FIELD: testing engineering. SUBSTANCE: friction unit has specimen 2 that is set in motion by a rotation drive, counter-specimens 3 and 4 set in spherical holders 5 and 6 that can be self adjusted in the grooves on unit housing, and counter-specimen 7 received in race 8. The race is also a means for measuring moments of friction and wear and can move forward perpendicular to the axis of rotation of specimens under the action of the load applied by spring 13. EFFECT: improved design. 2 dwg
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