THREADED FASTENERS AND SCREWS FOR POWER TRANSMISSION THREADED FASTENERS AND SCREWS FOR POWER TRANSMISSION 18.53 TABLE 18-35 Machine screw heads—pan, hexagon, truss, and 1008 Flat heads Pan head Nominal size No No No No No No No 10 No 12 16 Max diam D Head diam, max, A Height of slotted head, max, H Width of slot, min, J Depth of slot, min, T 0.086 0.099 0.112 0.125 0.138 0.164 0.190 0.216 0.250 0.3125 0.375 0.167 0.193 0.219 0.245 0.270 0.322 0.373 0.425 0.492 0.615 0.740 0.053 0.060 0.068 0.075 0.082 0.096 0.110 0.125 0.144 0.178 0.212 0.023 0.027 0.031 0.035 0.039 0.045 0.050 0.056 0.064 0.072 0.081 0.023 0.027 0.030 0.032 0.038 0.043 0.050 0.060 0.070 0.092 0.113 Hexagon head Radius R Height of recessed head max, O Head diam, max, A Height of head, max, H Width of slot, min, J Depth of slot, min, T 0.035 0.037 0.042 0.044 0.046 0.052 0.061 0.078 0.087 0.099 0.143 0.062 0.071 0.080 0.089 0.097 0.115 0.133 0.151 0.175 0.218 0.261 0.125 0.187 0.187 0.187 0.250 0.250 0.312 0.312 0.375 0.500 0.562 0.050 0.055 0.060 0.070 0.080 0.110 0.120 0.155 0.190 0.230 0.295 0.031 0.035 0.039 0.045 0.050 0.056 0.064 0.072 0.081 0.025 0.030 0.033 0.052 0.057 0.077 0.083 0.100 0.131 Downloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com) Copyright © 2004 The McGraw-Hill Companies All rights reserved Any use is subject to the Terms of Use as given at the website THREADED FASTENERS AND SCREWS FOR POWER TRANSMISSION 18.54 CHAPTER EIGHTEEN TABLE 18-35 Machine screw heads—pan, hexagon, truss, and 1008 Flat heads (Cont.) Truss head Nominal size No No No No No No No 10 No 12 16 16 16 1008 flat head Max diam D Head diam, max, A Height of slotted head, max, H Width of slot, min, J Depth of slot, min, T Radius R 0.086 0.099 0.112 0.125 0.138 0.164 0.190 0.216 0.250 0.3125 0.375 0.4375 0.500 0.5625 0.625 0.750 0.194 0.226 0.257 0.289 0.321 0.384 0.448 0.511 0.573 0.698 0.823 0.948 1.073 1.198 1.323 1.573 0.053 0.061 0.069 0.078 0.086 0.102 0.118 0.134 0.150 0.183 0.215 0.248 0.280 0.312 0.345 0.410 0.023 0.027 0.031 0.035 0.039 0.045 0.050 0.056 0.064 0.072 0.081 0.081 0.091 0.102 0.116 0.131 0.022 0.026 0.030 0.034 0.037 0.045 0.053 0.061 0.070 0.085 0.100 0.116 0.131 0.146 0.162 0.182 0.129 0.151 0.169 0.191 0.211 0.254 0.283 0.336 0.375 0.457 0.538 0.619 0.701 0.783 0.863 1.024 Height of recessed head max, O Head diam, max, A Height of head, max, H Width of slot, min, J Depth of slot, min, T 0.225 0.048 0.031 0.017 0.279 0.332 0.385 0.060 0.072 0.083 0.039 0.045 0.050 0.022 0.027 0.031 0.507 0.635 0.762 0.110 0.138 0.165 0.064 0.072 0.081 0.042 0.053 0.064 Note: Radius of fillet at base of truss- and pan-head machine screws shall not exceed one-half the pitch of the screw thread Truss-, pan-, and 1008 flat-head machine screws may be furnished with cross-recessed heads Hexagon-head machine screws are usually not slotted; the slot is optional Also optional is an upset-head type for hexagon-head machine screws of sizes 4, 5, 8, 12, and in Downloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com) Copyright © 2004 The McGraw-Hill Companies All rights reserved Any use is subject to the Terms of Use as given at the website THREADED FASTENERS AND SCREWS FOR POWER TRANSMISSION THREADED FASTENERS AND SCREWS FOR POWER TRANSMISSION 18.55 TABLE 18-36 Machine-screw heads—binding head Nominal size No No No No No No No 10 No 12 16 Max diam D Head diam, max, A Total height of head, max, O Width of slot, min, J Depth of slot, min, T Height of oval, max, F Diam of undercut,a min, U Depth of undercut, min, X 0.086 0.099 0.112 0.125 0.138 0.164 0.190 0.216 0.250 0.3125 0.375 0.181 0.208 0.235 0.263 0.290 0.344 0.399 0.454 0.513 0.641 0.769 0.046 0.054 0.063 0.071 0.080 0.097 0.114 0.130 0.153 0.193 0.234 0.023 0.027 0.031 0.035 0.039 0.045 0.050 0.056 0.064 0.072 0.081 0.024 0.029 0.034 0.039 0.044 0.054 0.064 0.074 0.088 0.112 0.136 0.018 0.022 0.025 0.029 0.032 0.039 0.045 0.052 0.061 0.077 0.094 0.124 0.143 0.161 0.180 0.199 0.236 0.274 0.311 0.360 0.450 0.540 0.005 0.006 0.007 0.009 0.010 0.012 0.015 0.018 0.021 0.027 0.034 a Use of undercut is optional Note: Binding-head machine screws may be furnished with cross-recessed heads Downloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com) Copyright © 2004 The McGraw-Hill Companies All rights reserved Any use is subject to the Terms of Use as given at the website THREADED FASTENERS AND SCREWS FOR POWER TRANSMISSION 18.56 CHAPTER EIGHTEEN TABLE 18-37 Slotted-head cap screws28 Fillister head Nominal size (body diam, max) D Flat head Round head Width of slot min, J Head diam, max, A Height of head, max, H Total height of head, max, O Depth of slot, min, T Head diam, max, A Height of head average, H Depth of slot, min, T Head diam, max, A Height of head, max, H Depth of slot, min, T 16 16 0.064 