MILLING MACHINE INDEXING 1999 0.4444 12/27 24/54 0.4737 … 27/57 0.4444 8/18 … 0.4740 9/37 + 9/39 9/34 + 9/43 0.4450 7/37 + 11/43 3/24 + 8/25 0.4746 … 28/59 0.4460 11/23 − 1/31 22/46 − 2/62 0.4750 6/16 + 2/20 9/24 + 3/30 0.4468 21/47 21/47 0.4760 4/43 + 18/47 15/53 + 11/57 0.4470 6/21 + 5/31 14/49 + 10/62 0.4762 10/21 20/42 0.4474 … 17/38 0.4770 26/43 − 6/47 30/47 − 10/62 0.4480 10/41 + 10/49 27/41 − 8/38 0.4780 12/31 + 3/33 24/62 + 6/66 0.4483 13/29 26/58 0.4783 11/23 22/46 0.4490 22/49 22/49 0.4790 22/39 − 4/47 10/53 + 18/62 0.4490 20/39 − 3/47 14/57 + 12/59 0.4800 16/39 + 3/43 12/25 0.4500 9/20 6/24 + 6/30 0.4810 14/41 + 6/43 22/58 + 6/59 0.4510 … 23/51 0.4815 13/27 26/54 0.4510 5/15 + 2/17 42/62 − 12/53 0.4820 33/49 − 9/47 19/46 + 4/58 0.4516 14/31 28/62 0.4828 14/29 28/58 0.4520 14/39 + 4/43 4/49 + 20/54 0.4830 27/39 − 9/43 27/39 − 9/43 0.4524 … 19/42 0.4839 15/31 30/62 0.4528 … 24/53 0.4840 5/37 + 15/43 24/46 − 2/53 0 .4530 3/23 + 10/31 16/59 + 12/66 0.4848 16/33 32/66 0.4540 14/27 − 2/31 1/54 + 27/62 0.4850 24/47 − 1/39 3/24 + 9/25 0.4545 15/33 30/66 0.4860 13/43 + 9/49 43/62 − 11/53 0.4550 25/47 − 3/39 9/24 + 2/25 0.4865 18/37 18/37 0.4560 9/37 + 10/47 17/62 + 12/66 0.4870 15/37 + 4/49 26/43 − 4/34 0.4561 … 26/57 0.4872 19/39 19/39 0.4565 … 21/46 0.4878 20/41 20/41 0.4570 4/37 + 15/43 27/39 − 8/34 0.4880 8/29 + 7/33 5/46 + 22/58 0.4576 … 27/59 0.4884 21/43 21/43 0.4580 27/49 − 4/43 20/53 + 5/62 0.4890 28/43 − 6/37 19/47 + 5/59 0.4583 … 11/24 0.4894 23/47 23/47 0.4590 35/49 − 12/47 18/51 + 7/66 0.4898 24/49 24/49 0.4595 17/37 17/37 0.4900 13/21 − 4/31 6/24 + 6/25 0.4600 16/41 + 3/43 9/25 + 3/30 0.4902 … 25/51 0.4610 13/39 + 6/47 22/34 − 8/43 0.4906 … 26/53 0.4615 18/39 18/39 0.4910 15/39 + 5/47 21/46 + 2/58 0.4620 15/47 + 7/49 36/62 − 7/59 0.4912 … 28/57 0.4630 … 25/ 54 0.4915 … 29/59 0.4630 … 10/46 + 14/57 0.4920 25/37 − 9/49 17/46 + 6/49 0.4631 9/21 + 1/29 … 0.4930 8/41 + 14/47 21/53 + 6/62 0.4634 19/41 19/41 0.4940 33/49 − 7/39 14/46 + 11/58 0.4640 21/43 − 1/41 32/58 − 5/57 0.4950 5/29 + 10/31 9/24 + 3/25 0.4643 … 13/28 0.4960 8/23 + 4/27 20/53 + 7/59 0.4650 21/37 − 4/39 15/24 − 4/25 0.4970 33/47 − 8/39 7/46 + 20/58 0.4651 20/43 20/43 0.4980 20/37 − 2/47 29/41 − 9/43 0.4655 … 27/58 0.4990 26/41 − 5/37 26/41 − 5/37 0.4660 13/41 + 7/47 31/47 − 12/62 0.5000 8/16 12/24 0.4667 7/15 14/30 0.5000 9/18 14/28 0.4670 19/37 − 2/43 25/34 − 11/41 0.5000 10/20 15/30 0.4677 … 29/62 0.5000 … 17/34 0.4680 11/27 + 2/33 3/49 + 24/59 0.5000 … 19/38 0.4681 22/47 22/47 0.5000 … 21/42 0.4690 8/23 + 4/33 35/49 − 13/53 0.5000 … 23/46 0.4694 23/49 23/49 0.5000 … 27/54 0.4697 … 31/66 0.5000 … 29/ 58 0.4700 19/29 − 5/27 18/25 − 6/24 0.5000 … 31/62 0.4706 8/17 16/34 0.5000 … 33/66 0.4706 … 24/51 0.5010 5/37 + 15/41 37/51 − 11/49 0.4710 12/39 + 8/49 12/47 + 11/51 0.5020 17/37 + 2/47 25/53 + 2/66 0.4717 … 25/53 0.5030 8/39 + 14/47 16/49 + 9/51 0.4720 20/39 − 2/49 31/53 − 7/62 0.5040 5/43 + 19/49 37/66 − 3/53 0.4730 6/39 + 15/47 29/59 − 1/54 0.5050 21/31 − 5/29 15/24 − 3/25 0.4737 9/19 18/38 0.5060 7/39 + 16/49 22/53 + 6/66 Table 3. (Continued) Accurate Angular Indexing Part of a Turn B&S, Becker, Hendey, K&T, & Rockford Cincinnati and LeBlond Part of a Turn B&S, Becker, Hendey, K&T, & Rockford Cincinnati and LeBlond Machinery's Handbook 27th Edition Copyright 2004, Industrial Press, Inc., New York, NY 2000 MILLING MACHINE INDEXING 0.5070 33/47 − 8/41 28/46 − 6/59 0.5370 … 29/54 0.5080 12/37 + 9/49 41/66 − 6/53 0.5370 … 6/51 + 26/62 0.5085 … 30/59 0.5371 17/41 + 6/49 … 0.5088 … 29/57 0.5380 4/18 + 6/19 12/49 + 17/58 0.5090 24/39 − 5/47 27/51 − 1/49 0.5385 21/39 21/39 0.5094 … 27/53 0.5390 26/39 − 6/47 34/51 − 6/47 0.5098 … 26/51 0.5400 25/41 − 3/43 6/25 + 9/30 0.5100 8/21 + 4/31 18/24 − 6/25 0.5405 20/37 20/37 0.5102 25/49 25/49 0.5410 12/47 + 14/49 2/38 + 21/43 0.5106 24/47 24/47 0.5417 … 13/24 0.5110 6/37 + 15/43 26/49 − 1/51 0.5420 4/43 + 22/49 7/46 + 23/59 0.5116 22/43 22/43 0.5424 … 32/59 0.5120 21/29 − 7/33 45/66 − 9/53 0.5430 33/43 − 11/49 22/54 + 8/59 0.5122 21/41 21/41 0.5435 … 25/46 0.5128 20/39 20/39 0.5439 … 31/57 0.5130 22/37 − 4/49 30/54 − 2/47 0.5440 4/37 + 17/39 4/37 + 17/39 0.5135 19/37 19/37 0.5450 3/39 + 22/47 15/24 − 2/25 0 .5140 30/43 − 9/49 33/46 − 12/59 0.5455 18/33 36/66 0.5150 1/39 + 23/47 16/25 − 3/24 0.5460 13/27 + 2/31 2/34 + 19/39 0.5152 17/33 34/66 0.5470 21/31 − 3/23 32/49 − 7/66 0.5160 28/43 − 5/37 37/59 − 6/54 0.5472 … 29/53 0.5161 16/31 32/62 0.5476 … 23/42 0.5170 13/39 + 9/49 9/49 + 17/51 0.5480 12/41 + 12/47 25/39 − 4/43 0.5172 15/29 30/58 0.5484 17/31 34/62 0.5180 9/47 + 16/49 31/41 − 10/42 0.5490 10/15 − 2/17 8/47 + 25/66 0.5185 14/27 28/54 0.5490 … 28/51 0.5190 27/41 − 6/43 6/49 + 23/58 0.5500 11/20 6/24 + 9/30 0.5200 3/41 + 21/47 13/25 0.5510 19/39 + 3/47 31/53 − 2/59 0.5210 17/39 + 4/47 41/59 − 8/46 0.5510 … 27/49 0.5217 12/23 24/46 0.5517 16/29 32/58 0.5220 19/31 − 3/33 14/47 + 13/58 0.5520 31/41 − 10/49 29/46 − 4/51 0.5230 17/43 + 6/47 14/49 + 14/59 0.5526 … 21/38 0.5238 11/21 22/42 0.5530 15/21 − 5/31 28/54 + 2/58 0.5240 29/47 − 4/43 32/51 − 6/58 0.5532 26/47 26/47 0.5250 6/16 + 3/2 0 7/24 + 7/30 0.5540 12/23 + 1/31 12/53 + 19/58 0.5254 … 31/59 0.5550 1/41 + 26/49 17/25 − 3/24 0.5260 28/37 − 9/39 26/46 − 2/51 0.5556 10/18 30/54 0.5263 10/19 20/38 0.5556 15/27 … 0.5263 … 30/57 0.5560 32/41 − 11/49 35/47 − 10/53 0.5270 32/47 − 6/39 6/53 + 24/58 0.5570 22/41 + 1/49 18/49 + 11/58 0.5280 19/39 + 2/49 35/59 − 3/46 0.5580 3/29 + 15/33 7/53 + 23/54 0.5283 … 28/53 0.5581 24/43 24/43 0.5290 18/37 + 2/47 30/53 − 2/54 0.5588 … 19/34 0.5294 9/17 18/34 0.5590 27/37 − 7/41 43/59 − 9/53 0.5294 … 27/51 0.5593 … 33/59 0.5300 5/27 + 10/29 6/24 + 7/25 0.5600 37/49 − 8/41 14/25 0.5303 … 35/66 0.5606 … 37/66 0.5306 26/49 26/49 0.5610 23/41 23/41 0.5310 15/23 − 4/33 24/37 − 4/34 0.5610 4/23 + 12/31 5/51 + 25/54 0.5319 25/47 25/47 0.5614 … 32/57 0.5320 7/27 + 9/33 5/51 + 23/53 0.5620 1/23 + 14/27 9/34 + 11/37 0.5323 … 33/ 62 0.5625 9/16 … 0.5330 18/37 + 2/43 16/46 + 10/54 0.5630 12/39 + 12/47 22/46 + 5/59 0.5333 8/15 16/30 0.5640 25/33 − 6/31 41/49 − 18/66 0.5340 28/41 − 7/47 37/51 − 9/47 0.5641 22/39 22/39 0.5345 … 31/58 0.5645 … 35/62 0.5349 23/43 23/43 0.5650 10/31 + 8/33 3/24 + 11/25 0.5350 16/37 + 4/39 9/24 + 4/25 0.5652 13/23 26/46 0.5357 … 15/28 0.5660 4/39 + 19/41 9/46 + 20/54 0.5360 1/41 + 22/43 5/49 + 23/53 0.5660 … 30/53 0.5366 22/41 22/41 0.5667 … 17/30 Table 3. (Continued) Accurate Angular Indexing Part of a Turn B&S, Becker, Hendey, K&T, & Rockford Cincinnati and LeBlond Part of a Turn B&S, Becker, Hendey, K&T, & Rockford Cincinnati and LeBlond Machinery's Handbook 27th Edition Copyright 2004, Industrial Press, Inc., New York, NY MILLING MACHINE INDEXING 2001 0.5670 33/47 − 5/37 25/47 + 2/57 0.5970 6/47 + 23/49 13/58 + 22/59 0.5676 21/37 21/37 0.5980 35/49 − 5/43 16/47 + 17/66 0.5680 23/31 − 4/23 21/47 + 8/66 0.5990 17/37 + 6/43 23/49 + 7/54 0.5686 … 29/51 0.6000 9/15 15/25 0.5690 … 33/58 0.6000 12/20 18/30 0.5690 28/39 − 7/47 42/59 − 7/49 0.6010 32/41 − 7/39 32/41 − 7/39 0.5700 21/43 + 4/49 6/24 + 8/25 0.6020 13/16 − 4/19 20/47 + 9/51 0.5710 9/43 + 17/47 39/57 − 6/53 0.6030 16/41 + 10/47 24/49 + 6/53 0.5714 12/21 16/28 0.6034 … 35/58 0.5714 28/49 24/42 0.6038 … 32/53 0.5714 … 28/49 0.6040 23/31 − 4/29 21/58 + 15/62 0.5720 31/43 − 7/47 40/58 − 6/51 0.6047 … 26/43 0.5730 12/39 + 13/49 23/57 + 10/59 0.6050 11/37 + 12/39 3/24 + 12/25 0.5740 14/41 + 10/43 23/37 − 2/42 0.6053 … 23/38 0.5741 … 31/54 0.6060 28/41 − 3/39 29/54 + 4/58 0.5745 27/47 27/47 0.6061 20/33 40/66 0.5750 3/15 + 6/1 6 9/24 + 6/30 0.6070 31/49 − 1/39 23/47 + 6/51 0.5758 19/33 38/66 0.6071 … 17/28 0.5760 21/29 − 4/27 24/49 + 5/58 0.6078 … 31/51 0.5763 … 34/59 0.6080 1/31 + 19/33 24/53 + 9/58 0.5770 5/37 + 19/43 32/46 − 7/59 0.6087 14/23 28/46 0.5780 2/21 + 14/29 25/49 + 4/59 0.6090 17/31 + 2/33 40/59 − 4/58 0.5789 11/19 22/38 0.6098 25/41 25/41 0.5789 … 33/57 0.6100 23/33 − 2/23 6/24 + 9/25 0.5790 26/43 − 1/39 38/62 − 2/59 0.6102 … 36/59 0.5800 3/43 + 25/49 12/25 + 3/30 0.6110 1/39 + 24/41 5/28 + 16/37 0.5806 18/31 36/62 0.6111 … 33/54 0.5810 21/39 + 2/47 18/53 + 14/58 0.6120 27/41 − 2/43 29/39 − 5/38 0.5814 25/43 25/43 0.6122 30/49 30/49 0.5820 6/21 + 8/27 23/38 − 1/43 0.6129 19/31 38/62 0.5830 11/37 + 14/49 8/46 + 27/66 0.6130 15/19 − 3/17 1/49 + 32/54 0.5833 … 14/24 0.6140 25/39 − 1/37 36/49 − 7/58 0.5840 18/39 + 6/49 13/57 + 21/59 0.6140 … 35/ 57 0.5849 … 31/53 0.6150 22/37 + 1/49 9/24 + 6/25 0.5850 3/23 + 15/33 15/24 − 1/25 0.6154 24/39 24/39 0.5854 24/41 24/41 0.6160 10/41 + 16/43 14/53 + 19/54 0.5860 20/39 + 3/41 17/54 + 16/59 0.6170 12/37 + 12/41 5/59 + 33/62 0.5862 17/29 34/58 0.6170 29/47 29/47 0.5870 … 27/46 0.6176 … 21/34 0.5870 30/47 − 2/39 37/53 − 6/54 0.6180 5/39 + 24/49 3/53 + 32/57 0.5880 1/37 + 23/41 28/57 + 6/62 0.6190 1/43 + 28/47 17/53 + 17/57 0.5882 10/17 20/34 0.6190 