Page:Practical Treatise on Milling and Milling Machines.djvu/328

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322

Brown & Sharpe Mfg. Co.

TABLE OF TOOTH PARTS—Continued

CIRCULAR PITCH IN FIRST COLUMN

Circular Pitch	Threads or Teeth per inch. Linear.	Diametral Pitch	Thickness of Tooth on Pitch Line.	Addendum and Module	Working Depth of Tooth.	Depth of Space below Pitch Line.	Whole Depth of Tooth.	Width of Thread-Tool at End.	Width of Thread at Top.
P′	1″/P′	P	t	s	D″	s+f	D″+f	P′×.3005	P′×.3354
1/2	2	6.2832	.2500	.1592	.3183	.1842	.3433	.1547	.1677
4/9	2 1/4	7.0685	.2222	.1415	.2830	.1637	.3052	.1376	.1490
7/16	2/27	7.1808	.2187	.1393	.2785	.1611	.3003	.1354	.1467
3/7	2 1/3	7.3304	.2143	.1364	.2728	.1578	.2942	.1326	.1437
2/5	2 1/2	7.8540	.2000	.1273	.2546	.1473	.2746	.1238	.1341
3/8	2 2/3	8.3776	.1875	.1194	.2387	.1381	.2575	.1161	.1258
4/11	2 3/4	8.6394	.1818	.1158	.2316	.1340	.2498	.1125	.1219
1/8	3	9.4248	.1666	.1061	.2122	.1228	.2289	.1032	.1118
5/16	3 1/5	10.0531	.1562	.0995	.1989	.1151	.2146	.0967	.1048
3/10	3 1/3	10.4719	.1500	.0955	.1910	.1105	.2060	.0928	.1006
2/7	3 1/2	10.9956	.1429	.0909	.1819	.1052	.1962	.0884	.0958
1/4	4	12.5664	.1250	.0796	.1591	.0921	.1716	.0774	.0838
2/9	4 1/2	14.1372	.1111	.0707	.1415	.0818	.1526	.0688	.0745
1/5	5	15.7080	.1000	.0637	.1273	.0737	.1373	.0619	.0671
3/16	5 1/3	16.7552	.0937	.0597	.1194	.0690	.1287	.0580	.0629
2/11	5 1/2	17.2788	.0909	.0579	.1158	.0670	.1249	.0563	.0610
1/6	6	18.8496	.0833	.0531	.1061	.0614	.1144	.0516	.0559
2/13	6 1/2	20.4203	.0769	.0489	.0978	.0566	.1055	.0476	.0516
1/7	7	21.9911	.0714	.0455	.0910	.0526	.0981	.0442	.0479
2/15	7 1/2	23.5619	.0666	.0425	.0850	.0492	.0917	.0413	.0447
1/8	8	25.1327	.0625	.0398	.0796	.0460	.0858	.0387	.0419
1/9	9	28.2743	.0555	.0354	.0707	.0409	.0763	.0344	.0373
1/10	10	31.4159	.0500	.0318	.0637	.0368	.0687	.0309	.0335
1/16	16	50.2655	.0312	.0199	.0398	.0230	.0429	.0193	.0210
1/20	20	62.8318	.0250	.0159	.0318	.0184	.0343	.0155	.0168