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Service Factors:
     a. Light, even load — 1
     b. Irregular load without shock, rare reversals of direction - - 1.5
     c. Shock loads, frequent reversals — 2
Unflex Selection Procedure:
     a. Select the service factor according to the application.
     b. Multiply the horsepower or torque to be transmitted by the service factor to obtain rating.
     c. Select the coupling With an equivalent or slightly greater horsepower or torque than shown in the table.
3.4 Miscellaneous Couplings
This group of couplings incorporate design features which are frequently unique, approximations or combinations of universal, Oldham and flexible shaft couplings.
     Two widely used couplings in this category are the Jaw and Sleeve types, both of which are available in the Product Section of our catalog.

D200T55_1.jpg (5102 bytes)

 Jaw type couplings Consist of two metal hubs which are fastened to the input and output shafts. Trapped between the hubs is a Urethane spider” whose legs are confined between alternating metal projections from the adjacent hubs. The spider is the wearing member and can be readliy replaced without dismantling adjacent equipment. The coupling is capable of operating without lubrication and is unaffected by oil, grease, dirt or moisture. Select the proper size for your application from  the table in Figure 10 and the selection instructions.

Figure 9 Jaw Type Coupling

Coupling
Series No.		 Rated Torque in Lbs. Service Factor Horsepower capacity at Varying Speeds (R.P.M.)
100 300 400 900 1200 1500 1800 2400 3000 3600
035 3.5 1.0
1.5
2.0 		.0056
.0037
.0028 		.017
.011
.009		 .034
.023
.017		 .05
.033
.25		 .067
.045
.033 		.084
.056
.043 		.13
.087
.065 		.10
.067
.05 		.17
.113
.025 		2
.13
.10
050 25.2 1.0
1.5
2.0		 .04
.03
.02		 .12
.08
.06		 .24
.16
.12		 .36
.24
.18		 .48
.32
.24		 .60
.40
.30		 .72
.48
.36		 .96
.64
.42		 1.2
.80
.60		 1.44
.96
.70
070   
37.8
37.8		 1.0
1.5
2.0		 .06
.04
.03		 .18
.12
.09		 .36
.24
.12		 .54
.36
.27		 .72
.48
.36		 .90
.60
.45		 1.08
.72
.54		 1.44
.96
.72		 1.8
1.2
.90		 2.16
1.44
1.08
075 75.6 1.0
1.5
2.0		 .12
.08
.06		 .36
.24
.18		 .72
.48
.36		 1.08
.72
.54		 1.44
.96
.72		 1.80
1.20
.90		 2.16
1.44
1.08		 2.88
1.92
1.44		 3.6
2.4
1.8		 4.34
2.88
2.10
090 126 1.0
1.5
2.0		 .20
.13
.10		 .60
.40
.30		 1.2
.20
.60		 1.8
1.2
.90		 2.4
1.6
1.2		 3.0
2.0
1.5		 3.6
2.4
1.8		 4.8
3.2
2.4		 6.0
4.0
3.0		 7.2
4.8
3.6

Service Factors                                      Figure 10 Jaw Type Couplings Selection Data
1.0 _______ Even Load No Shock infrequent Reversing with Low Starling Torque
1.5 _______ Uneven Load Moderate Shock Frequent Reversing with LOW Start Torque
2.0 _______ Uneven Load Heavy Shock Hi Peak Loads Frequent Reversals with High Start Torque

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