13/21 26/42 0.5882 … 30/51 0.6200 23/43 + 4/47 8/25 + 9/30 0.5890 32/41 − 9/47 8/46 + 22/53 0.6207 … 36/58 0.5897 23/39 23/39 0.6210 29/37 − 7/43 6/46 + 26/53 0.5900 29/47 − 1/37 18/24 − 4/25 0.6212 … 41/66 0.5909 … 39/66 0.6216 23/37 23/37 0.5910 24/39 − 1/41 40/59 − 4/46 0.6220 14/27 + 3/29 15/53 + 20/59 0.5918 29/49 29/49 0.6226 … 33/53 0.5920 21/37 + 1/41 21/34 − 1/39 0.6230 24/37 − 1/39 24/37 − 1/39 0.5926 16/27 32/54 0.6240 5/29 + 14/31 4/49 + 32/59 0.5930 1/15 + 10/19 22/34 − 2/37 0.6250 10/16 15/24 0.5932 … 35/59 0.6260 12/43 + 17/49 21/46 + 10/59 0.5940 6/29 + 12/31 15/49 + 19/66 0.6270 17/47 + 13/49 24/46 + 6/57 0.5946 22/37 22/37 0.6271 … 37/59 0.5950 12/41 + 13/43 18/25 − 3/24 0.6275 … 32/51 0.5952 … 25/42 0.6279 27/43 27/43 0.5957 28/47 28/47 0.6280 23/33 − 2/29 28/47 + 2/62 0.5960 28/39 − 5/41 15/51 + 16/53 0.6290 11/39 + 17/49 12/54 + 24/59 0.5965 … 34/57 0.6290 … 39/62 0.5968 … 37/62 0.6296 17/27 34/54 Table 3. (Continued) Accurate Angular Indexing Part of a Turn B&S, Becker, Hendey, K&T, & Rockford Cincinnati and LeBlond Part of a Turn B&S, Becker, Hendey, K&T, & Rockford Cincinnati and LeBlond Machinery's Handbook 27th Edition Copyright 2004, Industrial Press, Inc., New York, NY 2002 MILLING MACHINE INDEXING 0.6300 11/41 + 17/47 18/24 − 3/25 0.6610 … 39/59 0.6304 … 29/46 0.6613 … 41/62 0.6310 9/37 + 19/49 8/49 + 29/62 0.6620 13/23 + 3/31 36/53 − 1/58 0.6316 12/19 24/38 0.6630 35/49 − 2/39 11/39 + 16/42 0.6316 … 36/57 0.6640 13/41 + 17/49 33/51 + 1/59 0.6320 12/37 + 12/39 12/34 + 12/43 0.6650 16/37 + 10/43 15/24 + 1/25 0.6327 31/49 31/49 0.6660 34/41 − 8/49 21/51 + 15/59 0.6330 13/27 + 5/33 14/51 + 19/53 0.6667 10/15 16/24 0.6333 … 19/30 0.6667 12/18 20/30 0.6340 7/17 + 4/18 25/37 − 1/24 0.6667 14/21 26/39 0.6341 26/41 26/41 0.6667 18/27 28/42 0.6350 9/39 + 19/47 19/25 − 3/24 0.6667 22/33 34/51 0.6360 7/37 + 21/47 12/54 + 24/58 0.6667 26/39 36/54 0.6364 21/33 42/66 0.6667 … 38/57 0.6370 5/47 + 26/49 10/47 + 28/66 0.6667 … 44/66 0.6379 … 37/58 0.6670 24/41 + 4/49 5/51 + 33/58 0.6380 12/27 + 6/31 6/34 + 18/39 0.6680 14/41 + 16/49 11/47 + 23/53 0.6383 30/47 30/47 0.6690 5/23 + 14/31 10/46 + 28/62 0 .6390 14/23 + 1/33 28/39 − 3/38 0.6700 37/49 − 4/47 18/24 − 2/25 0.6400 4/37 + 25/47 16/25 0.6710 9/21 + 8/33 15/47 + 19/54 0.6410 … 45/66 − 2/49 0.6720 15/41 + 15//49 7/54 + 32//59 0.6410 25/39 25/39 0.6724 … 39/58 0.6415 … 34/53 0.6730 7/43 + 25//49 42/57 − 3//47 0.6420 23/37 + 1/49 20/59 + 20/66 0.6735 33/49 33/49 0.6429 … 18/28 0.6739 … 31/46 0.6429 … 27/42 0.6740 4/39 + 28/49 21/53 + 15/54 0.6430 41/37 − 20/43 24/51 + 10/58 0.6744 29/43 29/43 0.6440 31/43 − 3/39 31/43 − 3/39 0.6750 10/16 + 1/20 9/24 + 9/30 0.6441 … 38/59 0.6757 25/37 25/37 0.6450 33/43 − 6/49 3/24 + 13/25 0.6760 20/23 − 6/31 43/62 − 1/57 0.6452 20/31 40/62 0.6765 … 23/34 0.6460 23/37 + 1/41 2/47 + 35/58 0.6770 7/37 + 20/41 26/53 + 11/59 0.6470 8/39 + 19/43 24/47 + 9/66 0.6774 21/31 42/62 0.6471 11/17 22/34 0.6780 … 40/59 0.6471 … 33/51 0.6780 21/39 + 6 /43 6/49 + 30/54 0.6480 31/41 − 4/37 43/57 − 5/47 0.6786 … 19/28 0.6481 … 35/54 0.6790 7/37 + 24/49 19/51 + 19/62 0.6486 24/37 24/37 0.6792 … 36/53 0.6490 3/23 + 14/27 8/30 + 13/34 0.6800 31/47 + 1/49 17/25 0.6491 … 37/57 0.6809 32/47 32/47 0.6500 13/20 6/24 + 12/30 0.6810 21/27 − 3/31 29/41 − 1/38 0.6510 18/29 + 1/33 25/59 + 15/66 0.6818 … 45/66 0.6512 … 28/43 0.6820 15/37 + 13/47 37/51 − 2/46 0.6515 … 43/66 0.6829 28/41 28/41 0.6520 8/31 + 13/33 46/59 − 6/47 0.6830 5/17 + 7/18 35/57 + 4/58 0.6522 15/23 30/46 0.6840 31/37 − 6/39 13/47 + 22/54 0.6530 24/31 − 4/33 22/54 + 14/57 0.6842 13/19 26/38 0.6531 32/49 32/49 0.6842 … 39/57 0.6540 23/41 + 4/43 34/58 + 4/59 0.6850 15/41 + 15/47 3/24 + 14/25 0.6550 23/31 − 2/23 9/24 + 7/25 0.6852 … 37/54 0.6552 19/29 38/58 0.6860 3/23 + 15/27 19/49 + 17/57 0.6560 29/41 − 2/39 23/24 − 13/43 0.6863 … 35/51 0.6570 10/23 + 6/27 20/46 + 12/54 0.6870 28/37 − 3/43 36/51 − 1/53 0.6579 … 25/38 0.6875 11/16 … 0.6580 10/21 + 6/33 20/34 + 3/43 0.6880 13/21 + 2/29 30/49 + 5/66 0.6585 27/41 27/41 0.6890 36/47 − 3/39 42/53 − 6/58 0.6590 15/27 + 3/29 3/54 + 35/58 0.6897 20/29 40/58 0.6596 31/47 31/47 0.6900 21/37 + 6/49 6/24 + 11/25 0.6600 8/47 + 24/49 9/25 + 9/30 0.6905 … 29/42 0.6604 … 35/53 0.6910 35/49 − 1/43 21/57 + 20/62 0.6610 2/41 + 30/49 34/57 + 4/62 0.6920 35/43 − 5/41 35/43 − 5/41 Table 3. (Continued) Accurate Angular Indexing Part of a Turn B&S, Becker, Hendey, K&T, & Rockford