly of an 'Open Bearing'. Disassemble the parts and draw the following views to scale 1:1 : (a) BODY BEARINGS (i) Front view, left half in section. (ii) Top view, without section. (b) BUSH (i) Front view, left half in section. (ii) Side view, viewing from left. Print titles of both and the scale used. Draw the projection symbol. Give '6' important dimensions. 75 15 60 R5 78 R-25 R-15 R-20 150 200 FRONT VIEW RIGHT HALF IN SECTION A TOP VIEW OPEN BUSH BEARING fig 3.12 96 ENGINEERING GRAPHICS 6 6 R5 2 HOLES (25X20) A
A BEARINGS Answer of fig 3.12 20 40 15 60 25 78 R20 ENGINEERING GRAPHICS R5 BODY 150 CRS 200 FRONT VIEW LEFT HALF IN SECTION 20 TOP VIEW SECTION AT AA A R5 R5 25 OPEN BEARING fig 3.13 PLUMMER BLOCK OR PEDESTAL BEARING 6 60 6 LEFT SIDE VIEW The Plummer Block is also known as Pedestal Bearing. This bearing is widely used in textile, marine and some other industries. This bearing is useful for long shafts requiring Intermediate supports; these bearings are preferred in place of ordinary bush bearings. It was named after its inventor 'PLUMMER'. This bearing can be placed any where along the shaft length. It is used for shafts rotating at high speed and needing frequent replacement of brasses (also known as steps) due to the wear and tear of the brasses, which are made up of brass, phosphor- bronze or gun metal having raised collars at two ends for the prevention of the brasses from sliding along the axis, with the shaft. The shaft is made of mild steel. These brasses are made into two halves just to facilitate the easy assembly and disassembly of brasses and shaft. A snug at the bottom, fitting inside a corresponding hole in the body, prevents their rotation. The body is made up of cast iron with rectangular sole plate having elongated holes for the adjustment. In two long holes square mild steel bolts with hexagonal nuts and check nuts are used to tighten the cap and brasses. The cap is made up of cast iron. The cap while resting on the upper brass fits inside the body with its body cap at its sides "but does not sit on it". These brasses are made into two halves and are prevented from rotating by the use of a snug in the middle of the brasses. A counter sunk hole is provided in the top cap and brass to hold lubricant which is necessary for reducing the friction between the shaft and the brasses, which are collared to avoid axial movement. Please examine the given figure for understanding these details. R15 R 25 SECTIONAL FRONT VIEW SCALE 1:1 BUSH 97
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A Text Boo
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Foreword Design is an integral aspe
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PREAMBLE THE CONSTITUTION OF INDIA
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CHAPTER 1 1.1 INTRODUCTION The obje
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ISOMETRIC PROJECTION 1.2.2 POSITION
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ISOMETRIC PROJECTION B C 30 (i) 5 b
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ISOMETRIC PROJECTION Example 4 : So
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ISOMETRIC PROJECTION Steps (i) Draw
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ISOMETRIC PROJECTION Steps (i) Draw
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ISOMETRIC PROJECTION Solution : Exa
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ISOMETRIC PROJECTION Example 14: So
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ISOMETRIC PROJECTION b o B 30 m a H
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ISOMETRIC PROJECTION Example 20 : S
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ISOMETRIC PROJECTION Example 23 : S
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ISOMETRIC PROJECTION 1.3.5 SPHERES
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ISOMETRIC PROJECTION 5. Draw an iso
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ISOMETRIC PROJECTION Steps: 1. Draw
