![Black Bruin BB 4 Product Manual Download Page 48](http://html.mh-extra.com/html/black-bruin/bb-4/bb-4_product-manual_2764299048.webp)
BBC series motors
MOTOR LOAD CURVE: BBC 02 AND BBC 03
F
max
[kN]
Figure 50. Motor load carrying capacity Fmax.
Wheel off-
set, a [mm]
MOTOR LOAD CURVE: BBC 05
F
max
[kN]
Figure 51. Motor load carrying capacity Fmax.
Wheel off-
set, a [mm]
Service life
The service life of the motor is based on the rated life of its bearings. The bearings
load curve gives the wheel load value, which the motors endures for 10 million
rotations with 90 % reliability.
The service life may be estimated with the following equation:
L
10h
= nominal service life [h]
RPM = rotating speed [rpm]
F
r
= average wheel load [kN]
F
10m
= bearing load carrying capacity [kN]
5.1.3
Motor Sizing
48
Product Manual