| 摘要 |
A sealed bearing rock bit for drilling oil wells and the like that includes a spring bearing member rotatably supporting the cutters on the pins of the bit. The resiliency of the spring bearing member on each pin is utilized to bias an annular seal member in a direction to maintain a face-type seal in fluid-tight, sealing engagement preventing loss of lubricant from the bit and preventing the ingress of deleterious material into the bit.
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