0.072 0.081 0.081 0.091 0.375 0.437 0.562 0.625 0.750 0.172 0.203 0.250 0.297 0.328 0.216 0.253 0.314 0.368 0.412 0.077 0.090 0.113 0.133 0.148 0.500 0.625 0.750 0.8125 0.875 0.140 0.176 0.210 0.210 0.210 0.046 0.057 0.069 0.069 0.069 0.437 0.562 0.625 0.750 0.812 0.191 0.246 0.273 0.328 0.355 0.097 0.126 0.135 0.167 0.179 16 8 0.812 0.875 1.000 1.125 1.312 0.375 0.422 0.500 0.594 0.656 0.466 0.521 0.612 0.720 0.802 0.169 0.190 0.233 0.264 0.292 1.000 1.125 1.375 1.625 1.875 0.245 0.281 0.352 0.423 0.494 0.080 1.092 0.115 0.139 0.162 0.937 1.000 0.125 0.410 0.438 0.547 0.208 0.220 0.227 0.102 0.116 0.131 0.147 0.166 11 11 13 11 0.178 0.193 0.208 0.240 — — — — — — — — — — — — — — — — 2.062 2.312 2.562 2.812 0.529 0.600 0.665 0.742 0.173 0.197 0.220 0.244 Downloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com) Copyright © 2004 The McGraw-Hill Companies All rights reserved Any use is subject to the Terms of Use as given at the website THREADED FASTENERS AND SCREWS FOR POWER TRANSMISSION THREADED FASTENERS AND SCREWS FOR POWER TRANSMISSION 18.57 TABLE 18-38 Socket-head cap screws Hexagona Socket width across flats, min, J Fluted socket Number of flutes Socket diam minor, min, K Socket diam major, min, M Width of socket land, max, N Nominal size Body diam, max, D Head diam, max, A Head height max, H Head side height, max, S No No No No No 0.060 0.073 0.0860 0.0990 0.1120 0.096 0.118 0.140 0.161 0.183 0.086 0.099 0.112 0.0803 0.0923 0.1043 16 64 64 6 0.063 0.080 0.080 0.073 0.097 0.097 0.016 0.022 0.022 No No No No 10 No 12 0.1250 0.1380 0.1640 0.1900 0.2160 0.205 0.226 0.270 16 11 32 0.125 0.138 0.164 0.190 0.216 0.1163 0.1284 0.1522 0.1765 0.2005 32 32 32 32 6 6 0.096 0.096 0.126 0.161 0.161 0.113 0.113 0.147 0.186 0.186 0.025 0.025 0.032 0.039 0.039 16 16 0.2500 0.3125 0.3750 0.4375 0.5000 16 16 4 16 16 0.2317 0.2894 0.3469 0.4046 0.4620 16 32 16 16 6 6 0.188 0.219 0.316 0.316 0.383 0.219 0.254 0.377 0.377 0.460 0.050 0.060 0.092 0.092 0.112 16 8 13 16 11 116 16 8 0.5625 0.6250 0.7500 0.8750 1.0000 0.5196 0.5771 0.6920 0.8069 0.9220 16 16 6 6 0.383 0.506 0.531 0.600 0.681 0.460 0.601 0.627 0.705 0.797 0.112 0.138 0.149 0.168 0.189 11 11 13 11 1.1250 1.2500 1.3750 1.5000 11 13 17 11 11 13 11 1.0372 1.1516 1.2675 1.3821 4 6 6 0.824 0.824 0.824 1.003 0.966 0.966 0.966 1.271 0.231 0.231 0.231 0.298 a Maximum socket depth T should not exceed three-fourths of minimum head height H Note: Head chamfer angle E is 28 to 328, the edge between flat and chamfer being slightly rounded Screw point chamfer angle 35 to 408, the chamfer extending to the bottom of the thread Edge between flat and chamfer is slightly rounded Downloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com) Copyright © 2004 The McGraw-Hill Companies All rights reserved Any use is subject to the Terms of Use as given at the website THREADED FASTENERS AND SCREWS FOR POWER TRANSMISSION 18.58 CHAPTER EIGHTEEN TABLE 18-39 Square-head set screws28 Width across flats F Nominal size No 10 No 12 16 16 16 8 11 11 13 11 0.190 0.216 0.250 0.3125 0.3750 0.4375 0.500 0.5625 0.6250 0.750 0.875 1.000 1.125 1.250 1.376 1.500 Width across corners G Height of head H Diam of neck relief K Radius of head X Radius Width of neck of neck relief relief R U Max Min Min Nom Max Min Max Min Nom Max Max 0.1875 0.216 0.250 0.3125 0.375 0.4375 0.500 0.5625 0.625 0.750 0.875 1.000 1.125 1.250 1.375 1.500 0.180 0.208 0.241 0.302 0.362 0.423 0.484 0.545 0.606 0.729 0.852 0.974 1.096 1.219 1.342 1.464 0.247 0.292 0.331 0.415 0.497 0.581 0.665 0.748 0.833 1.001 1.170 1.337 1.505 1.674 1.843 2.010 64 32 16 15 64 32 31 64 27 64 15 32 16 21 32 27 32 15 16 132 18 0.148 0.163 0.196 0.245 0.293 0.341 0.398 0.437 0.485 0.582 0.678 0.774 0.870 0.966 1.063 1.159 0.134 0.147 0.178 0.224 0.270 0.315 0.361 0.407 0.452 0.544 0.635 0.726 0.817 0.908 1.000 1.091 0.145 0.162 0.185 0.240 0.294 0.345 0.400 0.454 0.507 0.620 0.731 0.838 0.939 1.064 1.159 1.284 0.140 0.156 0.170 0.225 0.279 0.330 0.385 0.439 0.492 0.605 0.716 0.823 0.914 1.039 1.134 1.259 15 32 35 64 25 32 15 16 132 14 113 32 116 18 216 21 213 16 31 316 34 0.027 0.029 0.032 0.036 0.041 0.046 0.050 0.054 0.059 0.065 0.072 0.081 0.092 0.092 0.109 0.109 0.083 0.091 0.100 0.111 0.125 0.143 0.154 0.167 0.182 0.200 0.222 0.250 0.283 0.283 0.333 0.333 Downloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com) Copyright © 2004 The McGraw-Hill Companies All rights reserved Any use is subject to the Terms of Use as given at the website THREADED FASTENERS AND SCREWS FOR POWER TRANSMISSION THREADED FASTENERS AND SCREWS FOR POWER TRANSMISSION 18.59 TABLE 18-40 Square-head setscrew points28 Full-dog, half-dog, and pivot pointa Nom Max Min Oval (round) point radius J, nom 16 32 64 11 64 13 64 0.102 0.115 0.132 0.172 0.212 0.088 0.101 0.118 0.156 0.194 