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Rolling bearing heating installation points: ①heating temperature to be controlled properly, the bearing temperature is too high will be damaged, the temperature is too low, the expansion of the ring is insufficient, the effect is not significant. The thermal expansion of the inner diameter of the inner ring, obtained at the heating temperature of 80 to 1000 ° C, is sufficient for bearings with general interference. ② Once the required heating temperature is reached, it is necessary to install it as soon as possible so as not to cause cooling and installation difficulties. ③ bearing cooling in the width direction also has shrinkage, so the installation to exert a certain pressure to the inner ring to the shoulder compression, and after cooling with a very thin feeler for testing, whether the inner ring face and shoulders Between the gap. In short, the butterfly requires skill, speed and accuracy.