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Sealed deep groove ball bearings in China with advanced foreign companies within the product structure parameters are almost the same, however the levels of vibration and noise of such products in China and foreign products far, mainly in manufacturing and effect of condition factors. From the standpoint in bearing industry, condition factors can make a reasonable request to the host to resolve, and how to reduce vibration and noise caused by production factors is a problem that must be addressed bearing industry.
Large numbers of tests at home and abroad show that cage, ring, the machining quality of bearing steel ball vibration has a different degree of influence, the machining quality of bearing steel ball vibration influence of the most obvious, followed by the processing quality of races, the most important factors is the roundness of steel balls and rings, waviness, roughness, surface bump hurt.
My steel ball products most highlight of problem is vibration value discrete large, surface defects serious (single points, and group points, and au pit,), despite surface rough degrees, and size, and shape, and errors are not below ring outside level, but collection set Hou bearing vibration value high, even produced different tone, main is corrugated degrees no control (no standard, and no suitable test analysis instrument), while description machine of anti-vibration sexual poor, wheel, and grinding disc, and cooling liquid, and technology parameter are exists problem; on the to improve management level, avoid bump hurt, and classified hurt, and Burn quality issues at any time.
For ring, bearing the most serious impact of the channel surface waviness and roughness. For example, small and medium deep groove ball bearing Raceway round inside and outside when larger than 2 μ m, will have a tangible impact on bearing vibration, inner and outer Groove waviness when greater than 0.7 μg m, waviness and increases the value of bearing vibration, vibration 4dB channel serious injuries can knock over, or even abnormal sound.
Both the ball and the ring, waviness results from grinding, Superfinishing can improve the waviness and roughness reduction, the most fundamental measure is to reduce the grinding Superfinishing waviness in the process, avoid random bump hurt, there are two main measures:
A is reduced scroll surface grinding Super fine Shi of vibration, obtained good of surface processing shape precision and surface lines quality for reduced vibration, mill Super machine must has good of anti-vibration sexual, bed body, important structure pieces has sucking vibration sexual, Super fine machine of oil stone oscillation system has good of anti-vibration performance; second is improve grinding speed, abroad grinding 6,202 outside roll road General used 60,000 electric spindle, grinding speed 60M/s above, domestic general low have more, main by spindle and the main bearing performance of limit. In high-speed grinding Shi, grinding force small, grinding metamorphic layer thin, not easy Burns, and can improve processing precision and efficiency, on low noise ball bearing effect is large; spindle movement stiffness and speed characteristics on low noise ball bearing grinding vibration effect is large, stiffness more high, grinding speed on grinding force of changes more not sensitive, grinding system vibration more small; improve spindle bearing support rigid, used with mobile balance technology, improve grinding spindle of anti-vibration sexual. Grinding head velocity in foreign countries (such as Gamfior) for the spindle of the domestic general one-tenth.
| Product Model | Inside Diameter | Outside Diameter | Thickness |
| 4T-LM11949/LM11910 NTN | 19.05 | 45.237 | 16.637 |
| 4T-A6075/A6157 NTN | 19.05 | 39.992 | 11.153 |