Republic Drill - Technical Data - Taps & Dies - Speeds For Metric Taps

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Taps & Dies

Speeds For Metric Taps

Conversion Chart: Feet per minute (fpm) to Revolutions per minute (rpm)

Metric Size(mm)	Decimal Size*	Feet per minute
Metric Size(mm)	Decimal Size*	5	10	15	20	25	30	35	40	50	60	70	80	90	100	125	150	175	200
1.6	.06295	303	605	910	1210	1520	1820	2120	2430	3030	3640	4240	4850	5450	6050	7600	9100	10600	12100
2	.07874	242	485	730	970	1210	1460	1700	1940	2430	2910	3400	3880	4370	4850	6050	7300	8500	9700
2.5	.09843	194	388	580	775	970	1160	1360	1550	1940	2330	2720	3100	3496	3880	4856	5800	6800	7750
3	.11611	162	323	485	645	810	970	1130	1290	1620	1940	2260	2590	2910	3230	4046	4850	5650	6450
3.5	.13780	138	277	416	555	695	830	970	1110	1390	1660	1940	2220	2490	2770	3460	4160	4850	5540
4	.15748	121	242	364	485	605	730	850	970	1210	1450	1700	1940	2180	2430	3030	3640	4240	4850
4.5	.17717	108	216	323	431	540	645	755	860	1080	1290	1510	1720	1940	2160	2690	3230	3770	4310
5	.19685	97	194	291	388	485	580	680	775	970	1160	1360	1550	1750	1940	2430	2910	3400	3880
6	.23622	80	162	242	323	404	485	565	645	810	970	1130	1290	1450	1620	2020	2430	2830	3230
7	.27559	69	138	208	277	346	416	485	553	695	830	970	1110	1250	1390	1730	2080	2430	2770
8	.31496	60	121	182	242	303	364	424	485	605	730	850	970	1090	1210	1520	1820	2120	2430
10	.39370	48	97	146	194	242	291	340	388	485	580	680	775	875	970	1210	1400	1700	1940
12	.47244	40	80	121	162	202	242	263	323	404	485	565	645	730	810	1010	1210	1410	1620
14	.55116	35	69	104	139	173	208	242	277	346	416	485	555	625	695	865	1040	1210	1390
16	.62992	30	61	91	121	152	182	212	242	303	364	424	485	545	605	760	910	1060	1210
20	.78740	24	48	73	97	121	146	170	194	242	291	340	386	436	485	605	730	850	970
24	.94488	20	40	61	81	101	121	141	162	202	242	283	323	364	404	505	605	705	810
30	1.18110	16	32	48	65	81	97	113	129	162	194	226	259	291	323	464	485	565	645
36	1.41732	13	27	40	54	67	81	94	108	135	162	189	216	242	270	337	404	472	540

*Decimal Size Based on Nominal O.D.

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