Rexnord-Stephan S4 Catalogue

04-2007 3P0200-XX7. Technical AppendixExamplesExample 1SFN46C25-132M-4G, consumed power P a = 7.5 kWExpected sound pressure level at 1 meter?Service factor SF=1.2 ' use consumed power according to Table 1 (interpolate and round the values)L p ' = (67.8 +/- 1.5) dBADistance = 1 m, n1 = 1500 1/min i = 11.2 ' K 1 =K 2 =K 3 = 0L p = L p 'Guaranteed value = (67.8 + 1.5 + 3) dBA = 72.3 dBAExample 2SCF56B8-160M-4G, consumed power P a = 11kWExpected sound pressure level at 1 meter?Service factor SF = 3.45 ' Use half the catalog power data (see Gear unit selection tables)P/2 = (39/2) kW = 19.5 kW ---> L p ' = (72 +/- 2) dBADistance = 1 m, n1 = 1500 1/min, i < 11.2 ' K 1 = K 2 = 0, K 3 = 2 dBAL p = (L p ' + 2) dBA = (74 +/- 2) dBAGuaranteed value = (74 +2 + 3) dBA = 79 dB7.4.10 Mass moments of inertia J (10 -3 kgm 2 )The listed values each refer to the drive shaft of the gear unit.SI42/3-stage gear units J (10 -3 kgm 2 )Sizei N 16B 16C 26B 26C 36B 36C 46B 46C 56B 56C 66B 66C 76B 76C 86C 96C5 14.5 375.6 0.085 0.22 0.81 1.85 6.1 12.5 306.3 0.077 0.2 0.73 1.65 5.4 9.9 25.57.1 0.069 0.18 0.64 1.5 4.7 9.1 218 0.059 0.16 0.58 1.25 4.1 7.5 21.59 0.055 0.135 0.53 1.15 3.7 6.5 15.510 0.049 0.12 0.47 1.05 3.2 5.9 13.511.2 0.045 0.11 0.44 0.89 2.8 5 1112.5 0.043 0.093 0.4 0.82 2.55 4.2 9.7 4114 0.04 0.085 0.37 0.71 2.35 3.8 8.1 3416 0.036 0.077 0.35 0.64 2 3.1 7 2818 0.033 0.069 0.21 0.32 0.58 1.8 2.6 5.9 23.520 0.031 0.062 0.195 0.3 0.53 1.65 2.2 11 5 27.5 23 4922.4 0.029 0.055 0.18 0.28 0.62 0.47 1.55 2 9.8 4.2 23 17 40T46