0.141 0.156 0.188 0.234 0.281 0.127 0.144 0.156 0.203 0.250 0.120 0.137 0.149 0.195 0.241 0.090 0.110 0.125 0.156 0.188 0.045 0.055 0.063 0.078 0.094 16 16 16 64 32 16 22 64 16 0.252 0.291 0.332 0.371 0.450 0.232 0.270 0.309 0.347 0.425 0.328 0.375 0.422 0.469 0.563 0.297 0.344 0.391 0.469 0.563 0.287 0.334 0.379 0.456 0.549 0.219 0.250 0.281 0.313 0.375 0.109 0.125 0.140 0.156 0.188 11 11 13 33 64 19 32 43 64 53 64 0.530 0.609 0.689 0.767 0.848 0.502 0.579 0.655 0.733 0.808 0.656 0.750 0.844 0.938 1.031 0.656 0.750 0.844 0.938 1.031 0.642 0.734 0.826 0.920 1.011 0.438 0.500 0.562 0.625 0.688 0.219 0.250 0.281 0.312 0.344 11 29 32 0.926 0.886 1.125 1.125 1.105 0.750 0.375 Diam of cap and flat points C Nominal size No 10 No 12 Min Full dog and pivot Q Half dog q Diam P Max a Pivot points are similar to full-dog point except that the point is rounded by a radius equal to J Where usable length of thread is less than the nominal diameter, half-dog point shall be used When length equals nominal diameter or less, Y ẳ 1188 ặ 28; when length exceeds nominal diameter, Y ẳ 908 ặ 28 Note: All dimensions are given in inches Downloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com) Copyright © 2004 The McGraw-Hill Companies All rights reserved Any use is subject to the Terms of Use as given at the website THREADED FASTENERS AND SCREWS FOR POWER TRANSMISSION 18.60 CHAPTER EIGHTEEN TABLE 18-41 Slotted headless setscrews28 Radius of headless crown I Width of slot J Depth of slot T Ovalpoints radius R Max Min Max Min Fill Q Half q 0.125 0.138 0.164 0.190 0.216 0.125 0.138 0.164 0.190 0.216 0.023 0.025 0.029 0.032 0.036 0.031 0.035 0.041 0.048 0.054 0.094 0.109 0.125 0.141 0.156 0.067 0.074 0.087 0.102 0.115 0.057 0.064 0.076 0.088 0.101 0.083 0.092 0.109 0.127 0.144 0.078 0.087 0.103 0.120 0.137 0.060 0.070 0.080 0.090 0.110 0.030 0.035 0.040 0.045 0.055 16 16 0.250 0.3125 0.375 0.4375 0.250 0.313 0.375 0.438 0.045 0.051 0.064 0.072 0.063 0.078 0.094 0.109 0.188 0.234 0.281 0.328 0.132 0.172 0.212 0.252 0.118 0.156 0.194 0.232 0.156 0.203 0.250 0.297 0.149 0.195 0.241 0.287 0.125 0.156 0.188 0.219 0.063 0.078 0.094 0.109 16 0.500 0.5625 0.625 0.750 0.500 0.563 0.625 0.750 0.081 0.091 0.102 0.129 0.125 0.141 0.156 0.188 0.375 0.422 0.469 0.563 0.291 0.332 0.371 0.450 0.270 0.309 0.347 0.425 0.344 0.391 0.469 0.563 0.344 0.379 0.456 0.549 0.250 0.281 0.313 0.375 0.135 0.140 0.156 0.188 Nominal size D 10 12 Diam of cup and flat points C Diam of dog point P Length of dog pointa a Where usable length thread is less than the nominal diameter, half-dog point shall be used When L (length of screw) equals nominal diameter or less, Y ẳ 1188 ặ 28; when L exceeds nominal diameter, Y ẳ 908 ặ 28 Point angles ẳ 80 to 908; X ẳ 1188 ặ 58; Z ẳ 100 to 1108 Allowable eccentricity of dog point axis with respect to axis of screw shall not exceed 3% of nominal screw diameter with maximum 0.005 in Note: All dimensions given in inches Downloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com) Copyright © 2004 The McGraw-Hill Companies All rights reserved Any use is subject to the Terms of Use as given at the website 0.087 0.102 0.115 No No 10 No 12 0.061 No 0.067 0.054 No 0.074 0.047 No No 0.040 No No 0.033 No Downloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com) Copyright © 2004 The McGraw-Hill Companies All rights reserved Any use is subject to the Terms of Use as given at the website 0.101 0.088 0.076 0.064 0.057 0.051 0.045 0.039 0.033 0.027 Cup- and Screw flat-point size diameter nominal C diam D Max Min 32 64 64 32 0.084 16 64 0.055 64 Ovalpoint radius R 8 16 16 16 16 64 32 64 118 Æ 28 for these lengths and under 16 16 4 64 32 64 32 0.053 0.045 0.037 0.075 0.078 0.070 0.066 0.120 0.109 0.127 0.137 0.103 0.092 0.144 0.087 0.083 0.062 0.057 0.049 0.040 0.11 0.09 0.08 0.07 0.06 0.056 0.050 0.043 0.037 0.030 0.055 0.045 0.04 0.035 0.03 0.028 0.025 0.022 0.019 0.015 0.075 0.075 0.062 0.050 0.050 0.040 0.040 0.028 0.028 0.022 90 Ỉ 28 Dog point for these lengths Diam P Key and engagement† over Max Min Full Q Half q Cone-point angle Y Fluted and hexagon socket types TABLE 18-42 Fluted and hexagon socket-headless setscrews24 0.0947 0.0947 0.0791 0.0635 0.0635 0.051 0.051 0.0355 0.0355 0.0285 Max 16 16 64 32 32 0.050 0.050 0.035 0.035 0.028 Min Socket width across flats J Hexagon type 0.098 0.098 0.082 0.056 0.053 0.051 0.038 0.038 0.026 0.026 Max 0.096 0.096 0.080 0.055 0.052 0.050 0.0375 0.0375 0.0255 0.0255 Min Socket diam, minor, J 0.115 0.115 0.098 0.079 0.071 0.062 0.050 0.050 0.035 0.035 Max 0.113 0.113 0.097 0.078 0.070 0.061 0.049 0.049 0.034 0.034 Min Socket diam, major, M Fluted typea 0.025 0.025 0.022 0.023 0.022 0.014 0.017 0.017 0.012 0.012 Max 0.023 0.023 0.021 0.022 0.021 0.013 0.016 0.016 0.0115 0.0115 Min Socket land width