There are many installation ways of motor, which mainly can be divided into horizontal type and vertical type.In the horizontal type,it can be divided again:B3,B35,B34,B5,B6,B7,B8,B9,B10,B14,B15,B20,B30；In the vertical type,it can be divided again:V1,V15,V2,V3,V36,V4,V5,V6,V8,V9,V10,V14,V16,V18,V19,V21,V30,V31.
But the most important and most commonly used installation type is B3 (General horizontal), B5 (with flange ,but no base) B35 (with base with flange) .The B3 is installed horizontally,the B35 is also installed horizontally.
B3 has base, no direct connected flange;
B5 has no base, but has direct connected flange;
B35 has base, and has direct connected flange;
The main differences of B3,B5,B35 are as below: