| 摘要 |
PROBLEM TO BE SOLVED: To provide a durable tooth for a crusher which has a high impact resistance when materials are crushed. SOLUTION: A main tooth 29 is detachably installed at the site of a fitting base 28 fixed to a rotary drum 8. The fitting base 28 has a shank 31 projecting from the periphery of the rotary drum 8 and the main tooth 29 is connected to the top end of the shank 31 by using bolts 33. The connecting surface S between the shank 31 and the main tooth 29 is a recess/projection surface, resulting in resisting to the impact load at the time of crushing which acts in the projecting direction of the shank 31. Therefore, the shear strength acting to a bolt 33 is reduced and the danger of dropping the main tooth 29 is eradicated by caused of breaking the bolt.
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