| 摘要 |
A combi roll comprising a roll shaft and a roll ring mounted on the same against which at least one other ring is axially pressed, such as a spacer ring, the contact surfaces of the rings pressed against each other serving as torque-transferring friction joints. In the individual interface between two end contact surfaces there is distributed a great number of small grains of a material harder than the hardest material of anyone of the rings, the grains having the purpose of partially penetrating into each one of the contact surfaces so as to increase the torque-transferring ability of the friction joint.
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