| 摘要 |
Disclosed is a highly noiseless magnet roller capable of reducing occurrence of noise upon operation as much as possible. The magnet roller includes a magnet main body and a shaft portion projecting from each or either of both ends of the magnet main body, wherein the magnet main body and the shaft portion are integrally molded from a bond magnet composition in which a magnetic powder is dispersed in a resin binder. In this magnet roller, the roundness of the shaft portion is specified to be in a range of 30 mu m or less.
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