Bevel-helical gear boxes B3 on and ordering data Dimensions in mm Gear unit s B3-VV-7-D

Flender/Flender Gear Units/Bevel-helical gear boxes B3

or earth connection are available on the gear unit, other appropriate measures must be taken. This work must always be done by specialist electricians . Cable entries must be protected against moisture. 6 / 9BA 5 en 0/2.1 Screw connection classes, tightening torques and initial stressing forces 6.1.1 Screw connection classes The specified screw connections are to be fastened applying the tightening torques specified observing the table below. Table 1: Screw connection classes Screw connection classDistribution of emitted torque on the toolTightening procedure (Usually the tightening processes lie within the stated tool distribution.) 5 % up to 1 % Hydraulic tightening with mechanical screwdriver Torque controlled tightening with torque wrench or signal-emitting torque wrench Tightening with precision mechanical screwdriver with dynamic torque measuring 1 % up to 2 % Hydraulic tightening with mechanical screwdriver 2 % up to 5 % Tightening with pulse screwdriver or impact wrench without adjustment checking device Tightening by hand, using spanner without torque measuring device 6.1.2 Tightening torques and initial initial stressing forces The tightening torques apply to friction coefficients of total = 0.1. The friction coefficient total = 0.1 applies here to lightly oiled steel bolts, black-annealed or phosphatised and dry, cut counter threads in steel or cast iron. Lubricants which alter the friction coefficient must not be used and may overload the screw connection. Table 1: Initial tensioning forces and tightening torques for screw connections of strength classes 8.8; 1.9; 1.9 with common friction coefficient of total = 0.1 Nominal thread diameterStrength class of the boltInitial-tensioning force for screw-connection classes from table 1Tightening torque for screw-connection classes from table 1 mmFM min. NMA Nm M1.8 1 1 7 4.6 3.4 3.3 1.9 2 1 1 6.4 5.4 5.4 1.9 3 1 1 7.5 6.0 5.9 M1.8 2 1 1 7.7 6.1 5.0 1.9 3 2 1 1 9.1 8.6 1.9 4 2 1 1 1