Big Dimensions Require Expertise0 pages

54 Organi di trasmissione - novembre 2010
BEARINGS
Giangiacomo Colleoni
and Giulio Bianchi
As big size rolling bearings are
going to play an essential role
in proper operation of complex
machinery, their design and
production call for wise
quality-oriented decisions
by the manufacturer, under
pain of unexpected faults or,
still worse, machine downtimes.
Big dimensions
require expertise
ason, it is a matter of primary importance
to know the data of the application where
the bearing will be mounted on (specifications,
exploitation, technical diagram,
load, speed, operating temperature, misalignments,
lubrication type, etc.) in order
to select the adequate product, mainly in
terms of total cost of ownership, thus reducing
at the minimum the risk of unsuitable
parameters, which can cause serious
drawbacks. In the light of the fact that big
size bearings are going to carry out a criti-
Big size rolling bearings for
heavy industry are costly
and require long production
times and therefore
long delivery times. As a
result, users are generally
anxious about having at their disposal
the spare to be used in case of unexpected
faults or damages which can lead
to extremely long and burdensome machine
downtimes when the backup part
is not immediately available. For this re-
Big size RKB bearings
installed on a typical speed
multiplicator for megawatt
class wind turbines.
10 novembre 2010