| 摘要 |
A roll tire hub of a pulverizer is provided to exchange flanges installed at the front and rear ends when the flanges are damaged so as to reduce maintenance and repair cost and to prevent damages due to fixing force improvement which is made by coupling bolt-combining keys with a roll tire. A roll tire hub transmits power to a roller tire combined to the outer peripheral surface in a pulverizer pulverizing coal used in a power plant. The roll tire hub includes a cylinder-shaped body(110) having a center portion inserted into a shaft and a step(112) formed at one end; a first flange(120) integrally formed on the other end of the body and provided with a first key(122) formed at the outer peripheral surface; and a second flange(130) formed separately from the body, bolt-combined to the step, and provided with a second key(136) formed at the outer peripheral surface.
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