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ISOMETRIC PROJECTION Steps: Exmple
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ISOMETRIC PROJECTION 7. BELOW: CIRC
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ISOMETRIC PROJECTION 30 66 30 15. B
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MACHINE DRAWING Fig 2.1 b : Screw t
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MACHINE DRAWING (v) RIGHT HAND AND
Page 53 and 54: MACHINE DRAWING 2.4 STANDARD PROFIL
Page 55 and 56: MACHINE DRAWING 2.4.2 METRIC THREAD
Page 57 and 58: MACHINE DRAWING Steps involved are
Page 59 and 60: MACHINE DRAWING 2.5 BOLTS In day to
Page 61 and 62: MACHINE DRAWING (vii) The end of th
Page 63 and 64: MACHINE DRAWING 2.5.3 T-BOLT Exampl
Page 65 and 66: MACHINE DRAWING Steps Involved Exer
Page 67 and 68: MACHINE DRAWING Example 10 : Soluti
Page 69 and 70: MACHINE DRAWING 2.6.2 SQUARE NUTS E
Page 71 and 72: MACHINE DRAWING Solution : Steps In
Page 73 and 74: MACHINE DRAWING Steps Involved Exam
Page 75 and 76: MACHINE DRAWING Example 15: Solutio
Page 79 and 80: MACHINE DRAWING 2.10 INTRODUCTION F
Page 81 and 82: MACHINE DRAWING 2.11.3CONVENTIONAL
Page 87 and 88: MACHINE DRAWING Exercises NOTE: Ass
Page 93 and 94: MACHINE DRAWING 2.15.1.3 DOUBLE HEA
Page 95 and 96: 3 CHAPTER All of you have seen a bi
Page 97 and 98: BEARINGS 3. Plummer Block or Pedest
Page 99 and 100: BEARINGS Answer of Fig. 3.3 10 20 2
Page 101 and 102: BEARINGS Question: The figure given
Page 103: BEARINGS R5 R6 2 HOLES FOR BOLTS 24
Page 107 and 108: BEARINGS NOTE : As per our syllabus
Page 109 and 110: BEARINGS Question: The figure given
Page 111 and 112: BEARINGS EXPLODED VIEW OF A FOOT ST
Page 113 and 114: BEARINGS 5 15 15 40 15 15 ENGINEERI
Page 115 and 116: BEARINGS FOOT STEP BEARING Ø 120
Page 117 and 118: ROD JOINTS DIMENSIONS OF A COTTER:
Page 119 and 120: ROD JOINTS SLEEVE AND COTTER JOINT:
Page 121 and 122: ROD JOINTS Solution of fig : 4.5 Qu
Page 123 and 124: ROD JOINTS Answer of fig. 4.9 50 50
Page 125 and 126: ROD JOINTS Question: The details of
Page 127 and 128: ROD JOINTS Exercise: The three view
Page 129 and 130: ROD JOINTS KNUCKLE JOINT OR PIN JOI
Page 131 and 132: ROD JOINTS Question: fig 4.19(a) sh
Page 133 and 134: ROD JOINTS Question: The figure 4.2
Page 135 and 136: ROD JOINTS Exercises: The three vie
Page 137 and 138: ROD JOINTS Dimensions of a Gib and
Page 139 and 140: ROD JOINTS 96 66 12 GIB 26 COTTER T
Page 141 and 142: ROD JOINTS Exercise: The two views
Page 143 and 144: 5 CHAPTER Machines use various part
Page 145 and 146: TIE-ROD AND PIPE JOINTS (We have di
Page 147 and 148: TIE-ROD AND PIPE JOINTS Example 2:
Page 149 and 150: TIE-ROD AND PIPE JOINTS RH SIDE VIE
Page 151 and 152: TIE-ROD AND PIPE JOINTS 5.2.1.1 FEA
Page 153 and 154: TIE-ROD AND PIPE JOINTS (1) FLANGE
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TIE-ROD AND PIPE JOINTS Let us cons
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TIE-ROD AND PIPE JOINTS WHAT HAVE W
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SHAFT COUPLINGS 6.1 FLANGE COUPLING
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SHAFT COUPLINGS It can also be noti
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SHAFT COUPLINGS Ø100 Ø75 Ø50 Ø2
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SHAFT COUPLINGS Exercise 6.1 Fig 6.
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SHAFT COUPLINGS ASSEMBLED PICTORIAL
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SHAFT COUPLINGS Let us take another
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SHAFT COUPLINGS Exercise 6.2 1. FIG
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CHAPTER 7 7.1 INTRODUCTION PULLEYS
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PULLEYS So pulley is a simple machi
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PULLEYS Solution : Ø144 Ø126 Ø11
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PULLEYS Example 3 : Draw the Front
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