N THREADED FASTENERS AND SCREWS FOR POWER TRANSMISSION 18.61 0.118 0.156 0.270 0.252 0.291 0.309 0.232 0.212 0.808 0.886 1.039 0.848 0.926 1.086 1.244 1.193 11 27 32 15 16 132 18 116 27 64 15 32 16 21 32 16 15 64 32 21 64 Ovalpoint radius R 11 13 11 13 11 16 8 16 16 118 Ỉ 28 for these lengths and under 21 11 15 13 11 11 8 16 16 16 11 27 32 15 16 132 18 116 25 64 15 32 16 21 32 32 13 64 19 64 11 32 1.474 1.289 1.011 1.105 0.920 0.826 0.734 0.642 0.456 0.549 0.379 0.334 0.287 0.241 0.149 0.195 16 11 16 32 16 16 32 16 32 16 16 11 32 16 64 32 16 32 16 64 32 64 0.800 0.800 0.500 0.600 0.500 0.450 0.450 0.400 0.250 0.300 0.200 0.200 0.175 0.150 0.100 0.125 90 Ỉ 28 Dog point for these lengths Diam P Key and engagementb over Max Min Full Q Half q 1.0040 0.0040 0.6290 0.7540 0.6290 0.5655 0.5655 0.5030 0.3155 0.3780 0.2520 0.2520 0.2207 0.1895 0.1270 0.1582 Max 1 16 8 4 16 16 32 16 32 Min Socket width across flats J Hexagon type 1.007 1.007 0.744 0.828 0.685 0.604 0.535 0.509 0.319 0.386 0.254 0.254 0.221 0.190 0.128 0.163 Max 1.003 1.003 0.740 0.824 0.681 0.600 0.531 0.506 0.316 0.383 0.252 0.252 0.219 0.188 0.126 0.161 Min Socket diam, minor, J 1.275 1.275 0.869 0.970 0.801 0.709 0.631 0.604 0.380 0.463 0.298 0.298 0.256 0.221 0.149 0.188 Max 1.271 1.271 0.865 0.966 0.797 0.705 0.627 0.601 0.377 0.460 0.296 0.296 0.254 0.219 0.147 0.186 Min Socket diam, major, M Fluted typea 0.298 0.298 0.207 0.231 0.189 0.168 0.149 0.138 0.092 0.112 0.068 0.068 0.060 0.050 0.032 0.039 Max 0.294 0.294 0.203 0.227 0.185 0.164 0.145 0.134 0.089 0.109 0.066 0.066 0.058 0.048 0.030 0.037 Min Socket land width N b The number of flutes for setscrews Nos 0, 1, 2, 3, 5, and is four The number of flutes for Nos 4, 8, and larger is six These dimensions apply to cup- and flat-point screws one diameter in length or longer For screws shorter than one diameter in length, and for other types of points, socket to be as deep as practicable Note: All dimensions are given in inches Source: Courtesy: John J Viegas, Standards for Mechanical Elements, Harold A Rothbart, Editor-in-Chief; Mechanical Design and Systems Handbook, McGraw-Hill Publishing Company, New York, 1964 a 0.733 0.767 11 13 11 13 0.655 0.689 11 0.502 0.530 0.579 0.371 0.450 0.609 0.347 0.425 0.332 0.194 0.132 0.172 16 8 16 16 Cup- and Screw flat-point size diameter nominal C diam D Max Min Cone-point angle Y Fluted and hexagon socket types TABLE 18-42 Fluted and hexagon socket-headless setscrews24 (Cont.) THREADED FASTENERS AND SCREWS FOR POWER TRANSMISSION 18.62 Downloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com) Copyright © 2004 The McGraw-Hill Companies All rights reserved Any use is subject to the Terms of Use as given at the website COUPLINGS, CLUTCHES, AND BRAKES 19.2 F F1 F2 Fa Fb Fc Fn Fx , Fy F g h H Hg Hd i i1 i2 i0 I kl ks l L Mt Mta n n1 , n2 n P N N p CHAPTER NINETEEN operating force on block brakes, kN (lbf ); force at each pin in the flexible bush coupling, kN (lbf ) total pressure, kN (lbf ) force (also with suffixes), kN (lbf ) actuating force, kN (lbf ) tension on tight side of band, kN (lbf ) the force acting on disks of one operating lever of the clutch (Fig 19-16), kN (lbf ) tension on slack side of band, kN (lbf ) total axial force on i number of clutch disks, kN (lbf ) tension load in each bolt, kN (lbf ) centrifugal force, kN (lbf ) total normal force, kN (lbf ) components of actuating force F acting at a distance c from the hinge pin (Figs 19-25 and 19-26), kN (lbf ) tangential force at rim of brake wheel, kN (lbf ) tangential friction force, kN (lbf ) acceleration due to gravity, 9.8066 m/s2 (9806.6 mm/s2 ) (32.2 ft/s2 ) thickness of key, m (in) thickness of central disk in Oldham’s coupling, m (in) thickness of operating lever (Fig 19-16), m (in) depth of spring in centrifugal clutch, m (mm) rate of heat to be radiated, J (kcal) heat generated, J (kcal) the rate of dissipation, J (kcal) number of pins, number of bolts, number of rollers, pairs of friction surfaces number of shoes in centrifugal clutch number of times the fluid circulates through the torus in one second number of driving disks number of driven disks number of operating lever of clutch moment of inertia, area, m4 , cm4 (in4 ) load factor or the ratio of the actual brake operating time to the total cycle of operation speed factor length (also with suffixes), m (in) length of spring in centrifugal clutch measured along arc, m (in) length of bush, m (in) dimension of operating lever as shown in Fig 19-16 torque to be transmitted, N m (lbf in) allowable torque, N m (lbf in) speed, rpm speed of the live load before and after the brake is applied, respectively, rpm number of clutching or braking cycles per hour power, kW (hp) normal force (Figs 19-25 and 19-26), kN (lbf ) frictional force (Figs 