ABB
ABB/ BU Machines / HV Induction motors IEC catalogue / Engineered motors EN 12-2007
61
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Bearings
Horizontal motors
Horizontal motors 355 - 500 have deep groove ball
bearings in both ends. HXR 560 has a double bearing
arrangement (deep groove ball bearing and a cylindrical
roller bearing) at D-end and cylindrical roller bearing at
N-end (only horizontal motor available).
The bearing in D-end is axially locked in horizontal
motors. Standard bearings of horizontal motors are
stated in table below and the bearing construction is
shown in the figures on page 62.
The 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 need the bearings to
be specially constructed.
Table below: Standard bearings for horizontal motors.
Frame size
Poles
D-end
N-end
HXR 355
2
6317M/C3
6317M/C3
HXR 355
t
4
6322/C3
6319/C3
HXR 400
2
6317M/C3
6317M/C3
HXR 400
t
4
6324/C3
6319/C3
HXR 450
2
6317M/C3
6317M/C3
HXR 450
t
4
6324/C3
6322/C3
HXR 500
2
6319M/C3
6319M/C3
HXR 500
t
4
6326/C3
6324/C3
HXR 560
t
4
6034/C3 + NU1034/C3
NU322/C3
HXR 560
2
sleeve*
sleeve*
AMA 400
2
6319M/C3
6319M/C3
AMA 400
t
4
6324/C3
6319/C3
AMA 450
2
6319M/C3
6319M/C3
AMA 450
t
4
6326/C3
6322/C3
AMA 500
t
4
6330/C3
6324/C3
AMA 500
2
sleeve*
sleeve*
* See section sleeve bearings.