Cincinnati and LeBlond Part of a Turn B&S, Becker, Hendey, K&T, & Rockford Cincinnati and LeBlond Machinery's Handbook 27th Edition Copyright 2004, Industrial Press, Inc., New York, NY MILLING MACHINE INDEXING 2003 0.6923 27/39 27/39 0.7234 … 34/47 0.6930 19/37 + 7/39 19/37 + 7/39 0.7240 3/27 + 19/31 34/41 − 4/38 0.6935 … 43/62 0.7241 21/29 42/58 0.6939 34/49 34/49 0.7250 2/16 + 12/20 7/24 + 13/30 0.6940 10/23 + 7/27 14/38 + 14/43 0.7255 … 37/51 0.6949 … 41/59 0.7258 … 45/62 0.6950 24/33 − 1/31 9/24 + 8/25 0.7260 34/41 − 6/47 2/49 + 37/54 0.6957 16/23 32/46 0.7270 15/19 − 1/16 14/54 + 29/62 0.6960 15/31 + 7/33 32/47 + 1/66 0.7273 24/33 48/66 0.6970 … 46/66 0.7280 23/37 + 5/47 23/49 + 15/58 0.6970 24/39 + 4/49 24/51 + 12/53 0.7288 … 43/59 0.6977 30/43 30/43 0.7290 38/49 − 2/43 12/47 + 27/57 0.6980 22/29 − 2/33 4/47 + 38/62 0.7297 27/37 27/37 0.6981 … 37/53 0.7300 11/27 + 10/31 6/24 + 12/25 0.6990 34/47 − 1/41 14/58 + 27/59 0.7310 15/37 + 14/43 26/59 + 18/62 0.7000 14/20 21/30 0.7317 30/41 30/41 0.7010 24/43 + 7/49 28/47 + 6/57 0.7320 20/37 + 9/47 26/57 + 16/58 0.7018 … 40/ 57 0.7330 19/37 + 9/41 39/47 − 6/62 0.7020 10/21 + 7/31 7/37 + 20/39 0.7333 11/15 22/30 0.7021 33/47 33/47 0.7340 6/21 + 13/29 26/49 + 12/59 0.7027 26/37 26/37 0.7347 36/49 36/49 0.7030 25/31 − 3/29 23/58 + 19/62 0.7350 29/37 − 2/41 9/24 + 9/25 0.7037 19/27 38/54 0.7353 … 25/34 0.7040 8/37 + 20/41 47/59 − 5/54 0.7358 … 39/53 0.7050 19/37 + 9/47 15/24 + 2/25 0.7360 25/47 + 10/49 47/59 − 4/66 0.7059 12/17 24/34 0.7368 14/19 28/38 0.7059 … 36/51 0.7368 … 42/57 0.7060 18/37 + 9/41 38/58 + 3/59 0.7370 2/37 + 28/41 13/49 + 25/53 0.7069 … 41/58 0.7380 19/37 + 11/49 31/47 + 4/51 0.7070 6/39 + 26/47 7/30 + 18/38 0.7381 … 31/42 0.7073 29/41 29⁄ 41 0.7390 6/31 + 18/33 12/62 + 36/66 0.7080 30/39 − 3/49 13/58 + 30/62 0.7391 17/23 34/46 0.7083 … 17/24 0.7400 8/39 + 23/43 6/25 + 15/30 0.7090 34/39 − 7/43 31/46 + 2/57 0.7407 20/27 40/54 0.7097 22/31 44/62 0.7410 9/39 + 25/49 49/57 − 7/59 0.7100 20/43 + 12/49 18/24 − 1/25 0.7414 … 43/58 0.7105 … 27/38 0.7419 23/31 46/62 0.7110 22/29 − 1/21 33/39 − 5/37 0.7420 17/39 + 15/49 28/51 + 11/57 0.7119 … 42/59 0.7424 … 49/66 0.7120 6/39 + 24/43 31/54 + 8/58 0.7430 19/39 + 11/43 1/53 + 42/58 0.7121 … 47/66 0.7436 … 29/39 0.7130 27/43 + 4/47 17/30 + 6/41 0.7440 4/29 + 20/33 27/49 + 11/57 0.7140 6/43 + 27/47 45/57 − 4/53 0.7442 32/43 32/43 0.7143 15/21 20/28 0.7447 35/47 35/47 0.7143 35/49 30/42 0.7450 17/21 − 2/31 15/24 + 3/25 0.7143 … 35/49 0.7451 … 38/51 0.7150 28/43 + 3/47 21/25 − 3/24 0.7458 … 44/59 0.7160 2/47 + 33/49 25/51 + 14/62 0.7460 13/47 + 23/49 2/59 + 47/66 0.7170 … 38/53 0.7470 23/41 + 8/43 29/49 + 9/58 0.7170 29/43 + 2/47 28/59 + 16/66 0.7480 19/43 + 15/49 10/53 + 33/59 0.7174 … 33/46 0.7490 13/15 − 2/17 36/47 − 1/59 0.7179 28/39 28/39 0.7500 12/16 18/24 0.7180 22/27 − 3/31 21/58 + 21/59 0.7500 15/20 21/28 0.7190 39/49 − 3/39 12/57 + 30/59 0.7510 11/23 + 9/33 39/53 + 1/66 0.7193 … 41/57 0.7520 19/23 − 2/27 39/57 + 4/59 0.7200 2/43 + 33/49 18/25 0.7530 23/39 + 8/49 11/53 + 36/66 0.7209 31/43 31/43 0.7540 6/37 + 29/49 25/46 + 12/57 0.7210 13/29 + 9/33 21/47 + 17/62 0.7544 … 43/57 0.7220 18/23 − 2/33 13/46 + 29/66 0.7547 … 40/53 0.7222 13/18 39/54 0.7550 24/37 + 5/47 21/24 − 3/25 0.7230 6/29 + 16/31 11/46 + 30/62 0.7551 37/49 37/49 Table 3. (Continued) Accurate Angular Indexing Part of a Turn B&S, Becker, Hendey, K&T, & Rockford Cincinnati and LeBlond Part of a Turn B&S, Becker, Hendey, K&T, & Rockford Cincinnati and LeBlond Machinery's Handbook 27th Edition Copyright 2004, Industrial Press, Inc., New York, NY 2004 MILLING MACHINE INDEXING 0.7560 1/47 + 36/49 9/47 + 35/62 0.7860 17/37 + 16/49 49/58 − 3/51 0.7561 31/41 31/41 0.7870 10/39 + 26/49 30/37 − 1/42 0.7568 28/37 28/37 0.7872 37/47 37/47 0.7570 15/43 + 20/49 8/53 + 40/66 0.7879 26/33 52/66 0.7576 25/33 50/66 0.7880 6/39 + 26/41 45/51 − 5/53 0.7580 16/37 + 14/43 48/59 − 3/54 0.7890 19/41 + 14/43 37/49 + 2/59 0.7581 … 47/62 0.7895 … 30/38 0.7586 22/29 44/58 0.7895 … 45/57 0.7590 28/47 + 8/49 36/41 − 5/42 0.7900 15/37 + 15/39 18/24 + 1/25 0.7593 … 41/54 0.7903 … 49/62 0.7600 39/47 − 3/43 19/25 0.7907 34/43 34/43 0.7609 … 35/46 0.7910 8/29 + 17/33 7/49 + 35/54 0.7610 19/43 + 15/47 34/51 + 5/53 0.7917 … 19/24 0.7619 16/21 32/42 0.7920 8/29 + 16/31 4/47 + 41/58 0.7620 38/47 − 2/43 16/51 + 26/58 0.7925 … 42/53 0.7627 … 45/59 0.7930 10/39 + 22/41 7/47 + 38/59 0.7630 14/37 + 15/39 