19-25 and 19-26), kN (lbf ) unit pressure, MPa (psi) Downloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com) Copyright © 2004 The McGraw-Hill Companies All rights reserved Any use is subject to the Terms of Use as given at the website COUPLINGS, CLUTCHES, AND BRAKES COUPLINGS, CLUTCHES, AND BRAKES p pa pb P P0 r rm rmi rmo R Rc Rd Rr Rx , Ry t Ta Tav ÁT tc v v1 , v2 w W y b 0b cðmaxÞ db b d1 d2 f s unit pressure acting upon an element of area of the frictional material located at an angle from the hinge pin (Figs 19-25 and 19-26), MPa (psi) maximum pressure between the fabric and the inside of the rim, MPa (psi) allowable pressure, MPa (psi) maximum pressure located at an angle a from the hinge pin (Figs 19-25 and 19-26), MPa (psi) bearing pressure, MPa (psi) total force acting from the side of the bush on operating lever (Fig 19-16), kN (lbf ) the force acting from the side of the bush on one operating lever, kN (lbf ) radius, m (in) distance from the center of gravity of the shoe from the axis of rotation, m (in) mean radius, m (in) mean radius of inner passage of hydraulic coupling, m (in) mean radius of outer passage in hydraulic coupling, m (in) reaction (also with suffixes), kN (lbf ) radius of curvature of the ramp at the point of contact (Fig 19-21), m (in) radius of the contact surface on the driven member (Fig 19-21), m (in) radius of the roller (Fig 19-21), m (in) hinge pin reactions (Figs 19-25 and 19-26), kN (lbf ) time of single clutching or braking operation (Eq 19-198), s ambient or initial temperature, 8C (8F) average equilibrium temperature, 8C (8F) rise in temperature of the brake drum, 8C (8F) cooling time, s (min) velocity, m/s speed of the live load before and after the brake is applied, respectively, m/s axial width in cone brake, m (in) width of band, m (in) work done, N m (lbf in) weight of the fluid flowing in the torus, kN (lbf ) weight lowered, kN (lbf ) weight of parts in Eq (19-136), kN (lbf ) weight of shoe, kN (lbf ) deflection, m (in) stress (also with suffixes), MPa (psi) allowable or design stress in bolts, MPa (psi) design bearing stress for keys, MPa (psi) maximum compressive stress in Hertz’s formula, MPa (psi) design bending stress, MPa (psi) shear stress, MPa (psi) allowable or design stress in bolts, MPa (psi) design shear stress in sleeve, MPa (psi) design shear stress in key, MPa (psi) design shear stress in flange at the outside hub diameter, MPa (psi) design shear stress in shaft, MPa (psi) one-half the cone angle, deg pressure angle, deg Downloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com) Copyright © 2004 The McGraw-Hill Companies All rights reserved Any use is subject to the Terms of Use as given at the website 19.3 COUPLINGS, CLUTCHES, AND BRAKES 19.4 CHAPTER NINETEEN friction angle, deg one-half angle of the contact surface of block, deg coefficient of friction factor which takes care of the reduced strength of shaft due to keyway running speed of centrifugal clutch, rad/s speed at which the engagement between the shoe of centrifugal clutch and pulley commences, rad/s !1 !2 SUFFIXES a d g 1, i 2, o n x y axial dissipated, design generated inner outer normal x direction y direction tangential friction Other factors in performance or in special aspects are included from time to time in this chapter and, being applicable only in their immediate context, are not included at this stage Particular Formula 19.1 COUPLINGS COMMON FLANGE COUPLING (Fig 19-1) i ẳ 20d ỵ The commonly used formula for approximate number of bolts SI 19-1aị USCS 19-1bị where d in m i ẳ 0:5d ỵ where d in in Mt ẳ d 16 s Mt ¼ 1000P ! The torque transmitted by the shaft The torque transmitted by the coupling ð19-2Þ SI ð19-3aÞ USCS ð19-3bÞ where Mt in N m; P in kW; ! in rad/s Mt ¼ 63;000P n where Mt in lbf in; P in hp, n in rpm Mt ¼ 9550P n SI Downloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com) Copyright © 2004 The McGraw-Hill Companies All rights reserved Any use is subject to the Terms of Use as given at the website ð19-3cÞ COUPLINGS, CLUTCHES, AND BRAKES COUPLINGS, CLUTCHES, AND BRAKES Particular 19.5 Formula FIGURE 19-1 Flange coupling where Mt in N m; P in kW; n in rpm 159P SI n0 where Mt in N m; P in kW; n in rps 2 d1 D Mt ¼ i b Mt ẳ The torque transmitted through bolts 19-3dị 19-4ị The torque capacity which is based on bearing of bolts Mt ¼ iðd1 l1 Þb D1 ð19-5Þ The torque capacity which is based on shear of flange at the outside hub diameter Mt ẳ tD2 ị f D2 19-6ị The friction-torque capacity of the flanged coupling which is based on the concept of the friction force acting at the mean radius of the surface Mt ¼ i Fb rm where rm ẳ 19-7ị Dỵd ẳ mean radius Fb ẳ tension load in each bolt, kN (kgf ) The preliminary bolt diameter may be determined by the empirical formula