The following characteristics:. A grease lubrication is easy to produce, easy to produce oil lubrication. When more likely to have low quality grease. b. winter often occur. c. For only the role of radial loads and larger radial clearance is also easy to produce. d. will be generated within a specific range and bearing speed range of different sizes are also different. e. may also be a continuous sound may be intermittent sound. f. The often forced vibration excitation of second order outer ring, third bending natural vibration, so the issue of the noise. The heating temperature to be controlled properly, high temperature will be NTN Bearing damage, the temperature is too low, insufficient amount of expansion of the ferrule aligning roller bearings pictures, the effect is not significant. Heating temperature of the resulting thermal expansion of 80 ~ 100 ℃ of the inner diameter roller bearing, which has a general interference in terms of NTN Bearing Spherical Roller Bearings, is already sufficient. A heating temperature reaches the required, should be installed as soon as possible, in order to avoid the occurrence of cooling and difficult to install. Spherical roller bearings picture, Long Yu (certified), roller bearings provided by the Dongguan City, Long-Bearing Machinery Co., Ltd. Dongguan City, Long-Bearing Machinery Co., Ltd. (long-yu.net) Dongguan, Guangdong, thrust roller bearings leaders, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. In the Long-leadership with the staff warmly welcome all inquiries negotiations to create a better future Long Yu.