Bearings for Sanitary Environments
PRODUCT
Railway freight rolling bearing appearance defects - — scratch
by：Waxing
2020-11-15
Railway freight rolling bearing appearance defects -
—
Scrape 2020 -
04 -
Railway wagon wheels with bearings are usually made by the inner and outer ring, roller, retainer, grease and seal etc.
Railway freight car rolling bearing is a kind of typical contact fatigue under parts, all in accordance with the use of the site may find fault forms bearing damage can be divided into the following several types: stripping, raceway grinding skin, race, color, race, pitting, corrosion, raceway surface rough, electric erosion, and bearing saddle poor contact, crack or split, knock against injury, micro wear, dent, indentation, etc.
Mixer definition of railway freight car rolling bearings parts surface metal migration phenomenon caused by sliding friction.
Pieces of hurt characteristics on the surface of bearing assembly work along the rolling direction in certain length and depth of metal migration phenomenon, caused by sliding friction surface mechanical damage.
Can occur in various bearing components of the surface.
Pieces more scratch wound place in railway freight car rolling bearing inner and outer ring raceway surface and roller working surface.
Pieces of hurt cause low bearing clearance is too small.
Low and poor lubrication grease containing impurities.
Low axial preload is too large.
Mixer degree classification low abrasion depth & le;
0.
025 ㎜ defect category B;
Low abrasion depth> 0.
025 mm, for defect category C.
（
Source: the resources of railway vehicle platform)
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