ABB
ABB/ BU Machines / HV Induction motors IEC catalogue / Engineered motors EN 12-2007
65
2
Vertical motors
Vertical motors 355 - 500 have deep groove ball bearing
in D-end and single-row angular contact ball bearing in
N-end.
The bearing in D-end is axially free in vertical machines
when an angular contact ball bearing is mounted in
N-end. Standard bearings of vertical machines are
stated in table below and the bearing construction is
shown in figure below.
Standard bearing solution is designed to carry the
weight of the typical coupling half and the weight of
the motor rotor only. Any additional radial or axial
force caused by driven equipment may require special
bearing construction.
Frame size
Poles
D-end
N-end
HXR 355
2
6317M/C3
7317 BMP
1)
HXR 355
t
4
6322/C3
7319 BMP
HXR 400
2
6317M/C3
7317 BMP
2)
HXR 400
t
4
6324/C3
7319 BMP
HXR 450
t
4
6324/C3
7322 BMP
HXR 500
t
4
6326/C3
7324 BMP
AMA 400
t
4
6324/C3
7319 BMP
AMA 450
t
4
6326/C3
7322 BMP
AMA 500
t
4
6330/C3
7324 BMP
1)
60 Hz motors have ball bearing 6317M/C3.
2)
Only for 50 Hz motors.
1 Bearing
2 Inner bearing cover
3 Grease valve
4 Outer bearing cover
5 Circlip
6 Hexagon screw
7 Spring
8 O-ring
Figure below:
Standard bearing construction of vertically mounted motor, frame sizes 355 - 500. On the left the
bearing is "axially locked" angular contact ball bearing and on the right is an axially free deep
groove ball bearing.
Table below: Standard bearings for vertical motors.