Worm Reduction Gearbox

Ratio	Input Rpm	Output Rpm	112	162	200	237	250	287	300	337	400	500	600	700	800	1000	1200	1400
5/1	1500	300	0.6	1.25	2.5	3.5	3.5	7	7	11	15	25	42	57	75	100	125	175
	1000	200	0.5	1	2	2.75	2.75	5	5	8	12	20	30	42	53	70	95	135
	750	150	0.4	0.8	1.8	2.25	2.25	4	4	7	10	15	22	30	40	55	75	115
	500	100	0.3	0.6	1.2	1.6	1.6	3	3	5	7.5	11	15	20	25	35	50	75
7.5/1	1500	200	0.5	1	2	3	3	4.5	5	8	10	20	27	42	55	75	100	135
	100	133	0.4	0.8	1.6	2.2	2.2	4	4	6	8	15	20	32	45	60	75	115
	750	100	0.3	0.75	1.2	1.75	1.75	3.2	3.2	5	6.75	12	18	25	35	50	65	85
	500	66.7	0.2	0.5	1	1.5	1.5	2.5	2.5	4	5.5	9	12	17	25	35	50	65
10/1	1500	150	0.45	1	1.9	2.7	2.75	4.3	4.3	7	10	19	25	37	48	79	115	150
	1000	100	0.35	0.75	1.5	2	2	3.5	3.5	5.8	7	14	18	28	38	55	85	110
	750	75	0.3	0.65	1.2	1.6	1.7	2.9	2.9	3.6	6	12	17	23	31	45	66	96
	500	50	0.25	0.5	1	1.4	1.4	2	2.3	3.25	5	9	13	17	22	31	46	70
12.5/1	1500	120	0.42	1	1.7	2.2	2.2	4.01	4.1	6.2	8	14	23	35	48	74	104	140
	1000	80	0.32	0.8	1.3	1.7	1.7	3.3	3.3	4.8	6	11	18	24	34	51	76	107
	750	60	0.26	0.65	1.1	1.5	1.5	2.7	2.7	4	5.25	9.5	14.8	19	27	40	59	86
	500	40	0.21	0.5	0.85	1	1	2	2.2	3	4	7.25	11	14	19	28	38	59
15/1	1500	100	0.37	0.9	1.6	1.9	1.9	3.7	3.9	5.9	7	12	21	29	40	63	88	130
	1000	66.7	0.25	0.7	1.2	1.5	1.5	3	3	4.7	5.5	9.5	16	22	30	47	66	95
	750	50	0.22	0.58	0.9	1.3	1.3	2.5	2.5	3.75	4.7	7.75	13	18	24	37	53	80
	500	33.3	0.18	0.47	0.79	1	1	1.7	2.1	2.8	3.7	5.75	9	13	17	26	38	56
20/1	1500	75	0.31	0.7	1.1	1.5	1.5	2.75	2.75	4.3	6	11	17	22	30	48	72	110
	1000	50	0.22	0.53	0.88	1.2	1.2	2.2	2.2	3.4	4.8	8.5	12	17	23	36	54	80
	750	37.5	0.2	0.45	0.75	0.95	0.95	1.75	1.75	2.7	4	7	10	14	19	29	44	65
	500	25	0.15	0.35	0.55	0.75	0.75	1.4	1.5	2	3.3	5	7	10	14	21	32	49
25/1	1500	60	0.28	0.65	1	1.3	1.3	2.4	2.4	3.9	5	9.5	13	21	28	43	65	90
	1000	40	0.21	0.5	0.8	1	1	1.9	1.9	2.9	4	6.5	10	15	21	32	47	68
	750	30	0.18	0.45	0.65	0.8	0.8	1.6	1.6	2.4	3.25	5.5	8	12	17	25	37	56
	500	20	0.14	0.35	0.53	0.65	0.65	1.2	1.35	1.75	2.5	4.25	6	9	12	18	26	40
30/1	1500	50	0.23	0.6	0.9	1.2	1.2	2.2	2.2	3.5	4.5	8	12	17	22	39	59	75
	1000	33.3	0.18	0.45	0.75	0.9	0.9	1.6	1.6	2.75	3.5	6	9	12	17	29	40	60
	750	25	0.15	0.35	0.6	0.75	0.75	1.3	1.4	2.25	3	5	7	10	14	23	32	45
	500	16.7	0.12	0.3	0.5	0.6	0.6	1.1	1.3	1.7	2.25	4	5	7	10	16	22	35
40/1	1500	37.5	0.18	0.45	0.75	1	1	1.75	1.7	2.75	3.75	6	10	15	19	30	44	60
	1000	25	0.14	0.35	0.6	0.75	0.75	1.3	1.3	2	3	4.5	7	11	14	22	33	45
	750	18.8	0.12	0.25	0.5	0.7	0.7	1.1	1.1	1.7	2.25	3.5	6	9	11	18	25	35
	500	12.5	0.09	0.22	0.4	0.55	0.55	0.8	1.08	1.3	1.75	3	4	6	8	13	18	26
50/1	1500	30	0.15	0.35	0.6	0.9	0.9	1.5	1.5	2	2.75	5	8	12	16	24	36	52
	1000	20	0.12	0.25	0.45	0.7	0.7	1.1	1.1	1.5	2.25	4	6	10	12	18	29	40
	750	15	0.1	0.23	0.37	0.6	0.6	0.8	0.9	1.3	2	3.25	5	7	9	15	22	33
	500	10	0.07	0.17	0.3	0.45	0.65	0.8	0.8	1	1.5	2.5	4	6	7	11	16	24
60/1	1500	25	0.13	0.3	0.5	0.75	0.75	1.1	1.1	1.75	2.5	4.25	7	10	14	22	32	45
	1000	16.7	0.1	0.25	0.4	0.6	0.6	0.8	0.9	1.3	2	3.4	5	8	10	16	22	35
	750	12.5	0.09	0.2	0.3	0.5	0.5	0.7	0.8	1.2	1.7	2.75	4	7	9	13	19	30
	500	8.33	0.06	0.15	0.25	0.38	0.38	0.55	0.7	0.8	1.25	2	3	5	7	10	14	22
70/1	1500	21.4	0.1	0.25	0.4	0.6	0.6	1	1	1.5	2	3.75	6	8	11	19	25	40
	1000	14.3	0.09	0.2	0.3	0.5	0.5	0.75	0.75	1.2	1.7	3	4	7	9	15	20	32
	750	10.7	0.08	0.15	0.25	0.45	0.45	0.6	0.6	1.1	1.4	2.5	3.5	5	7	12	18	25
	500	7.14	0.06	0.12	0.2	0.35	0.35	0.5	0.5	0.75	1.1	1.5	3	4	5	9	13	20

Service Factor

Prime Mover	Duration Of Service	Uniform U	Moderate Shock M	Heavy Shock H
Electric Motor	2 hours per day	0.75	0.9	1.25
	8 hours per day	0.90	1.1	1.45
	12 hours per day	1.0	1.25	1.55
	24 hours per day	1.25	1.5	1.75