1750 R. P. M. Input Speed ( Service Factor = 1 )
SERIES 40251
Ratio	100	150	200	300	500	750	1000	1200
Input HP	3.16	2.25	1.91	1.58	1.11	0.72	0.68	0.59
Efficiency (%)	0.75	0.68	0.64	0.60	0.49	0.43	0.39	0.36
Output Torque (lb-in)	8483	8265	8816	10210	9708	8401	9481	9242
SERIES 40251
Ratio	1500	1800	2000	2500	3000	3500	4200	4900
Input HP	0.51	0.46	0.41	0.31	0.28	0.26	0.22	0.18
Efficiency (%)	0.33	0.31	0.29	0.36	0.25	0.22	0.18	0.17
Output Torque (lb-in)	9145	9314	8648	9918	7536	7238	5881	5400
Maximum allowable torque with standard construction : 6000 (lb-in)
SERIES 50251
Ratio	100	150	200	300	500	750	1000	1200
Input HP	5.41	3.50	2.98	2.45	1.72	1.33	1.05	1.29
Efficiency (%)	0.78	0.71	0.68	0.61	0.49	0.43	0.39	0.37
Output Torque (lb-in)	15240	13371	14558	16200	15252	15519	14895	20903
SERIES 50251
Ratio	1500	1800	2000	2500	3000	3500	4200	4900
Input HP	0.80	0.72	0.64	0.48	0.43	0.41	0.34	0.28
Efficiency (%)	0.35	0.32	0.30	0.37	0.26	0.22	0.19	0.17
Output Torque (lb-in)	14937	15146	13990	15737	12074	11371	9606	8400
Maximum allowable torque with standard construction : 8600 (lb-in)
SERIES 60301
Ratio	100	150	200	300	500	750	1000	1200
Input HP	9.13	6.50	5.53	4.55	3.20	2.47	1.95	1.72
Efficiency (%)	0.76	0.69	0.66	0.61	0.49	0.43	0.40	0.39
Output Torque (lb-in)	24995	24355	26118	29791	28325	28822	28211	28853
SERIES 60301
Ratio	1500	1800	2000	2500	3000	3500	4200	4900
Input HP	1.48	1.34	1.20	0.88	0.81	0.75	0.62	0.52
Efficiency (%)	0.35	0.32	0.30	0.28	0.26	0.23	0.18	0.17
Output Torque (lb-in)	27741	28128	25982	22250	22424	21536	17329	15912
Maximum allowable torque with standard construction : 10800 (lb-in)
SERIES 70351
Ratio	100	150	200	300	500	750	1000	1200
Input HP	11.23	8.00	6.80	5.60	3.94	3.04	2.40	2.11
Efficiency (%)	0.76	0.69	0.66	0.61	0.49	0.43	0.40	0.39
Output Torque (lb-in)	30764	29975	32145	36665	34862	35473	34721	35512
SERIES 70351
Ratio	1500	1800	2000	2500	3000	3500	4200	4900
Input HP	1.82	1.65	1.47	1.09	0.99	0.93	0.77	0.64
Efficiency (%)	0.35	0.32	0.30	0.28	0.26	0.23	0.18	0.17
Output Torque (lb-in)	34142	34619	31977	27384	27598	26506	21328	19584
Maximum allowable torque with standard construction : 17300 (lb-in)
SERIES 80351
Ratio	100	150	200	300	500	750	1000	1200
Input HP	12.64	10.00	8.50	7.00	4.92	3.80	3.00	2.64
Efficiency (%)	0.76	0.69	0.66	0.61	0.49	0.43	0.40	0.39
Output Torque (lb-in)	39813	43090	46209	52707	50114	50992	49911	51048
SERIES 80351
Ratio	1500	1800	2000	2500	3000	3500	4200	4900
Input HP	2.28	2.06	1.84	1.36	1.24	1.16	0.96	0.80
Efficiency (%)	0.35	0.32	0.30	0.28	0.26	0.23	0.18	0.17
Output Torque (lb-in)	49080	49765	45968	39365	39673	38103	30660	28152
Maximum allowable torque with standard construction : 30300 (lb-in)
SERIES 100501
Ratio	100	150	200	300	500	750	1000	1200
Input HP	29.06	23.98	17.93	14.72	14.57	11.16	9.26	4.92
Efficiency (%)	0.85	0.83	0.82	0.72	0.70	0.69	0.68	0.65
Output Torque (lb-in)	62269	75252	74117	80168	110204	124790	136134	138153
SERIES 100501
Ratio	1500	1800	2000	2500	3000	3500	4200	4900
Input HP	5.48	5.08	5.26	4.73	4.40	3.71	3.34	2.77
Efficiency (%)	0.62	0.61	0.57	0.55	0.5	0.48	0.47	0.47
Output Torque (lb-in)	128571	140672	151260	163865	166386	157058	166235	160588
Maximum allowable torque with standard construction : 95400 (lb-in)