EXPERIMENTAL APPROACH OF
SCUFFING FAILURE IN ANGULAR CONTACT
1 "Gh. Asachi"
Technical University of Iasi, ROMANIA
2 INSA de Lyon,
The diversity of running-in conditions and,
implicitly, of their influences on scuffing failure in rolling
bearings contacts limits researcher options to a global
investigation. Occasionally, abnormal operation causes premature
bearing failure by micro-scuffing and/or scuffing. An experimental
study has been performed both on the specimens and full bearings to
estimate the scuffing limits in angular contact ball bearings.
Some scuffing tests have been carried out on the high-speed
twin-disk machine available at LMC. The specimens were manufactured
to allow a simulative tribotesting for scuffing risk. The simulation
criteria refer to material, geometric characteristics and
lubrication regime of the practical system, which is a 7206 angular
ball bearing. High-speed specimen tests were performed to obtain an
important ball-inner race contact sliding (>10 m/s) promoting
Another series of scuffing tests were applied on the 7206 angular
contact ball bearing mounted in an original test rig. An
electromagnetic brake fixed on the cage assured the cage braking.
Owing to this, the ball-inner race sliding speeds was substantially
increased and the scuffing appeared.
The accurate choice of simulation criteria leads to establishment of
a unique scuffing limit in a given ball bearing for imposed running
scuffing, angular ball bearing,
experimental investigation, critical temperature