Flender/Flender Gear Units/Helical gearboxes H2
3/1 ...3/6 Designation of gear unit faces ...................... 1/3 Dimensions of oil expansion unit B2, B3, B4, upright mounting position,

output at bottom ....................... 9/1 B2, B3, B4, vertical mounting position ................................................... 8/1 H1, H2, H3, H4, upright mounting position,

output at bottom ....................... 6/2 H1, H2, H3, H4, vertical mounting position ................................................... 5/1 Dip lubrication ............................................... 2/2 Direction of

rotation ........................1/1 , 1/3E Explanation of symbols used in the dimensional drawings ...................................1/4 Explosion protection as per ATEX 9 .........................................

1/2 , 1/2 Externally mounted parts Options for ...............................1/1 ...1/3 Factory certificates ....................................1/3 Fan ..............................................................1/6 Fitting dimensions for IEC motors ..................................1/2 ...1/3 Flange dimensions for IEC motors .................................................1/2 Flange-mounted pump ................................1/5 Further information ....................................1/3 Gear unit designations ..................................1/2 Gear unit dimensions Type B2, horizontal mounting position ..........................................7/2 ...7/5 Type B2, upright mounting position, output at bottom ..............9/2 ...9/5 Type B2, vertical mounting position ..........................................8/2 ...8/5 Type B3, horizontal mounting position ........................................7/6 ...7/1 Type B3, upright mounting position, output at bottom ............9/6 ...9/1 Type B3, vertical mounting position ..........................................8/6 ...8/7 Type B4, horizontal mounting position ......................................7/1 ...7/1