36/46 − 1/51 0.7931 23/29 46/58 0.7632 … 29/38 0.7940 28/43 + 7/49 14/57 + 34/6 2 0.7640 29/39 + 1/49 27/57 + 18/62 0.7941 … 27/34 0.7647 13/17 26/34 0.7949 31/39 31/39 0.7647 … 39/51 0.7950 24/37 + 6/41 21/24 − 2/25 0.7650 16/27 + 5/29 3/24 + 16/25 0.7959 39/49 39/49 0.7660 36/47 36/47 0.7960 2/39 + 35/47 18/37 + 13/42 0.7660 13/37 + 17/41 4/37 + 25/38 0.7963 … 43/54 0.7667 … 23/30 0.7966 … 47/59 0.7670 14/41 + 20/47 31/38 − 2/41 0.7970 40/47 − 2/37 13/53 + 32/58 0.7674 33/43 33/43 0.7980 14/39 + 18/41 33/51 + 8/53 0.7680 21/41 + 11/43 21/41 + 11/43 0.7990 3/37 + 28/39 10/28 + 19/43 0.7690 16/47 + 21/49 15/54 + 28/57 0.8000 12/15 20/25 0.7692 30/39 30/39 0.8000 16/20 24/30 0.7700 14/23 + 5/31 6/24 + 13/25 0.8010 32/37 − 3/47 10/47 + 30/51 0.7710 21/39 + 10/43 48/59 − 2/47 0.8020 27/31 − 2/29 54/62 − 4/58 0.7719 … 44/57 0.8030 18/39 + 14/41 18/39 + 14/41 0.7720 2/37 + 28/39 2/37 + 28/39 0.8030 … 53/66 0.7727 … 51/ 66 0.8039 … 41/51 0.7730 20/27 + 1/31 1/34 + 29/39 0.8040 10/43 + 28/49 32/49 + 8/53 0.7736 … 41/53 0.8043 … 37/46 0.7740 32/39 − 2/43 32/39 − 2/43 0.8049 33/41 33/41 0.7742 24/31 48/62 0.8050 22/23 − 5/33 3/24 + 17/25 0.7750 6/16 + 8/20 9/24 + 12/30 0.8060 34/41 − 1/43 13/47 + 27/51 0.7755 38/49 38/49 0.8065 25/31 50/62 0.7759 … 45/58 0.8070 5/15 + 9/19 15/58 + 34/62 0.7760 36/41 − 5/49 5/51 + 40/59 0.8070 … 46/57 0.7770 6/23 + 16/31 47/59 − 1/51 0.8080 19/21 − 3/31 22/39 + 10/41 0.7778 14/18 42/54 0.8085 38/47 38/47 0.7778 21/27 … 0.8090 22/39 + 12/49 28/53 + 16/57 0.7780 16/41 + 19/49 41/47 − 5/53 0.8095 … 34/42 0.7790 6/41 + 31/49 49/57 − 5/62 0.8100 33/43 + 2/47 6/24 + 14/25 0.7797 … 46/59 0.8103 … 47/58 0.7800 28/37 + 1/43 17/25 + 3/30 0.8108 30/37 30/37 0.7805 32/41 32/41 0.8110 7/27 + 16/29 34/53 + 10/59 0.7810 12/23 + 7/27 17/57 + 28/58 0.8113 … 43/53 0.7820 28/31 − 4/33 45/49 − 9/66 0.8120 17/29 + 7/31 34/58 + 14/62 0.7826 18/23 36/46 0.8125 13/16 … 0.7830 13/31 + 12/33 23/46 + 15/53 0.8130 6/43 + 33/49 16/24 + 6/41 0.7838 29/37 29/37 0.8136 … 48/59 0.7840 21/23 − 4/31 34/47 + 4/66 0.8140 35/43 35/43 0.7843 … 40/51 0.8140 28/33 − 1/29 14/47 + 32/62 0.7850 32/43 + 2/49 15/24 + 4/25 0.8148 22/27 44/54 0.7857 … 22/28 0.8150 22/47 + 17/49 9/24 + 11/25 0.7857 … 33/42 0.8158 … 31/38 Table 3. (Continued) Accurate Angular Indexing Part of a Turn B&S, Becker, Hendey, K&T, & Rockford Cincinnati and LeBlond Part of a Turn B&S, Becker, Hendey, K&T, & Rockford Cincinnati and LeBlond Machinery's Handbook 27th Edition Copyright 2004, Industrial Press, Inc., New York, NY MILLING MACHINE INDEXING 2005 0.8160 5/37 + 32/47 23/34 + 6/43 0.8478 … 39/46 0.8163 40/49 40/49 0.8480 30/41 + 5/43 31/59 + 20/62 0.8170 12/17 + 2/18 13/54 + 34/59 0.8485 28/33 56/66 0.8180 30/39 + 2/41 33/54 + 12/58 0.8490 13/41 + 25/47 2/47 + 50/62 0.8182 27/33 54/66 0.8491 … 45/53 0.8190 26/37 + 5/43 20/34 + 9/39 0.8500 17/20 18/24 + 3/30 0.8200 28/39 + 5/49 8/25 + 15/30 0.8510 5/21 + 19/31 22/37 + 10/39 0.8205 32/39 32/39 0.8511 40/47 40/47 0.8210 10/21 + 10/29 10/59 + 43/66 0.8519 23/27 46/54 0.8214 … 23/28 0.8520 1/16 + 15/19 55/62 − 2/57 0.8220 18/41 + 18/47 11/57 + 39/62 0.8529 … 29/34 0.8226 … 51/62 0.8530 17/21 + 1/23 19/58 + 31/59 0.8230 34/39 − 2/41 4/49 + 43/58 0.8537 35/41 35/41 0.8235 14/17 28/34 0.8540 15/39 + 23/49 54/62 − 1/59 0.8235 … 42/51 0.8548 … 53/62 0.8240 15/37 + 18/43 19/53 + 27/58 0.8550 19/37 + 14/41 9/24 + 12/25 0.8246 … 47/57 0.8560 24/43 + 14/47 37/53 + 9/ 57 0.8250 6/16 + 9/20 7/24 + 16/30 0.8570 3/43 + 37/47 51/57 − 2/53 0.8260 4/31 + 23/33 39/62 + 13/66 0.8571 18/21 24/28 0.8261 19/23 38/46 0.8571 42/49 36/42 0.8270 32/41 + 2/43 46/58 + 2/59 0.8571 … 42/49 0.8276 24/29 48/58 0.8580 25/43 + 13/47 38/51 + 7/62 0.8280 35/41 − 1/39 35/41 − 1/39 0.8590 11/27 + 14/31 22/54 + 28/62 0.8290 5/37 + 34/49 10/34 + 23/43 0.8596 … 49/57 0.8293 34/41 34/41 0.8600 1/43 + 41/49 9/25 + 15/30 0.8298 39/47 39/47 0.8605 37/43 37/43 0.8300 17/23 + 3/33 18/24 + 2/25 0.8610 16/37 + 21/49 18/46 + 31/66 0.8302 … 44/53 0.8620 13/37 + 24/47 17/38 + 17/41 0.8305 … 49/59 0.8621 25/29 50/58 0.8310 34/39 − 2/49 39/49 + 2/57 0.8627 … 44/51 0.8320 27/43 + 10/49 27/53 + 20/62 0.8630 38/41 − 3/47 18/46 + 25/53 0.8330 9/37 + 23/39 42/47 − 4/66 0.8636 … 57/66 0.8333 15/18 20/24 0.8640 11/16 + 3/17 56/62 − 2/51 0.8333 … 25/30 0.8644 … 51/ 59 0.8333 … 35/42 0.8649 32/37 32/37 0.8333 … 45/54 0.8650 4/41 + 33/43 15/24 + 6/25 0.8333 … 55/66 0.8660 10/17 + 5/18 13/57 + 37/58 