The bolt diameter from Eqs (19-2) and (19-4) The bolt diameter from Eqs (19-3) and (19-4) 0:5d d1 ¼ pffi i sffiffiffiffiffiffiffiffiffiffiffiffiffiffi d s d1 ¼ 2i b D1 sffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffi 8000P d1 ẳ i! b D1 19-8ị 19-9ị SI Downloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com) Copyright © 2004 The McGraw-Hill Companies All rights reserved Any use is subject to the Terms of Use as given at the website ð19-10aÞ COUPLINGS, CLUTCHES, AND BRAKES 19.6 CHAPTER NINETEEN Particular Formula where d1 , D1 in m; P in kW; b in Pa; ! in rad/s s 1273P d1 ẳ SI 19-10bị in0 D1 b where d1 , D1 in m; P in kW; b in Pa; n0 in rps sffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffi 76;400P SI 19-10cị d1 ẳ in b D1 where d1 , D1 in m; P in kW; b in Pa; n in rpm s 50;400P d1 ẳ USCS 19-10dị inD1 b The diameter of shaft from Eqs (19-2) and (19-3) where d1 , D1 in in; P in hp; b in psi; ! in rpm where i ¼ effective number of bolts doing work should be taken as all bolts if they are fitted in reamed holes and only half the total number of bolts if they are not fitted into reamed holes s 16;000P dẳ SI 19-11aị ! s where P in kW; d in m sffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffi 100;800P d¼ n s USCS ð19-11bÞ SI ð19-11cÞ SI ð19-11dÞ SI ð19-12aÞ USCS ð19-12bÞ SI 19-13aị where D2 in m D2 ẳ 1:5d ỵ USCS 19-13bị D ẳ 2:5d ỵ 0:075 SI 19-14aị USCS ð19-14bÞ where P in hp; d in in sffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffi 152;800P d¼ n s where P in kW; d in m sffiffiffiffiffiffiffiffiffiffiffiffiffi 2546P d¼ n0 s where P in kW; d in m; n0 in rps The average value of diameter of the bolt circle D1 ẳ 2d ỵ 0:05 where D1 in m D1 ẳ 2d ỵ The hub diameter The outside diameter of flange D2 ¼ 1:5d ỵ 0:025 where D in m D ẳ 2:5d þ Downloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com) Copyright © 2004 The McGraw-Hill Companies All rights reserved Any use is subject to the Terms of Use as given at the website COUPLINGS, CLUTCHES, AND BRAKES COUPLINGS, CLUTCHES, AND BRAKES Particular The hub length 19.7 Formula l ¼ 1:25d ỵ 0:01875 SI 19-14cị USCS 19-14dị SI 19-15aị USCS ð19-15bÞ where l in m and d in m l ẳ 1:25d ỵ 0:75 where l and d in in MARINE TYPE OF FLANGE COUPLING Solid rigid type [Fig 19-2(a), Table 19-1] The number of bolts i ẳ 33d ỵ where d in in i ẳ 0:85d ỵ The diameter of bolt where d in in sffiffiffiffiffiffiffiffiffiffiffiffiffiffi d s d1 ¼ 2iD1 b based on torque capacity of the shaft sffiffiffiffiffiffiffiffiffiffiffiffiffiffi tD2 f d1 ¼ 4iD1 b ð19-16aÞ ð19-16bÞ based on torque capacity of flange FIGURE 19-2 Rigid marine coupling The thickness of flange t ¼ 0:25 to 0:28d ð19-17Þ The diameter of the bolt circle D1 ẳ 1:4d to 1:6d 19-18ị The outside diameter of ange D ẳ D1 ỵ 2d to 3d 19-19ị Taper of bolt in 100 Downloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com) Copyright © 2004 The McGraw-Hill Companies All rights reserved Any use is subject to the Terms of Use as given at the website COUPLINGS, CLUTCHES, AND BRAKES 19.8 CHAPTER NINETEEN TABLE 19-1 Forged end type rigid couplings (all dimensions in mm) Number coupling Shaft diameter Recessed flange Spigot flange Flange outside Locating diameter, Flange diameter, Recess depth, c1 Max Min D width, t D2 R1 R2 R3 R4 R5 R6 R7 R8 R9 R10 R11 R12 R13 R14 R15 R16 R17 R18 R19 R20 R21 R22 R23 R24 S1 S2 S3 S4 S5 S6 S7 S8 S9 S10 S11 S12 S13 S14 S15 S16 S17 S18 S19 S20 S21 S22 S23 S24 53 45 55 70 80 90 110 130 150 170 190 210 230 250 270 300 330 360 390 430 470 520 571 620 — 36 46 55 71 81 91 111 131 151 171 191 211 231 251 271 301 331 361 391 431 471 521 571 100 120 140 175 195 225 265 300 335 375 400 445 475 500 560 600 650 730 775 875 900 925 1000 1090 17 22 22 27 32 32 36 46 50 55 55 65 70 70 80 85 90 100 105 110 115 120 125 130 50 60 75 95 95 125 150 150 195 195 240 240 280 280 330 330 400 400 480 480 560 560 640 720 6 7 7 9 10 10 10 10 10 10 10 10 10 11 11 11 12 12 12 Spigot depth, c2 Pitch circle Bolt Bolt hole diameter, size, diameter, Number D1 d1 d2 H8 of bolts 4 5 5 7 8 8 8 8 9 10 10 10 70 85 100 125 140 160 190 215 240 265 290 315 340 370 400 410 480 520 570 620 670 730 790 850 M10 11 M12 13 M14 15 M16 17 M18 19 20 21 24 25 30 32 33 34 36 38 36 38 42 44 45 46 45 46 52 55 56 60 60 65 68 72 72 76 76 80 80 85 90 95 110 105 110 115 Downloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com) Copyright © 2004 The McGraw-Hill Companies All rights reserved Any use is subject to the Terms of Use as given at the website 4 6 6 8 8 10 10 10 10 10 10 12 12 12 12 12 COUPLINGS, CLUTCHES, AND BRAKES COUPLINGS, CLUTCHES, AND BRAKES Particular 19.9 Formula Hollow rigid type [Fig 19-2(b)] i ¼ 50Do The minimum number of bolts SI ð19-20aÞ USCS ð19-20bÞ where Do in m i ¼ 1:25Do where Do in in sffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffi ð1 K ịD3 s o d1 ẳ 2iD1 b The mean diameter of bolt where K ¼ The thickness of ange tẳ 19-21ị Di Do K ÞD3 s o 8D2 f ð19-22Þ The empirical formula for thickness of ange t ẳ 0:25 to 0:28Do 19-23ị The diameter of bolt circles D1 ẳ 1:4Do 19-24ị For design calculations of other dimensions of marine hollow rigid type of flange coupling The method of analyzing the stresses and arriving at the dimensions of the various parts of a marine hollow flange coupling is similar to that given for the marine solid rigid type and common flange coupling For dimensions of fitted half couplings for power transmission Refer to Table 19-2 PULLEY FLANGE COUPLING (Fig 19-3) The number of bolts i ẳ 20d ỵ SI 19-25aị USCS 19-25bị where d in m i ẳ 0:5d ỵ where d in in The preliminary bolt diameter 0:5d dt ¼ pffi i FIGURE 19-3 Pulley flange coupling Downloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com) Copyright © 2004 The McGraw-Hill Companies All rights reserved Any use is subject to the Terms of Use as given at the website ð19-26Þ Locating diameter, D4 H8/h7 75 95 125 150 195 240 280 330 400 480 580 720 Nominal diameter, d H7 30 40, 45, 50, 56 63, 71 80, 90 100, 110, 125 140 160, 180 200, 220 250 280, 320 360 400, 450, 500 100 125 160 190 240 290 340 400 480 570 670 850 Pitch circle diameter D1 TABLE 19-2 Fitted half couplings (all dimensions in mm) 6 6 8 10 10 10 12 12 No of bolts 13 17 21 25 25 32 38 44 50 60 68 95 Diameter of hole, d2 H7 Bolt M12 M16 M20 M24 M24 M30 M36 M32 M48 M56 M64 M90 Bolt size, d1 70 90 120 145 190 230 270 320 380 460 540 690 Hub diameter, D2 80 100 180 155 200 240 285 335 400 480 570 720 Shoulder diameter, D2 125 160 200 240 300 360 420 500 600 710 850 1050 Flange diameter, D 80 110 140 170 210 250 300 350 410 470 550 650 Long 58 82 105 130 165 200 240 280 330 380 450 540 Short Length of shaft end, l COUPLINGS, CLUTCHES, AND BRAKES 19.10 Downloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com) Copyright © 2004 The McGraw-Hill Companies All rights reserved Any use is subject to the Terms of Use as given at the website COUPLINGS, CLUTCHES, AND BRAKES COUPLINGS, CLUTCHES, AND BRAKES Particular The width of flange l1 (Fig 19-3) 19.11 Formula l1 ¼ d ỵ 0:025 SI 19-27aị USCS 19-27bị SI 19-28aị USCS ð19-28bÞ SI ð19-29aÞ USCS ð19-29bÞ SI ð19-30aÞ USCS ð19-30bÞ SI ð19-31aÞ USCS ð19-31bÞ SI ð19-32aÞ USCS ð19-32bÞ where l1 and d in m l1 ẳ d ỵ 1:0 where d in in The hub length l l ẳ 1:4d ỵ 0:0175 where l and d in m l ẳ 1:4d ỵ 0:7 where l and d in in The thickness of the ange t ẳ 0:25d ỵ 0:007 where t and d in m t ¼ 0:25d þ 0:25 where t and d in in The hub diameter D2 ẳ 1:8d ỵ 0:01 where D2 and d in m D2 ẳ 1:8d ỵ 0:4 where D2 and d in in The average value of the diameter of the bolt circle D1 ẳ 2d ỵ 0:025 where D1 and d in m D1 ẳ 2d ỵ 1:0 where D1 and d in in The outside diameter of flange D ẳ 2:5d ỵ 0:075 where D and d in m D ẳ 2d ỵ 3:0 where D and d in in PIN OR BUSH TYPE FLEXIBLE COUPLING (Fig 19-4, Table 19-3) Torque to be transmitted D1 D1 Mt ¼ ipb ld Mt ¼ iF where pb ¼ bearing pressure, MPa (psi) F ¼ force at each pin, kN (lbf ) ¼ pb ld d ¼ outside diameter of the bush, m (in) Downloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com) Copyright © 2004 The McGraw-Hill Companies All rights reserved Any use is subject to the Terms of Use as given at the website ð19-33aÞ ð19-33bÞ COUPLINGS, CLUTCHES, AND BRAKES 19.12 CHAPTER NINETEEN Shear stress in pin p ẳ F 0:785dp 19-34ị where Bending stress in pin p ¼ allowable shearing stress, MPa (psi) dp ¼ d1 ¼ diameter of pin at the neck, m (in) l ỵb F b ẳ 19-35ị d 32 p OLDHAM COUPLING (Fig 19-5) The total pressure on each side of the coupling 19-36ị F ẳ pDh where h ¼ axial dimension of the contact area, m (in) The torque transmitted on each side of the coupling Mt ¼ 2Fl ẳ pD2 h 19-37ị where l ẳ D ¼ the distance to the pressure area centroid from the center line, m (in) p ¼ allowable pressure >8.3 MPa (1.2 kpsi) j Power transmitted P¼ pD2 hn 57;277 SI 19-38aị USCS 19-38bị where P in kW Pẳ pD2 hn 378;180 where P in hp; D, h in in; p in psi The diameter of the disk D ẳ 3d ỵ a 19-39ị The diameter of the boss D2 ẳ 2d 19-40ị Downloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com) Copyright © 2004 The McGraw-Hill Companies All rights reserved Any use is subject to the Terms of Use as given at the website Type of flexible couplings Max Downloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com) Copyright © 2004 The McGraw-Hill Companies All rights reserved Any use is subject to the Terms of Use as given at the website 45 56 75 85 110 130 150 16 22 30 45 56 75 85 110 130 30 45 56 75 85 110 130 12 16 22 30 45 56 75 85 110 B4 B5 B6 B7 B8 B9 B10 D1 D2 D3 D4 D5 D6 D7 D8 D9 150 30 22 B3 130 22 16 B2 D10 16 12 B1 number Min Coupling Bore, d