| 摘要 |
A method for the production of a toothed belt pulley made of metal without machining which is provided at lateral sides with annular flanges which protrude above the height of the teeth comprising initially shaping one of the two flanges as an axially extending collar with an outside diameter equal to or less than the diameter of the pitch circle of the teeth and then radially flanging the said collar to the outside to form the second annular flange and the pulley formed thereby.
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