0.8340 15/23 + 6/33 20/38 + 12/39 0.8667 13/15 26/30 0.8350 43/49 − 2/47 21/24 − 1/25 0.8670 3/21 + 21/29 28/54 + 23/66 0.8360 2/41 + 37/47 32/46 + 8/57 0.8679 … 46/53 0.8367 41/49 41/49 0.8680 36/47 + 5/49 53/59 − 2/66 0.8370 19/29 + 6/33 33/57 + 16/62 0.8684 … 33/38 0.8372 … 36/43 0.8690 40/43 − 3/49 39/47 + 2/51 0.8378 … 31/37 0.8696 20/23 40/46 0.8380 7/39 + 27/41 20/46 + 25/62 0.8700 4/39 + 33/43 18/24 + 3/25 0.8387 26/31 52/62 0.8704 … 47/54 0.8390 30/39 + 3/43 3/49 + 42/54 0.8710 27/31 54/62 0.8400 19/37 + 16/49 21/25 0.8710 17/27 + 7/29 31/51 + 15/57 0.8410 23/43 + 15/49 44/51 − 1/46 0.8718 34/39 34/39 0.8420 34/37 − 3/39 46/49 − 6/62 0.8720 30/37 + 3/49 26/58 + 25/59 0.8421 16/19 32/38 0.8723 41/47 41/47 0.8421 … 48/ 57 0.8730 15/39 + 21/43 21/49 + 24/54 0.8430 6/37 + 32/47 9/47 + 43/66 0.8740 15/39 + 23/47 5/53 + 46/59 0.8431 … 43/51 0.8750 14/16 21/24 0.8440 17/21 + 1/29 41/54 + 5/59 0.8760 21/23 − 1/27 48/57 + 2/59 0.8448 … 49/58 0.8770 3/37 + 39/49 37/51 + 10/66 0.8450 29/37 + 3/49 3/24 + 18/25 0.8772 … 50/57 0.8460 27/37 + 5/43 22/54 + 25/57 0.8776 43/49 43/49 0.8462 33/39 33/39 0.8780 24/47 + 18/49 31/53 + 17/58 0.8470 5/23 + 17/27 26/38 + 7/43 0.8780 36/41 36/41 0.8475 … 50/59 0.8788 … 58/66 Table 3. (Continued) Accurate Angular Indexing Part of a Turn B&S, Becker, Hendey, K&T, & Rockford Cincinnati and LeBlond Part of a Turn B&S, Becker, Hendey, K&T, & Rockford Cincinnati and LeBlond Machinery's Handbook 27th Edition Copyright 2004, Industrial Press, Inc., New York, NY 2006 MILLING MACHINE INDEXING 0.8790 22/43 + 18/49 52/58 − 1/57 0.9110 31/37 + 3/41 31/37 + 3/41 0.8793 … 51/58 0.9118 … 31/34 0.8800 31/39 + 4/47 22/25 0.9120 26/37 + 9/43 52/43 − 11/37 0.8810 … 37/42 0.9123 … 52/57 0.8810 19/29 + 7/31 8/51 + 42/58 0.9130 2/31 + 28/33 35/62 + 23/66 0.8814 … 52/59 0.9130 21/23 42/46 0.8820 20/37 + 14/41 42/57 + 9/62 0.9138 … 53/58 0.8824 15/17 30/34 0.9140 7/21 + 18/31 42/47 + 1/49 0.8824 … 45/51 0.9149 43/47 43/47 0.8830 27/41 + 11/49 7/51 + 44/59 0.9150 8/17 + 8/18 21/24 + 1/25 0.8837 38/43 38/43 0.9153 … 54/59 0.8840 23/29 + 3/33 37/47 + 6/62 0.9160 35/43 + 5/49 40/53 + 10/62 0.8850 7/23 + 18/31 3/24 + 19/25 0.9167 … 22/24 0.8860 38/41 − 2/49 38/59 + 15/62 0.9170 19/23 + 3/33 29/38 + 6/39 0.8868 … 47/53 0.9180 1/41 + 42/47 39/46 + 4/57 0.8870 28/41 + 10/49 34/51 + 13/59 0.9184 45/49 45/49 0 .8871 … 55/62 0.9189 34/37 34/37 0.8880 18/41 + 22/49 28/51 + 20/59 0.9190 14/23 + 9/29 8/46 + 38/51 0.8889 16/18 48/54 0.9194 … 57/62 0.8889 24/27 … 0.9200 28/37 + 8/49 23/25 0.8890 8/41 + 34/49 53/57 − 2/49 0.9210 17/37 + 18/39 23/49 + 28/62 0.8900 39/41 − 3/49 6/24 + 16/25 0.9211 … 35/38 0.8910 29/41 + 9/49 52/57 − 1/47 0.9216 … 47/51 0.8913 … 41/46 0.9220 26/39 + 12/47 10/34 + 27/43 0.8919 33/37 33/37 0.9229 31/37 + 4/47 … 0.8920 19/41 + 21/49 17/47 + 35/66 0.9230 … 29/54 + 22/57 0.8929 … 25/28 0.9231 36/39 36/39 0.8930 27/37 + 8/49 5/46 + 40/51 0.9240 15/41 + 24/43 45/59 + 10/62 0.8936 42/47 42/47 0.9242 … 61/66 0.8939 … 59/66 0.9245 … 49/53 0.8940 27/29 − 1/27 28/49 + 20/62 0.9250 14/16 + 1/20 7/24 + 19/30 0.8947 17/19 34/38 0.9259 25/27 50/54 0.8947 … 51/57 0.9260 17/43 + 26/49 2/51 + 47/53 0.8950 30/41 + 8/49 9/24 + 13/25 0.9268 38/41 38/41 0.8960 20/41 + 20/49 8/47 + 45/62 0.9270 28/37 + 8/47 29/59 + 27/62 0.8966 26/29 52/58 0.9280 3/39 + 40/47 47/57 + 6/58 0.8970 14/43 + 28/49 7/57 + 48/62 0.9286 … 26/28 0.8974 35/39 35/39 0.9286 … 39/42 0.8980 44/49 44/49 0.9290 12/37 + 26/43 16/53 + 37/59 0.8980 1/39 + 41/47 28/57 + 24/59 0.9298 … 53/57 0.8983 … 53/59 0.9300 5/29 + 25/33 6/24 + 17/25 0.8990 8/39 + 34/49 42/51 + 4/53 0.9302 40/43 40/43 0.9000 18/20 27/30 0.9310 25/37 + 12/47 7/30 + 30/43 0.9010 28/29 − 2/31 27/58 + 27/62 0.9310 27/29 54/58 0.9020 20/27 + 5/31 46/51 0.9320 30/39 + 7/43 59/62 + 1/51 0.9020 … 29/53 + 22/62 0.9322 … 55/59 0.9024 37/41 37/41 0.9330 34/39 + 3/49 5/42 + 35/43 0.9030 17/41 + 21/43 17/41 + 21/43 0.9333 14/15 28/30 0.9032 28/31 56/62 0.9340 1/37 + 39/43 56/59 − 1/66 0.9040 17/41 + 23/47 7/53 + 44/57 0.9348 … 43/46 0.9048 19/21 38/42 0.9350 2/39 + 38/43 9/24 + 14 /25 0.9050 38/43 + 1/47 15/24 + 7/25 0.9355 29/31 58/62 0.9057 … 48/53 0.9360 15/37 + 26/49 13/58 + 42/59 0.9060 17/43 + 24/47 17/58 + 38/62 0.9362 44/47 44/47 0.9070 39/43 39/43 0.9370 19/21 + 1/31 29/53 + 23/59 0.9070 14/29 + 14/33 7/47 + 47/62 0.9375 15/16 … 0.9074 … 49/54 0.9380 13/39 + 26/43 21/46 + 26/54 0.9080 1/27 + 27/31 29/54 + 23/62 0.9388 46/49 46/49 0.9090 14/37 + 26/49 8/53 + 47/62 0.9390 30/37 + 5/39 30/37 + 5/39 0.9091 30/33 60/66 0.9394 31/33 62/66 0.9100 14/39 + 27/49 18/24 + 4/25 0.9400 35/39 + 2/47 16/25 + 9/30 Table 3. (Continued) Accurate Angular Indexing Part of a Turn B&S, Becker, Hendey, K&T, & Rockford Cincinnati and LeBlond Part of a Turn B&S, Becker, Hendey, K&T, & Rockford Cincinnati and LeBlond Machinery's Handbook 27th Edition Copyright 2004, Industrial Press, Inc., New York, NY MILLING MACHINE INDEXING 2007 Approximate Indexing for Small Angles.