Belt width (cm)	Clear margin (cm)	Total cross section area (m²) for 20° surcharge angle	Normal Operation speed (m/min)	Maximum Operation speed (m/min)
30.5	4.1	0.0072	61	122
35.6	4.3	0.0089	61	122
40.6	4.6	0.0122	61	137
45.7	4.8	0.0161	76	137
50.8	5.1	0.0204	76	152
61.0	5.6	0.0308	91	183
76.2	6.4	0.0504	107	213

Belt speed should be 91 m/min where a tripper is to be used, and 46-76 m/min where a plow is to be used.