Raceway sound is due to the rotating rolling element bearing NTN rolling in raceway and stimulate a smooth and continuous noise aligning roller bearings picture, the level or tone when aroused great attention only when. In fact, inspired by the raceway sound acoustic energy is limited, as in normal circumstances, bearing raceway sound quality is 25 ~ 27dB. This noise with radial load single row deep groove ball bearings for the most typical, it has the following characteristics: a noise, vibration is random; b vibration frequencies above 1kHz; c regardless of how changes in speed, noise main frequency. The sound pressure level is almost constant increases with the speed increase; when the radial clearance increases, a sharp increase in the sound pressure level d;. e NTN bearing rigidity increases Spherical roller bearings sales agents, the total sound pressure The lower the level, even if the speed increases, the total sound pressure level increases little; f the higher viscosity of the lubricant, the more low-key SPL spherical roller bearings price, but for grease lubrication, the viscosity, the shape of soap fibers. size can affect the noise level. Induction heating method using an induction heater can quickly and reliably and cleanly NTN Bearing heated to the desired temperature, which is particularly suitable for inner ring for fit occasions, but due to being heated inner ring, an outer ring with little heat, This can easily mounted on the shaft, but also easy to mount the housing bore. Heating method using a 50W bulb light bulb heating NTN bearings, can ensure the heating temperature at about 100 ℃, smaller bearings can be placed directly on the bulb, the larger the bearing can be placed inside the bulb tapered hood, tapered hood can prevent heat lamp lost, and uniform heating. Tapered hood can be adjusted lower position, in a certain range can adapt to different sizes of heated bearings. Dongguan Spherical roller bearings manufacturer | 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.