—To find approximate indexing movements for small angles, such as the remainder from the method discussed in Angular Indexing starting on page 1990, on a dividing head with a 40:1 worm-gear ratio, divide 540 by the number of minutes in the angle, and then divide the number of holes in each of the available indexing circles by this quotient. The result that is closest to a whole number is the best approximation of the angle for a simple indexing movement and is the number of holes to 0.9410 30⁄41 + 9/43 25/47 + 27/66 0.9670 9/47 + 38/49 8/34 + 30/41 0.9412 16/17 32/34 0.9677 30/31 60/62 0.9412 … 48/51 0.9680 26/37 + 13/49 2/46 + 49/53 0.9420 15/37 + 22/41 42/47 + 3/62 0.9690 26/39 + 13/43 5/51 + 54/62 0.9430 9/23 + 16/29 12/49 + 37/53 0.9697 32/33 64/66 0.9434 … 50/53 0.9700 12/23 + 13/29 6/24 + 18/25 0.9440 9/43 + 36/49 26/46 + 25/66 0.9706 … 33/34 0.9444 17/18 51/54 0.9710 26/37 + 11/41 14/46 + 34/51 0.9450 37/41 + 2/47 15/24 + 8/25 0.9720 26/43 + 18/49 31/53 + 24/62 0.9459 35/37 35/37 0.9730 36/37 36/37 0.9460 12/39 + 30/47 22/46 + 29/62 0.9730 20/23 + 3/29 26/54 + 29/59 0.9470 33/47 + 12/49 14/49 + 41/62 0.9737 … 37/38 0.9474 18/19 36/38 0.9740 16/21 + 7/33 26/34 + 9/43 0.9474 … 54/57 0.9744 38/39 38/39 0.9480 18/37 + 18/39 11/38 + 27/41 0.9750 10/16 + 7/20 13/24 + 13/30 0.9483 … 55/58 0.9756 40/41 40/41 0.9487 37/39 37/39 0.9760 14/39 + 29/47 10/49 + 44/5 7 0.9490 1/15 + 15/17 13/47 + 39/58 0.9762 … 41/42 0.9492 … 56/59 0.9767 42/43 42/43 0.9500 19/20 6/24 + 21/30 0.9770 33/37 + 4/47 30/47 + 21/62 0.9510 29/43 + 13/47 41/53 + 11/62 0.9780 25/37 + 13/43 25/37 + 13/43 0.9512 39/41 39/41 0.9783 … 45/46 0.9516 … 59/62 0.9787 46/47 46/47 0.9520 8/43 + 36/47 30/53 + 22/57 0.9790 13/23 + 12/29 10/53 + 49/62 0.9524 20/21 40/42 0.9796 48/49 48/49 0.9530 5/43 + 41/49 16/59 + 45/66 0.9800 23/39 + 16/41 17/25 + 9/30 0.9535 41/43 41/43 0.9804 … 50/51 0.9540 29/37 + 8/47 28/54 + 27/62 0.9810 22/43 + 23/49 51/58 + 6/59 0.9545 … 63/66 0.9811 … 52/53 0.9550 7/39 + 38/49 21/24 + 2/25 0.9815 … 53/54 0.9560 13/37 + 26/43 13/37 + 26/43 0.9820 30/39 + 10/47 19/46 + 33/58 0.9565 22/23 44/46 0.9825 … 56/57 0.9570 14/21 + 9/31 21/47 + 25/49 0.9828 … 57/58 0.9574 45/47 45/47 0.9830 26/41 + 15/43 45/57 + 12/62 0.9580 5/39 + 39 /47 20/53 + 36/62 0.9831 … 58/59 0.9583 … 23/24 0.9839 … 61/62 0.9590 21/41 + 21/47 18/51 + 40/66 0.9840 13/37 + 31/49 1/46 + 51/53 0.9592 47/49 47/49 0.9848 … 65/66 0.9600 7/39 + 32/41 24/25 0.9850 6/23 + 21/29 15/24 + 9/25 0.9608 … 49/51 0.9860 16/23 + 9/31 42/53 + 12/62 0.9610 11/23 + 14/29 5/34 + 35/43 0.9870 15/21 + 9/33 13/34 + 26/43 0.9620 28/41 + 12/43 52/59 + 5/62 0.9880 7/39 + 38/47 5/46 + 51/58 0.9623 … 51/53 0.9890 33/39 + 7/49 20/39 + 20/42 0.9630 26/27 52/54 0.9900 10/29 + 20/31 18/24 + 6/25 0.9630 30/43 + 13/49 1/51 + 50/53 0.9910 22/23 + 1/29 21/46 + 31/58 0.9640 21/39 + 20/47 52/57 + 3/58 0.9920 39/41 + 2/49 40/53 + 14/59 0.9643 … 27/28 0.9930 8/23 + 20/31 21/53 + 37/62 0.9649 … 55/57 0.9940 7/23 + 20/29 14/46 + 40/58 0.9650 11/39 + 28/41 3/24 + 21/ 25 0.9950 35/39 + 4/41 21/24 + 3/25 0.9655 28/29 56/58 0.9960 40/41 + 1/49 43/46 + 3/49 0.9660 13/39 + 31/49 15/39 + 25/43 0.9970 15/23 + 10/29 30/46 + 20/58 0.9661 … 57/59 0.9980 20/41 + 25/49 12/51 + 45/59 0.9667 … 29/30 0.9990 10/41 + 37/49 6/51 + 52/59 Table 3. (Continued) Accurate Angular Indexing Part of a Turn B&S, Becker, Hendey, K&T, & Rockford Cincinnati and LeBlond Part of a Turn B&S, Becker, Hendey, K&T, & Rockford Cincinnati and LeBlond Machinery's Handbook 27th Edition Copyright 2004, Industrial Press, Inc., New York, NY [...]... 20 10 50 60 0 70 c a 80 170 90 160 100 110 150 120 130 140 Sector Graduations Copyright 2004, Industrial Press, Inc., New York, NY Machinery's Handbook 27th Edition MILLING MACHINE INDEXING 2 013 Table 4b (Continued) Simple and Differential Indexing Browne & Sharpe Indexing Plates No of Divisions 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151... 