X90 mobile modules
X90 mobile system User's manual V 1.20 - Translation of the original manual
271
Installation errors
Installation errors
Warping
Damage during installation
Bearing rings tilting towards each other
Improper exposure to heat during installation
Foreign bodies (chippings, dirt)
Improper storage, lack of maintenance
Improper transport, lack of maintenance
Bearing play changed through assembly
Penetration of water or other media
Welding current
Hammer blows during installation
Errors in the attachment parts
Too loose fit
Too tight fit
Housing insufficiently rigid
Unsuitable bearing play
Errors in operation
Previous transport oscillations
Rotary/Torsional oscillations
Previous oscillations when idle
Micro-oscillations
Operational oscillations
Exceeding the permissible speed of the roller bearing
Overloading
Undershooting the minimum load
Bearing play changed through operation
Constant passage of current with low strength
Sparkovers (current)
Temperature fluctuations
Penetration of water or aggressive media
Heavily alternating dynamics/load change
Lubrication errors
Lack of lubricant
Overlubrication
Aging of the lubricant
Unsuitable lubricant
Impurity of the lubricant
Errors in the attachment parts
Deviations in the shape of the shaft seat
Deviations in the shape of the bearing housing
Inadequate surface quality (polished surfaces)
O
n outer or inner ring
Increased wear
Rolling marks beyond the ring circumference
Classic fatigue
Pitting
Flattening
Overload breakage
Overheating
Roller element impressions
Breakage of the ring
Elastic-plastic deformation
Running marks on the rings
Chatter marks
Dig marks
Smearing
Rough, discolored surfaces
S
Peeling
Failure causes
Suitability of the respective
characteristic values to monitor
the potential failures:
Very good
Good
Less good
Not assessed
Figure 104: Frequency of failure indicators on roller bearings
For the meaning of individual characteristic values, see
"Characteristic values" on page 170
and
"Configuration"
on page 193
.