TABLE 19-3 Cast-iron flexible couplings (all dimensions in mm) 500 400 315 250 200 165 132 110 100 80 500 400 315 250 200 170 132 112 100 280 212 180 140 100 80 280 212 180 140 100 80 D2 80 diameter, D, Hub diameter, Outside Flange 100 90 80 63 56 45 40 32 30 28 100 90 80 63 56 45 40 32 30 28 60 56 50 45 40 35 30 22 20 18 60 56 50 45 40 35 30 22 20 18 l1 length, l, width, Hub Thickness 55 50, 55 45, 50 40, 45 35, 40 30, 35 25, 30 18, 25 16, 18 15, 16 — — — — — — — — — — of disk, C 18 18 16 16 12 12 12 10 10 18 18 16 16 12 12 12 10 10 d1 of bolt, Diameter 16 16 12 12 8 6 8 6 4 3 holes of bolt Number 400 315 250 190 150 120 90 73 63 55 400 315 250 190 150 120 90 73 63 53 bolts, D1 28 28 22 22 15 15 15 12 12 10 28 28 22 22 15 15 15 12 12 10 t1 diameter of recess, Pitch circle Bolt — — — — — — — — — — 45 45 40 40 30 25 25 22 22 20 diameter Bush Nominal gap — — — — — — — — — — 6 5 4 2 holes, c coupling between Maximum 74.0 52.0 25.0 16.0 6.0 4.0 2.5 0.8 0.6 0.4 74.0 52.0 25.0 16.0 6.0 4.0 2.5 0.8 0.6 0.4 kW 100 rpm, rating per COUPLINGS, CLUTCHES, AND BRAKES 19.13 COUPLINGS, CLUTCHES, AND BRAKES 19.14 CHAPTER NINETEEN Particular FIGURE 19-5 Oldham’s coupling Formula FIGURE 19-6 Muff or sleeve coupling Length of the boss l ẳ 1:75d 19-41ị Breadth of groove D w h1 ¼ w h¼ ð19-42Þ The thickness of the groove The thickness of central disk The thickness of ange wẳ 19-43aị 19-43bị 19-44ị t ¼ 3d MUFF OR SLEEVE COUPLING (Fig 19-6) The outside diameter of sleeve D ẳ 2d ỵ 0:013 SI ð19-45aÞ USCS ð19-45bÞ where D, d in m D ẳ 2d ỵ 0:52 The outside diameter of sleeve is also obtained from equation where D, d in in sffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffi 16Mt Dẳ d1 K ị where K ẳ 19-46ị d D The length of the sleeve (Fig 19-6) l ẳ 3:5d 19-47ị Length of the key (Fig 19-6) l ¼ 3:5d sffiffiffiffiffiffiffiffiffiffiffi 16Mt d¼ d ð19-48Þ The diameter of shaft ð19-49Þ where Mt is torque obtained from Eq (19-2) Downloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com) Copyright © 2004 The McGraw-Hill Companies All rights reserved Any use is subject to the Terms of Use as given at the website COUPLINGS, CLUTCHES, AND BRAKES COUPLINGS, CLUTCHES, AND BRAKES Particular 19.15 Formula The width of the keyway bẳ 2Mt d2 ld 19-50ị The thickness of the key hẳ 2Mt 0b ld 19-51ị FAIRBAIRNS LAP-BOX COUPLING (Fig 19-7) The outside diameter of sleeve Use Eqs (19-45) or (19-46) The length of the lap l ¼ 0:9d þ 0:003 SI ð19-52aÞ USCS ð19-52bÞ SI ð19-53aÞ USCS ð19-53bÞ where l, d in m l ẳ 0:9d ỵ 0:12 where l, d in in The length of the sleeve L ẳ 2:25d ỵ 0:02 where L, d in m L ẳ 2:25d ỵ 0:8 where L, d in in FIGURE 19-7 Fairbairn’s lap-box coupling FIGURE 19-8 Split muff coupling SPLIT MUFF COUPLING (Fig 19-8) The outside diameter of the sleeve D ẳ 2d ỵ 0:013 SI 19-54aị USCS 19-54bị SI 19-55aị where D, d in m D ẳ 2d þ 0:52 where D, d in in The length of the sleeve (Fig 19-8) l ẳ 3:5d or 2:5d ỵ 0:05 where l, d in m Downloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com) Copyright © 2004 The McGraw-Hill Companies All rights reserved Any use is subject to the Terms of Use as given at the website COUPLINGS, CLUTCHES, AND BRAKES 19.16 CHAPTER NINETEEN Particular Formula l ¼ 3:5d or 2:5d ỵ 2:0 USCS 19-55bị where l, d in in The torque to be transmitted by the coupling dc t id 16 where 19-56ị Mt ẳ dc ẳ core diameter of the clamping bolts, m (in) i ¼ number of bolts SLIP COUPLING (Fig 19-9) ðD À D2 Þp The axial force exerted by the springs Fa ¼ With two pairs of friction surfaces, the tangential force F ¼ 2Fa The radius of applications of F with sufficient accuracy rm ¼ The torque Mt ẳ 0:000385D2 D2 ịD2 ỵ D1 ịp SI 19-57ị 19-58ị Dm D2 ỵ D1 ẳ 19-59ị 19-60aị Mt ẳ 0:3927D2 D2 ịD2 ỵ D1 Þp USCS ð19-60bÞ where the values of and p may be taken from Table 19-4 The relation between D1 and D2 D2 ẳ 1:6 D1 19-61ị where D1 and D2 are the inner and outer diameters of disk of friction lining FIGURE 19-9 Slip coupling Downloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com) Copyright © 2004 The McGraw-Hill Companies All rights reserved Any use is subject to the Terms of Use as given at the website ... 400 4 45 4 75 500 56 0 600 650 730 7 75 8 75 900 9 25 1000 1090 17 22 22 27 32 32 36 46 50 55 55 65 70 70 80 85 90 100 1 05 110 1 15 120 1 25 130 50 60 75 95 95 1 25 150 150 1 95 1 95 24 0 24 0 28 0 28 0 330... 24 . 25 27 .71 31.18 39 .26 47.34 57 .74 69 .28 22 .78 26 .17 29 .56 37 .29 45 .20 55 .37 66.44 7. 95 9 . 25 10. 75 13.40 15. 90 19. 75 23 .55 7 .24 8 .51 9.68 12. 12 14 .56 17. 92 21. 72 5 .2 6 .2 7 .2 8 .2 10 .5 13.1 15. 1... 46.00 55 .00 65. 00 75. 00 85. 00 45. 00 53 .80 62. 90 72. 60 82. 20 53 . 12 63 .51 75. 06 86.60 98. 15 50 .55 60.79 71.71 82. 76 93.71 19. 75 23 .55 27 . 05 31.07 36 .20 17. 92 21. 72 25. 03 28 .93 33.80 13.1 15. 8 18 .2 21.0