34 17 1 13 82 41 30 130 26 12 178 89 30 35 21 1 15 83 83 60 131 131 60 179 179 60 36 21 1 14 84 21 15 132 33 15 180 21 7 37 37 1 23 85 17 12 133 133 60 181 181 60 38 19 1 11 86 43 30 134 67 30 182 91 30 39 26 1 14 87 29 20 135 27 12 183 61 20 40 26 1 13 88 44 30 136 68 30 184 46 15 41 41 1 19 89 89 60 137 137 60 185 37 12 42 21 1 9 90 21 14 138 23 10 186 31 10 43 43 1 17 91 91 60 139 139 60... Machinery's Handbook 27th Edition 2022 MILLING MACHINE INDEXING Turns of Locking Disk Number of Teeth to be Cut Number Indexed at Once 1st Driver 1st Follower 2nd Driver 2nd Follower Turns of Locking Disk 70 50 66 30 60 72 70 96 84 90 68 40 44 82 62 2 2 2 2 2 125 126 128 129 130 132 7 5 5 7 7 5 100 100 100 100 100 100 50 50 60 30 50 88 84 50 90 84 84 80 50 42 64 86 52 40 2 2 2 2 2 2 133 134 135 136 138 140... 0 .130 5 0 .131 4 T 0.1745 0.1745 0.1744 0.1744 0.1743 0.1743 0.1741 0.1740 H 0.1116 0.1123 0. 1130 0. 1137 0.1143 0.1151 0.1160 0.1168 T 0.1570 0.1570 0.1570 0.1569 0.1569 0.1568 0.1567 0.1566 H 0.1004 0.1011 0.1017 0.1023 0.1029 0.1036 0.1044 0.1051 T 0.1428 0.1428 0.1427 0.1427 0.1426 0.1426 0.1425 0.1424 H 0.0 913 0.0919 0.0925 0.0930 0.0935 0.0942 0.0949 0.0955 T 0 .130 9 0 .130 9 0 .130 8 0 .130 8 0 .130 8 0 .130 7... 30 40 8 40 10 35 45 40 20 24 30 40 20 40 7 8 9 4 14 22 26 20 15 24 20 10 12 28 5 20 10 20 4 6 11 13 20 10 24 20 5 12 10 20 24 15 20 4 20 Circle Holes 137 69 139 28 42 77 91 141 71 143 36 87 73 147 111 149 30 151 38 133 171 153 77 93 117 157 79 159 28 32 36 26 91 143 169 131 99 159 133 67 81 189 34 137 69 139 28 42 77 91 141 71 171 143 36 87 73 147 177 111 149 30 151 Side Circle D A C F E D A B F F B... inch Circular Thickness of Tooth when Outside Diameter has been Reduced.—If the outside diameter of a gear is reduced, as is frequently done to maintain the standard center distance when the outside diameter of the mating pinion is increased, the circular thickness of the gear teeth at the standard pitch diameter will be reduced.This decreased circular thickness can be found by the following formula where...Machinery's Handbook 27th Edition 2008 MILLING MACHINE INDEXING be moved in the corresponding circle of holes If the angle is greater than 9 degrees, the whole number will be greater than the number of holes in the circle, indicating that one or more full turns of the crank are required Dividing by the number of holes in the indicated circle of holes will reduce the required indexing movement... required amount (when gears are required) are shown by Tables 4a and 4b, Simple and Differential Indexing with Browne & Sharpe Indexing Plates, which shows what divisions can be obtained by plain indexing, and when it is necessary to use gears and the differential system For example, if 50 divisions are required, the 20-hole index circle is used and the crank is moved 16 holes, but no gears are required... on feed-screw dial The feed-screw may be turned this fractional amount by setting dial back to its zero position for each indexing (without backward movement of feed-screw), or, if preferred, 64.2 (in this example) may be added to each successive dial position as shown below Dial reading for second position = 64.2 × 2 = 128.4 (complete movement = 1 turn × 64.2 additional divisions by turning feed-screw... Making Pinion Harder Forged and Rolled Carbon Steels Compositions Forged and Rolled Alloy Steels Compositions Steel Castings for Gears Compositions Effect of Alloying Metals Sintered Materials Steels for Industrial Gearing Bronze and Brass Gear Castings Materials for Worm Gearing Non-metallic Gears Power-Transmitting Capacity Safe Working Stresses Preferred Pitch Bore Sizes Preferred Pitches Keyway Stresses . 2 Hole b Machinery's Handbook 27th Edition Copyright 2004, Industrial Press, Inc., New York, NY 2020 MILLING MACHINE INDEXING 137 D 137 40 173 F 173 40 218 C 109 20 138 A 69 20 174 E 87 20 220 D 44 8 139 C 139 . 44 127 39 13/ 39 65 24 ……56 24 44 128 16 5/16 61 ……………… 129 39 13/ 39 65 24 ……72 24 44 130 39 12/39 60 ……………… 131 20 6/20 58 40 ……28 44 … 132 33 10/33 59 ……………… 133 21 6/21 56 24 ……48 44 … 134 21. 109== 3 7 3 9 4 1 4 3 4 7 4 9 c a b 30 20 10 0 40 80 70 60 50 90 100 110 120 130 140 150 160 170 Machinery's Handbook 27th Edition Copyright 2004, Industrial Press, Inc., New York, NY MILLING MACHINE INDEXING 2 013 125 39 13/ 39 65 24 ……40 24 44 126 39 13/ 39