B2-SV-7-D ica tions such as high speed andor low speed shaf Bevel-helical speed reduction gearbox B2

Flender/Flender Gear Units/Bevel-helical speed reduction gearbox B2

lignment which cannot be prevented, even by precise align-ment. Furthermore, because individual components of the drive train heat up differently during operation, heat expansion of the machine housings causes shaft misalignment. Poorly aligned drives are often the cause of seal or rolling bear- ing failure. Alignment should be carried out by specialist person-nel in accordance with the Siemens operating instructions. Depending on the direction of the effective shaft misalignment distinction is made between: The shaft misalignment expected must be taken into account on selecting the connection between the components and the input shaft or output shaft. Guidelines and limits for compensation of shaft misalignment can be obtained from the manufacturer. Maintenance Compliance with the conditions for operation and installation is essential. To prevent damage to the gear unit or failure of the drive, regular inspection and maintenance must be performed as specified in the operating instructions.Seal type of gear unit Maximum preservation life Mineral oil PAO oil PG oil Standard preservation Without restriction Up to 6 monthsUp to 6 months Up to 6 months Long-term preservation Labyrinth seal in combination with -ring sealUp to 1 monthsUp to 1 months Up to 1 months Shaft seal or taconite seal Up to 2 months Up to 2 months Up to 3 months Viscosity ISO-VG at 4 in mm2/ (cSt)Minimum temperature limits in Mineral oil PAO oil PG oil Dip lubrication VG 2 -1 -3 -2 VG 3 -1 -3 -2 VG 4 -6 -2 -2 Oil circulation lubricationVG 2 1 0 1 VG 3 1 1 1 When storing outside, the maximum storage time can be reduced to 1 months depending on the package type. Please observe the operating instructions.*B0';;. *B0';;.ZAxial misalignment Angular misalignment*B0';; . Radial misalignment Siemens AG 2 Siemens MD 3.1 2 Guidelines for selection 3/2 Constant mechanical power rating 3/4 Variable power rating 3/5 Key to symbols 3/6 Calculation example 3/8 Service factors Overview ta