Spur Gears - Norfolk Bearings and Supply Company, Inc.
Spur Gears - Norfolk Bearings and Supply Company, Inc.
Spur Gears - Norfolk Bearings and Supply Company, Inc.
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SPEED RATIOS - CENTER DISTANCES - CHAIN LENGTHS<br />
Roller Chain Drives<br />
Selection<br />
Teeth<br />
Driven<br />
Teeth on Driver Sprocket<br />
Sprocket 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25<br />
1.36 1.25 1.15 1.07 1.00<br />
15<br />
16<br />
17<br />
6.469<br />
26<br />
1.45<br />
7.207<br />
28<br />
1.55<br />
7.943<br />
7.235<br />
28<br />
1.33<br />
6.971<br />
28<br />
1.42<br />
7.710<br />
6.993<br />
28<br />
1.23<br />
7.736<br />
30<br />
1.31<br />
7.473<br />
7.748<br />
20<br />
1.14<br />
7.494<br />
30<br />
1.21<br />
8.237<br />
7.500<br />
30<br />
1.07<br />
8.249<br />
32<br />
1.13<br />
7.994<br />
1.00<br />
8.000<br />
32<br />
1.06<br />
8.749<br />
1.00<br />
8.500<br />
RATIO<br />
CENTER DISTANCE - IN PITCHES<br />
CHAIN LENGTH - IN PITCHES<br />
To obtain corresponding values in<br />
INCHES, multiply by the appropriate<br />
Chain Pitch.<br />
30 30 30 32 32 34 34<br />
1.64 1.50 1.38 1.29 1.20 1.13 1.06 1.00<br />
18 7.669 8.446 8.212 7.975 8.737 8.495 9.249 9.000<br />
30 32 32 32 34 34 36 36<br />
1.73 1.58 1.46 1.36 1.27 1.19 1.12 1.06 1.00<br />
19 8.404 8.174 8.949 8.714 8.477 9.238 8.995 9.749 9.500<br />
32 32 34 34 34 36 36 38 38<br />
1.82 1.67 1.54 1.43 1.33 1.25 1.18 1.11 1.05 1.00<br />
20 8.124 8.909 8.679 9.452 9.216 8.978 9.739 9.495 10.249 10.000<br />
32 34 34 36 36 36 38 38 40 40<br />
1.91 1.75 1.61 1.50 1.40 1.31 1.24 1.17 1.11 1.05 1.00<br />
21 8.857 8.632 9.414 9.183 9.955 9.718 9.479 10.239 9.995 10.749 10.500<br />
34 34 36 36 38 38 38 40 40 42 42<br />
2.00 1.83 1.69 1.57 1.47 1.37 1.29 1.22 1.16 1.10 1.05 1.00<br />
22 9.590 9.365 9.139 9.918 9.686 10.457 10.220 9.980 10.740 10.496 11.249 11.000<br />
36 36 36 38 38 40 40 40 42 42 44 44<br />
2.09 1.92 1.77 1.64 1.53 1.44 1.35 1.28 1.21 1.15 1.10 1.05 1.00<br />
23 9.304 10.098 9.872 9.645 10.422 10.189 10.959 10.721 10.481 11.240 10.996 11.749 11.500<br />
36 38 38 38 40 40 42 42 42 44 44 46 46<br />
2.18 2.00 1.85 1.72 1.69 1.50 1.41 1.33 1.26 1.20 1.14 1.09 1.04 1.00<br />
24 10.037 9.815 10.605 10.378 10.150 10.926 10.692 11.461 11.222 10.982 11.741 11.496 12.249 12.000<br />
38 38 40 40 40 42 42 44 44 44 46 46 48 48<br />
2.27 2.08 1.92 1.79 1.67 1.56 1.47 1.39 1.31 1.25 1.19 1.14 1.09 1.04 1.00<br />
25 9.744 10.547 10.324 11.112 10.884 10.654 11.429 11.195 11.963 11.723 11.483 12.241 11.996 12.750 12.500<br />
38 40 40 42 42 42 44 44 46 46 46 48 48 50 50<br />
2.72 2.50 2.31 2.14 2.00 1.88 1.76 1.67 1.58 1.50 1.43 1.36 1.30 1.25 1.20<br />
30 11.345 12.161 11.943 12.746 12.522 12.299 13.087 12.858 13.638 13.406 13.172 13.942 13.705 14.469 14.228<br />
44 46 46 48 48 48 50 50 52 52 52 54 54 56 56<br />
2.91 2.66 2.46 2.28 2.14 2.00 1.88 1.78 1.68 1.60 1.52 1.45 1.39 1.33 1.28<br />
32 12.812 12.597 12.379 13.188 12.967 13.765 13.539 13.314 14.099 13.869 14.646 14.413 14.178 14.946 14.708<br />
48 48 48 50 50 52 52 52 54 54 56 56 56 58 58<br />
3.18 2.92 2.69 2.50 2.33 2.19 2.06 1.94 1.84 1.75 1.67 1.59 1.52 1.46 1.40<br />
35 13.976 13.761 13.546 14.361 14.141 13.921 14.721 14.497 15.288 15.061 14.833 15.613 15.382 16.155 15.921<br />
52 52 52 54 54 54 56 56 58 58 58 60 60 62 62<br />
3.27 3.00 2.77 2.57 2.40 2.25 2.12 2.00 1.89 1.80 1.71 1.64 1.56 1.50 1.44<br />
36 13.668 14.495 14.279 14.063 14.874 14.653 14.433 15.230 15.006 15.795 15.567 15.338 16.117 15.886 16.658<br />
52 54 54 54 56 56 56 58 58 60 60 60 62 62 64<br />
3.64 3.34 3.08 2.86 2.67 2.50 2.35 2.22 2.10 2.00 1.90 1.82 1.74 1.67 1.60<br />
40 15.561 15.349 15.136 15.961 15.746 15.528 16.339 16.119 16.920 16.697 16.473 17.262 17.035 17.818 17.588<br />
58 58 58 60 60 60 62 62 64 64 64 66 66 68 68<br />
3.82 3.50 3.23 3.00 2.80 2.62 2.47 2.34 2.21 2.10 2.00 1.91 1.83 1.75 1.68<br />
42 15.983 15.773 16.605 16.391 16.177 16.994 16.777 16.557 17.364 17.142 17.939 17.714 17.489 18.275 18.047<br />
60 60 62 62 62 64 64 64 66 66 68 68 68 70 70<br />
4.09 3.75 3.46 3.22 3.00 2.81 2.65 2.50 2.37 2.25 2.14 2.04 1.96 1.88 1.80<br />
45 17.139 16.930 16.719 17.553 17.340 18.161 17.945 17.728 18.536 18.317 18.096 18.895 18.671 19.463 19.237<br />
64 64 64 66 66 68 68 68 70 70 70 72 72 74 74<br />
For Center Distances other than listed in this Table, the Chain Length must be calculated, see Page 265.<br />
P-1930-BG 04/10 Boston Gear 800-825-6544 263<br />
H