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LEGEND International (China) Ltd.
Add: Unit 2307, Tower C, Tiley Central Plaza, No.3 Haide Road, Nanshan District, Shenzhen, Guangdong 518054, China,
Tel: +86-755-33202331
Fax: +86-755-33202365
Zip: 518054
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MYTHS OF BEARING APPLICATION
Time: 2015-7-22   Hits: 3842 

Application myth #1: Bearings should not be hot to the touch C FALSE.

Normal bearing operating temperatures can range from 80F to 150F, but certain applications may run higher or lower. Most bearings are rated for -20 to 220F, but can be supplied with special grease, seals or heat stabilizing processes that allow them to operate at higher temperatures. Bearings normally run hotter at start up or right after re-lubrication because excess grease increases drag and friction in the bearing. Spikes up to 50F are normal at start-up and 30F after re-lubrication. As the rolling elements purge excess grease through the seals, the bearings return to steady-state temperatures.

 

Application myth #2: Bigger bearings are always better C FALSE.

Bigger bearings with a higher load capacity may show a higher fatigue life, but if the load does not achieve the minimum requirement, the rolling elements can skid along the raceway instead of rolling. This can cause high temperatures, excessive wear, lubrication breakdown and bearing failure.

 

Application myth #3: Sealed/lubed-for-life bearings will last forever C FALSE.

Bearing life depends on grease life, which is affected by the operating conditions (speed and load) and environment (temperature and contamination). Grease life can be improved with enhanced seals, proper installation and proper grease selection. Ultimately, the best bearing is the properly lubricated bearing.

 

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