ABB
ABB/ BU Machines / HV Induction motors IEC catalogue / Standard motors EN 12-2007
15
1
Bearings
The motors are normally fitted with single-row deep
groove ball bearings as listed in the table below.
Axially-locked bearings
All motors are equipped as standard with an axially-
locked bearing at the D-end.
The bearing's outer ring is tightly locked between
bearing's covers and the housing fit.
Transport locking
Motors with roller bearings are fitted with a transport
lock to prevent damage to the bearings during
transport. All high voltage motors are fitted with a
warning sign when the transport lock is fitted to
prevent operational damage and alert operators.
Locking may be fitted in any other situations where
the transport conditions are considered as potentially
damaging.
Basic version with deep groove ball bearings
Version with roller bearings, variant code 037
If the bearing at the D-end is replaced with a roller
bearing (NU-), higher radial forces can be handled.
Roller bearings are suitable for belt drive applications.
The N-end bearing is axially free and can take the
thermal expansion. Note! NU-bearing is axially locked
at N-end.
Motor
Number
Deep groove ball bearings
size
of poles
D-end
N-end
315
2
6316M/C3
6316M/C3
4-6
6319/C3
6316/C3
355
2
6316M/C3
6316M/C3
4-6
6322/C3
6316/C3
400
2
6317M/C3
6317M/C3
4-8
6324/C3
6319/C3
450
2
6317M/C3
6317M/C3
4-8
6326M/C3
6322/C3
Motor
Number
Roller bearings, variant code 037
size
of poles
D-end
315
4-6
NU 319/C3
355
4-6
NU 322/C3
400
4-8
NU 324/C3
450
4-8
NU 326/C3