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Do accurate gear cutting (or other circle dividing) up to 100 teeth (or divisions) on your rotary table without use of expensive index plates.

(For the folks who do not have computers to do the calculations!)
Tables of direct dial settings calculated to 18 decimal places and are accurate to 1 second of arc, which is only 1/3600th degree! There are no cumulative errors as you cut gears or divide circles. You could calculate these yourself, but for just a 26 tooth gear you will have to make 78 calculations and hope that they are all correct! Degrees, minutes and seconds are needed for each tooth. If your rotary table dial doesn't include seconds, just round them to the nearest 1/4 or 1/2 degree.

As an example, here are the dial settings from the table to cut a 26 tooth gear. Would you want to use a calculator to do this?

Deg.	Min.	Sec.		Deg.	Min.	Sec.		Deg.	Min.	Sec.
13	50	46		138	27	42		263	4	37
27	41	32		152	18	28		276	55	23
41	32	18		166	9	14		290	46	9
55	23	5		180	0	0		304	36	55
69	13	51		193	50	46		318	27	42
83	4	37		207	41	32		332	18	28
96	55	23		221	32	18		346	9	14
110	46	9		235	23	5		360	0	0
124	36	55		249	13	51

The tables include the direct dial settings for every gear from 8 to 100 teeth, plus tables of gear pitch diameters for 14 pitches in a range from 6 to 120. Also, there are formulas and examples to calculate various other apects of gears.