Machinery's Handbook, 31st Edition
2316
CHECKING GEAR SIZES Table 10. Chordal Measurements over Spur Gear Teeth of 1 Diametral Pitch
M
Find value of M under pressure angle and opposite number of teeth; divide M by diametral pitch of gear to be measured and then subtract one-half total backlash to obtain a measurement M equivalent to given pitch and backlash. The number of teeth to gage or measure over is shown by Table 11.
Number of Gear Teeth
Number of Gear Teeth
Number of Gear Teeth
Number of Gear Teeth
M in Inches for 1 D.P. 4.6267 4.6321 4.6374 4.6428 4.6482 4.6536 4.6589 7.7058 7.7112 7.7166 7.7219 7.7273 7.7326 7.7380 7.7434 7.7488 7.7541 7.7595 7.7649 7.7702 7.7756 7.7810 7.7683 7.7917 7.7971 4.5963 4.6103 4.6243 4.6383 4.6523 4.6663 4.6803 7.6464 7.6604 7.6744 7.6884 7.7024 7.7165 7.7305 7.7445 7.7585 10.7246 10.7386
M in Inches for 1 D.P. 7.8024 10.8493 10.8547 10.8601 10.8654 10.8708 10.8762 10.8815 10.8869 10.8923 10.8976 10.9030 10.9084 10.9137 13.9606 13.9660 13.9714 13.9767 13.9821 13.9875 13.9929 13.9982 14.0036 14.0090 14.0143 10.7526 10.7666 10.7806 10.7946 10.8086 10.8226 10.8366 13.8028 13.8168 13.8307 13.8447 13.8587 13.8727 13.8867 13.9007 13.9147 16.8810 16.8950
M in Inches for 1 D.P. 14.0197 17.0666 17.0720 17.0773 17.0827 17.0881 17.0934 17.0988 17.1042 17.1095 17.1149 17.1203 17.1256 17.1310 20.1779 20.1833 20.1886 20.1940 20.1994 20.2047 20.2101 20.2155 20.2208 20.2262 20.2316 16.9090 16.9230 16.9370 16.9510 16.9650 16.9790 16.9930 19.9591 19.9731 19.9872 20.0012 20.0152 20.0292 20.0432 20.0572 20.0712 23.0373 23.0513
M in Inches for 1 D.P. 20.2370 23.2838 23.2892 23.2946 23.2999 23.3053 23.3107 23.3160 23.3214 23.3268 23.3322 23.3375 23.3429 23.3483 26.3952 26.4005 26.4059 26.4113 26.4166 26.4220 26.4274 26.4327 26.4381 26.4435 23.0653 23.0793 23.0933 23.1073 23.1214 23.1354 23.1494 26.1155 26.1295 26.1435 26.1575 26.1715 26.1855 26.1995 26.2135 26.2275
Pressure Angle, 14 1 ∕ 2 Degrees
12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29
37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47
62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65
87 88 89 90 91 92 93 94 95 96 97 98
99 100 101 102 103 104 105 106 107 108 109 110
… …
Pressure Angle, 20 Degrees
66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81
… … … …
Copyright 2020, Industrial Press, Inc.
ebooks.industrialpress.com
Made with FlippingBook - Share PDF online